A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope

Abdo, A. A.

doi:10.1051/0004-6361/201014458

Title: A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope

Journal Article · Wed Nov 24 00:00:00 EST 2010 · Astronomy and Astrophysics

DOI:https://doi.org/10.1051/0004-6361/201014458· OSTI ID:1357510

Abdo, A. A. ^[1]

Naval Research Lab. (NRL), Washington, DC (United States); et al.

Context. Globular clusters with their large populations of millisecond pulsars (MSPs) are believed to be potential emitters of high-energy gamma-ray emission. The observation of this emission provides a powerful tool to assess the millisecond pulsar population of a cluster, is essential for understanding the importance of binary systems for the evolution of globular clusters, and provides complementary insights into magnetospheric emission processes. Aims. Our goal is to constrain the millisecond pulsar populations in globular clusters from analysis of gamma-ray observations. Methods. We use 546 days of continuous sky-survey observations obtained with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope to study the gamma-ray emission towards 13 globular clusters. Results. Steady point-like high-energy gamma-ray emission has been significantly detected towards 8 globular clusters. Five of them (47 Tucanae, Omega Cen, NGC 6388, Terzan 5, and M 28) show hard spectral power indices (0.7 < Γ < 1.4) and clear evidence for an exponential cut-off in the range 1.0 - 2.6 GeV, which is the characteristic signature of magnetospheric emission from MSPs. Three of them (M 62, NGC 6440 and NGC 6652) also show hard spectral indices (1.0 < Γ < 1.7), however the presence of an exponential cut-off can not be unambiguously established. Three of them (Omega Cen, NGC 6388, NGC 6652) have no known radio or X-ray MSPs yet still exhibit MSP spectral properties. From the observed gamma-ray luminosities, we estimate the total number of MSPs that is expected to be present in these globular clusters. We show that our estimates of the MSP population correlate with the stellar encounter rate and we estimate 2600 - 4700 MSPs in Galactic globular clusters, commensurate with previous estimates. Conclusions. The observation of high-energy gamma-ray emission from globular clusters thus provides a reliable independent method to assess their millisecond pulsar populations.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Fermi LAT Collaboration

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1357510

Journal Information:: Astronomy and Astrophysics, Vol. 524; ISSN 0004-6361

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 92 works

Citation information provided by
Web of Science

References (46)

Timing of Millisecond Pulsars in NGC 6752: Evidence for a High Mass-to-Light Ratio in the Cluster Core D’Amico, N.; Possenti, A.; Fici, L. The Astrophysical Journal, Vol. 570, Issue 2 https://doi.org/10.1086/341030	journal	May 2002
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION Atwood, W. B.; Abdo, A. A.; Ackermann, M. The Astrophysical Journal, Vol. 697, Issue 2 https://doi.org/10.1088/0004-637X/697/2/1071	journal	May 2009
Deep Radio Imaging of Globular Clusters and the Cluster Pulsar Population Fruchter, A. S.; Goss, W. M. The Astrophysical Journal, Vol. 536, Issue 2 https://doi.org/10.1086/308948	journal	June 2000
Distances of the bulge globular clusters Terzan 5, Liller 1, UKS 1, and Terzan 4 based on HST NICMOS photometry Ortolani, S.; Barbuy, B.; Bica, E. Astronomy & Astrophysics, Vol. 470, Issue 3 https://doi.org/10.1051/0004-6361:20066628	journal	June 2007
Detection of High-Energy Gamma-Ray Emission from the Globular Cluster 47 Tucanae with Fermi Abdo, A. A.; Ackermann, M.; Ajello, M. Science, Vol. 325, Issue 5942 https://doi.org/10.1126/science.1177023	journal	August 2009
Chandra X‐Ray Observations of 19 Millisecond Pulsars in the Globular Cluster 47 Tucanae Bogdanov, Slavko; Grindlay, Jonathan E.; Heinke, Craig O. The Astrophysical Journal, Vol. 646, Issue 2 https://doi.org/10.1086/505133	journal	August 2006
A new look at the globular cluster M28 Rees, R. F.; Cudworth, K. M. The Astronomical Journal, Vol. 102 https://doi.org/10.1086/115863	journal	July 1991
VI Photometry of Globular Clusters NGC 6293 and NGC 6541: The Formation of the Metal-poor Inner Halo Globular Clusters Lee, Jae-Woo; Carney, Bruce W. The Astronomical Journal, Vol. 132, Issue 5 https://doi.org/10.1086/507412	journal	October 2006
Fermi Gamma-Ray Imaging of a Radio Galaxy Abdo, A. A.; Ackermann, M.; Ajello, M. Science, Vol. 328, Issue 5979 https://doi.org/10.1126/science.1184656	journal	April 2010
The ACS Survey of Galactic Globular Clusters. I. Overview and Clusters without Previous Hubble Space Telescope Photometry Sarajedini, Ata; Bedin, Luigi R.; Chaboyer, Brian The Astronomical Journal, Vol. 133, Issue 4 https://doi.org/10.1086/511979	journal	March 2007
Hubble Space Telescope Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae McLaughlin, Dean E.; Anderson, Jay; Meylan, Georges The Astrophysical Journal Supplement Series, Vol. 166, Issue 1 https://doi.org/10.1086/505692	journal	September 2006
Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT Abdo, A. A.; Ackermann, M.; Ajello, M. Science, Vol. 325, Issue 5942 https://doi.org/10.1126/science.1175558	journal	July 2009
Production of recycled pulsars in globular clusters via two-body tidal capture di Stefano, R. The Astrophysical Journal, Vol. 396 https://doi.org/10.1086/171742	journal	September 1992
FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: DATA PROCESSING, SKY MAPS, AND BASIC RESULTS Hinshaw, G.; Weiland, J. L.; Hill, R. S. The Astrophysical Journal Supplement Series, Vol. 180, Issue 2 https://doi.org/10.1088/0067-0049/180/2/225	journal	February 2009
The Dynamical State and Blue Straggler Population of the Globular Cluster NGC 6266 (M62) Beccari, G.; Ferraro, F. R.; Possenti, A. The Astronomical Journal, Vol. 131, Issue 5 https://doi.org/10.1086/500643	journal	May 2006
Eight New Millisecond Pulsars in NGC 6440 and NGC 6441 Freire, Paulo C. C.; Ransom, Scott M.; Bégin, Steve The Astrophysical Journal, Vol. 675, Issue 1 https://doi.org/10.1086/526338	journal	March 2008
The Dynamical Mass‐to‐Light Ratio Profile and Distance of the Globular Cluster M15 van den Bosch, Remco; de Zeeuw, Tim; Gebhardt, Karl The Astrophysical Journal, Vol. 641, Issue 2 https://doi.org/10.1086/500644	journal	April 2006
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal Supplement Series, Vol. 188, Issue 2 https://doi.org/10.1088/0067-0049/188/2/405	journal	May 2010
An XMM-Newton observation of the globular cluster Omega Centauri Gendre, B.; Barret, D.; Webb, N. A. Astronomy & Astrophysics, Vol. 400, Issue 2 https://doi.org/10.1051/0004-6361:20021845	journal	March 2003
THE FIRST FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal Supplement Series, Vol. 187, Issue 2 https://doi.org/10.1088/0067-0049/187/2/460	journal	March 2010
THE FIRST CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal, Vol. 715, Issue 1 https://doi.org/10.1088/0004-637X/715/1/429	journal	April 2010
XMM -Newton and Chandra observations of the globular cluster NGC 6388 Nucita, A. A.; De Paolis, F.; Ingrosso, G. Astronomy & Astrophysics, Vol. 478, Issue 3 https://doi.org/10.1051/0004-6361:20078850	journal	December 2007
On the Relative Distances of ω Centauri and 47 Tucanae Bono, G.; Stetson, P. B.; Sanna, N. The Astrophysical Journal, Vol. 686, Issue 2 https://doi.org/10.1086/593013	journal	September 2008
FERMI DISCOVERY OF GAMMA-RAY EMISSION FROM THE GLOBULAR CLUSTER TERZAN 5 Kong, A. K. H.; Hui, C. Y.; Cheng, K. S. The Astrophysical Journal, Vol. 712, Issue 1 https://doi.org/10.1088/2041-8205/712/1/L36	journal	February 2010
PULSED GAMMA RAYS FROM THE MILLISECOND PULSAR J0030+0451 WITH THE FERMI LARGE AREA TELESCOPE Abdo, A. A.; Ackermann, M.; Atwood, W. B. The Astrophysical Journal, Vol. 699, Issue 2 https://doi.org/10.1088/0004-637X/699/2/1171	journal	June 2009
A Deep Chandra Survey of the Globular Cluster 47 Tucanae: Catalog of Point Sources Heinke, C. O.; Grindlay, J. E.; Edmonds, P. D. The Astrophysical Journal, Vol. 625, Issue 2 https://doi.org/10.1086/429899	journal	June 2005
Formation and evolution of compact binaries in globular clusters â€“ II. Binaries with neutron stars Ivanova, N.; Heinke, C. O.; Rasio, F. A. Monthly Notices of the Royal Astronomical Society, Vol. 386, Issue 1 https://doi.org/10.1111/j.1365-2966.2008.13064.x	journal	May 2008
A CHANDRA STUDY OF THE GALACTIC GLOBULAR CLUSTER OMEGA CENTAURI Haggard, Daryl; Cool, Adrienne M.; Davies, Melvyn B. The Astrophysical Journal, Vol. 697, Issue 1 https://doi.org/10.1088/0004-637X/697/1/224	journal	May 2009
The integrated flux density of pulsars in globular clusters Fruchter, A. S.; Goss, W. M. The Astrophysical Journal, Vol. 365 https://doi.org/10.1086/185889	journal	December 1990
The dynamical distance and intrinsic structure of the globular cluster ω Centauri Astronomy & Astrophysics, Vol. 445, Issue 2 https://doi.org/10.1051/0004-6361:20053061	journal	December 2005
A new class of radio pulsars Alpar, M. A.; Cheng, A. F.; Ruderman, M. A. Nature, Vol. 300, Issue 5894 https://doi.org/10.1038/300728a0	journal	December 1982
MCAO near-IR photometry of the globular cluster NGC 6388: MAD observations in crowded fields Moretti, A.; Piotto, G.; Arcidiacono, C. Astronomy & Astrophysics, Vol. 493, Issue 2 https://doi.org/10.1051/0004-6361:200810718	journal	November 2008
DISCOVERY OF NEW GAMMA-RAY PULSARS WITH AGILE Pellizzoni, A.; Pilia, M.; Possenti, A. The Astrophysical Journal, Vol. 695, Issue 1 https://doi.org/10.1088/0004-637X/695/1/L115	journal	March 2009
X-ray binaries in globular clusters Clark, G. W. The Astrophysical Journal, Vol. 199 https://doi.org/10.1086/181869	journal	July 1975
The pulsar content of globular clusters Kulkarni, Shrinivas R.; Narayan, Ramesh; Romani, Roger W. The Astrophysical Journal, Vol. 356 https://doi.org/10.1086/168828	journal	June 1990
Binaries in globular clusters Hut, Piet; McMillan, Steve; Goodman, Jeremy Publications of the Astronomical Society of the Pacific, Vol. 104 https://doi.org/10.1086/133085	journal	May 1992
A Study of Giant Pulses from PSR J1824−2452A Knight, H. S.; Bailes, M.; Manchester, R. N. The Astrophysical Journal, Vol. 653, Issue 1 https://doi.org/10.1086/508253	journal	December 2006
A 1.4 GHz Arecibo Survey for Pulsars in Globular Clusters Hessels, J. W. T.; Ransom, S. M.; Stairs, I. H. The Astrophysical Journal, Vol. 670, Issue 1 https://doi.org/10.1086/521780	journal	November 2007
Twenty-One Millisecond Pulsars in Terzan 5 Using the Green Bank Telescope Ransom, S. M. Science, Vol. 307, Issue 5711 https://doi.org/10.1126/science.1108632	journal	February 2005
The radio luminosity distribution of pulsars in 47 Tucanae McConnell, D.; Deshpande, A. A.; Connors, T. Monthly Notices of the Royal Astronomical Society, Vol. 348, Issue 4 https://doi.org/10.1111/j.1365-2966.2004.07447.x	journal	March 2004
A Catalog of Parameters for Globular Clusters in the Milky Way Harris, William E. The Astronomical Journal, Vol. 112 https://doi.org/10.1086/118116	journal	October 1996
A Population of Gamma-Ray Millisecond Pulsars Seen with the Fermi Large Area Telescope Abdo, A. A.; Ackermann, M.; Ajello, M. Science, Vol. 325, Issue 5942 https://doi.org/10.1126/science.1176113	journal	July 2009
High-Resolution X-ray Imaging of a Globular Cluster Core: Compact Binaries in 47Tuc Grindlay, J. E. Science, Vol. 292, Issue 5525 https://doi.org/10.1126/science.1061135	journal	May 2001
Discovery of a quiescent neutron star binary in the globular cluster M 13 Gendre, B.; Barret, D.; Webb, N. Astronomy & Astrophysics, Vol. 403, Issue 1 https://doi.org/10.1051/0004-6361:20030423	journal	April 2003
The Age of the Inner Halo Globular Cluster NGC 6652 Chaboyer, Brian; Sarajedini, Ata; Armandroff, Taft E. The Astronomical Journal, Vol. 120, Issue 6 https://doi.org/10.1086/316884	journal	December 2000
A Search for Submillisecond Pulsars Edwards, R. T.; van Straten, W.; Bailes, M. The Astrophysical Journal, Vol. 560, Issue 1 https://doi.org/10.1086/322772	journal	October 2001

Cited By (36)

Galactic bulge preferred over dark matter for the Galactic centre gamma-ray excess Macias, Oscar; Gordon, Chris; Crocker, Roland M. Nature Astronomy, Vol. 2, Issue 5 https://doi.org/10.1038/s41550-018-0414-3	journal	March 2018
X-ray follow-up observations of the two γ -ray pulsars PSR J1459–6053 and PSR J1614–2230 Pancrazi, B.; Webb, N. A.; Becker, W. Astronomy & Astrophysics, Vol. 544 https://doi.org/10.1051/0004-6361/201117888	journal	August 2012
FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG Nolan, P. L.; Abdo, A. A.; Ackermann, M. The Astrophysical Journal Supplement Series, Vol. 199, Issue 2 https://doi.org/10.1088/0067-0049/199/2/31	journal	March 2012
THE SECOND FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS Abdo, A. A.; Ajello, M.; Allafort, A. The Astrophysical Journal Supplement Series, Vol. 208, Issue 2 https://doi.org/10.1088/0067-0049/208/2/17	journal	September 2013
Globular cluster interstellar media: ionized and ejected by white dwarfs McDonald, I.; Zijlstra, A. A. Monthly Notices of the Royal Astronomical Society, Vol. 446, Issue 3 https://doi.org/10.1093/mnras/stu2202	journal	November 2014
Gamma-ray and X-ray emission from the Galactic centre: hints on the nuclear star cluster formation history Arca-Sedda, Manuel; Kocsis, Bence; Brandt, Timothy D. Monthly Notices of the Royal Astronomical Society, Vol. 479, Issue 1 https://doi.org/10.1093/mnras/sty1454	journal	June 2018
A Deep X-ray Survey of the globular cluster Omega Centauri Henleywillis, Simon; Cool, Adrienne M.; Haggard, Daryl Monthly Notices of the Royal Astronomical Society, Vol. 479, Issue 2 https://doi.org/10.1093/mnras/sty675	journal	March 2018
Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22 Amato, R.; D’Aì, A.; Del Santo, M. Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 3 https://doi.org/10.1093/mnras/stz1100	journal	April 2019
Milky Way globular clusters in γ-rays: analysing the dynamical formation of millisecond pulsars de Menezes, Raniere; Cafardo, Fabio; Nemmen, Rodrigo Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 1 https://doi.org/10.1093/mnras/stz898	journal	March 2019
Pulsar-black hole binaries in the Galactic Centre: PSR-BH binaries in the Galactic Centre Faucher-Giguère, Claude-André; Loeb, Abraham Monthly Notices of the Royal Astronomical Society, Vol. 415, Issue 4 https://doi.org/10.1111/j.1365-2966.2011.19019.x	journal	June 2011
Luminosities of recycled radio pulsars in globular clusters: Recycled radio pulsars in globular clusters Bagchi, Manjari; Lorimer, D. R.; Chennamangalam, Jayanth Monthly Notices of the Royal Astronomical Society, Vol. 418, Issue 1 https://doi.org/10.1111/j.1365-2966.2011.19498.x	journal	September 2011
Millisecond Pulsar Origin of the Galactic Center Excess and Extended Gamma-Ray Emission from Andromeda: A Closer Look Eckner, Christopher; Hou, Xian; Serpico, Pasquale D. The Astrophysical Journal, Vol. 862, Issue 1 https://doi.org/10.3847/1538-4357/aac029	journal	July 2018
The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters Tremou, Evangelia; Strader, Jay; Chomiuk, Laura The Astrophysical Journal, Vol. 862, Issue 1 https://doi.org/10.3847/1538-4357/aac9b9	journal	July 2018
Population Syntheses of Millisecond Pulsars from the Galactic Disk and Bulge Gonthier, Peter L.; Harding, Alice K.; Ferrara, Elizabeth C. The Astrophysical Journal, Vol. 863, Issue 2 https://doi.org/10.3847/1538-4357/aad08d	journal	August 2018
Evidence for Cosmic-Ray Escape in the Small Magellanic Cloud Using Fermi Gamma Rays Lopez, Laura A.; Auchettl, Katie; Linden, Tim The Astrophysical Journal, Vol. 867, Issue 1 https://doi.org/10.3847/1538-4357/aae0f8	journal	October 2018
Probing the Pulsar Population of Terzan 5 via Spectral Modeling Ndiyavala, H.; Venter, C.; Johnson, T. J. The Astrophysical Journal, Vol. 880, Issue 1 https://doi.org/10.3847/1538-4357/ab24ca	journal	July 2019
Fermi Large Area Telescope Fourth Source Catalog Abdollahi, S.; Acero, F.; Ackermann, M. The Astrophysical Journal Supplement Series, Vol. 247, Issue 1 https://doi.org/10.3847/1538-4365/ab6bcb	journal	March 2020
Second Repeating FRB 180814.J0422+73: Ten-year Fermi -LAT Upper Limits and Implications Yang, Yu-Han; Zhang, Bin-Bin; Zhang, Bing The Astrophysical Journal, Vol. 875, Issue 2 https://doi.org/10.3847/2041-8213/ab13af	journal	April 2019
Discovery of Millisecond Pulsars in the Globular Cluster Omega Centauri Dai, Shi; Johnston, Simon; Kerr, Matthew The Astrophysical Journal, Vol. 888, Issue 2 https://doi.org/10.3847/2041-8213/ab621a	journal	January 2020
The Second Fermi Large area Telescope Catalog of Gamma-Ray Pulsars Abdo, A. A.; Ajello, M.; Allafort, A. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/desy-2014-00864	text	January 2013
Fermi Large Area Telescope Fourth Source Catalog Abdollahi, S.; Acero, F.; Ackermann, Markus Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-01400	text	January 2020
Galactic bulge preferred over dark matter for the Galactic centre gamma-ray excess Macias, Oscar; Gordon, Chris; Crocker, Roland M. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2018-02026	text	January 2018
Gamma-Ray And X-Ray Emission From The Galactic Centre: Hints On The Nuclear Star Cluster Formation History Arca-Sedda, Manuel; Kocsis, Bence; Brandt, Timothy Zenodo https://doi.org/10.5281/zenodo.1438361	text	January 2018
Fermi Large Area Telescope Fourth Source Catalog Abdollahi, S. IOP https://doi.org/10.13016/m2hfkt-y90r	collection	January 2020
Gamma-Ray And X-Ray Emission From The Galactic Centre: Hints On The Nuclear Star Cluster Formation History Arca-Sedda, Manuel; Kocsis, Bence; Brandt, Timothy Zenodo https://doi.org/10.5281/zenodo.1438362	text	January 2018
Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission Abazajian, Kevork N.; Kaplinghat, Manoj arXiv https://doi.org/10.48550/arxiv.1207.6047	text	January 2012
Stellar Encounter Rate in Galactic Globular Clusters Bahramian, Arash; Heinke, Craig O.; Sivakoff, Gregory R. arXiv https://doi.org/10.48550/arxiv.1302.2549	text	January 2013
Disrupted Globular Clusters Can Explain the Galactic Center Gamma Ray Excess Brandt, Timothy D.; Kocsis, Bence arXiv https://doi.org/10.48550/arxiv.1507.05616	text	January 2015
Radio detection prospects for a bulge population of millisecond pulsars as suggested by Fermi LAT observations of the inner Galaxy Calore, Francesca; Di Mauro, Mattia; Donato, Fiorenza arXiv https://doi.org/10.48550/arxiv.1512.06825	text	January 2015
Galactic Bulge Preferred Over Dark Matter for the Galactic Center Gamma-Ray Excess Macias, Oscar; Gordon, Chris; Crocker, Roland M. arXiv https://doi.org/10.48550/arxiv.1611.06644	text	January 2016
The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters Tremou, Evangelia; Strader, Jay; Chomiuk, Laura arXiv https://doi.org/10.48550/arxiv.1806.00259	text	January 2018
Population syntheses of millisecond pulsars from the Galactic Disk and Bulge Gonthier, Peter L.; Harding, Alice K.; Ferrara, Elizabeth C. arXiv https://doi.org/10.48550/arxiv.1806.11215	text	January 2018
Evidence for Cosmic-Ray Escape in the Small Magellanic Cloud using Fermi Gamma-rays Lopez, Laura A.; Auchettl, Katie; Linden, Tim arXiv https://doi.org/10.48550/arxiv.1807.06595	text	January 2018
Comment on "Understanding the $γ$-ray emission from the globular cluster 47 Tuc: evidence for dark matter?" Bartels, Richard; Edwards, Thomas arXiv https://doi.org/10.48550/arxiv.1807.08800	text	January 2018
Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22 Amato, R.; D'Aì, A.; Del Santo, M. arXiv https://doi.org/10.48550/arxiv.1904.07648	text	January 2019
Probing the pulsar population of Terzan 5 via spectral modeling Ndiyavala, Hambeleleni; Venter, Christo; Johnson, Tyrel J. arXiv https://doi.org/10.48550/arxiv.1905.10229	text	January 2019

Similar Records

Search for dark matter signals with Fermi-LAT observation of globular clusters NGC 6388 and M 15

Journal Article · Sun Apr 01 00:00:00 EDT 2012 · Journal of Cosmology and Astroparticle Physics · OSTI ID:1357510

Feng, Lei; Yuan, Qiang; Yin, Peng-Fei; +2 more

Multi-wavelength modeling of globular clusters–the millisecond pulsar scenario

Journal Article · Fri Dec 20 00:00:00 EST 2013 · Astrophysical Journal · OSTI ID:1357510

Kopp, A.; Venter, C.; Büsching, I.; +1 more

FERMI DISCOVERY OF GAMMA-RAY EMISSION FROM THE GLOBULAR CLUSTER TERZAN 5

Journal Article · Sat Mar 20 00:00:00 EDT 2010 · Astrophysical Journal Letters · OSTI ID:1357510

Kong, A K. H.; Hui, C Y

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS

Title: A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope

Citation Formats

References (46)

Cited By (36)

Similar Records

Related Subjects