Local H i emissivity measured with FERMI-LAT and implications for Cosmic-ray spectra

Casandjian, Jean -Marc

doi:10.1088/0004-637X/806/2/240

Title: Local H i emissivity measured with FERMI-LAT and implications for Cosmic-ray spectra

Journal Article · Sat Jun 20 00:00:00 EDT 2015 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.1088/0004-637X/806/2/240· OSTI ID:1355151

Casandjian, Jean -Marc ^[1]

CEA-IRFU/CNRS/Univ. Paris Diderot, Gif-sur-Yvette (France)

Cosmic-ray (CR) electrons and nuclei interact with the Galactic interstellar gas and produce high-energy γ-rays. The γ-ray emission rate per hydrogen atom, called emissivity, provides a unique indirect probe of the CR flux. We present the measurement and the interpretation of the emissivity in the solar neighborhood for γ-ray energy from 50 MeV to 50 GeV. We analyzed a subset of 4 yr of observations from the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope (Fermi) restricted to absolute latitudes $$10^\circ \lt | b| \lt 70^\circ $$. From a fit to the LAT data including atomic, molecular, and ionized hydrogen column density templates, as well as a dust optical depth map, we derived the emissivities, the molecular hydrogen–to–CO conversion factor $${X}_{\mathrm{CO}}=(0.902\pm 0.007)\times {10}^{20}$$ cm–2 (K km s–1)–1, and the dust-to-gas ratio $${X}_{\mathrm{DUST}}=(41.4\pm 0.3)\times {10}^{20}$$ cm–2 mag–1. Moreover, we detected for the first time γ-ray emission from ionized hydrogen. We compared the extracted emissivities to those calculated from γ-ray production cross sections and to CR spectra measured in the heliosphere. We observed that the experimental emissivities are reproduced only if the solar modulation is accounted for. This provides a direct detection of solar modulation observed previously through the anticorrelation between CR fluxes and solar activity. Lastly, we fitted a parameterized spectral form to the heliospheric CR observations and to the Fermi-LAT emissivity and obtained compatible local interstellar spectra for proton and helium kinetic energy per nucleon between between 1 and 100 GeV and for electron–positrons between 0.1 and 100 GeV.

View Accepted Manuscript (DOE)

Cite

Export

Save

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1355151

Journal Information:: The Astrophysical Journal (Online), Vol. 806, Issue 2; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 42 works

Citation information provided by
Web of Science

References (55)

FERMI LAT OBSERVATION OF DIFFUSE GAMMA RAYS PRODUCED THROUGH INTERACTIONS BETWEEN LOCAL INTERSTELLAR MATTER AND HIGH-ENERGY COSMIC RAYS Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal, Vol. 703, Issue 2 https://doi.org/10.1088/0004-637X/703/2/1249	journal	September 2009
FERMI OBSERVATIONS OF CASSIOPEIA AND CEPHEUS: DIFFUSE GAMMA-RAY EMISSION IN THE OUTER GALAXY Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal, Vol. 710, Issue 1 https://doi.org/10.1088/0004-637X/710/1/133	journal	January 2010
FERMI LARGE AREA TELESCOPE OBSERVATIONS OF TWO GAMMA-RAY EMISSION COMPONENTS FROM THE QUIESCENT SUN Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal, Vol. 734, Issue 2 https://doi.org/10.1088/0004-637X/734/2/116	journal	June 2011
FERMI OBSERVATIONS OF γ-RAY EMISSION FROM THE MOON Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal, Vol. 758, Issue 2 https://doi.org/10.1088/0004-637X/758/2/140	journal	October 2012
THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION Ackermann, M.; Ajello, M.; Albert, A. The Astrophysical Journal Supplement Series, Vol. 203, Issue 1 https://doi.org/10.1088/0067-0049/203/1/4	journal	October 2012
The cosmic-ray and gas content of the Cygnus region as measured in γ -rays by the Fermi Large Area Telescope Ackermann, M.; Ajello, M.; Allafort, A. Astronomy & Astrophysics, Vol. 538 https://doi.org/10.1051/0004-6361/201117539	journal	February 2012
FERMI LARGE AREA TELESCOPE STUDY OF COSMIC RAYS AND THE INTERSTELLAR MEDIUM IN NEARBY MOLECULAR CLOUDS Ackermann, M.; Ajello, M.; Allafort, A. The Astrophysical Journal, Vol. 755, Issue 1 https://doi.org/10.1088/0004-637X/755/1/22	journal	July 2012
GAMMA-RAY OBSERVATIONS OF THE ORION MOLECULAR CLOUDS WITH THE FERMI LARGE AREA TELESCOPE Ackermann, M.; Ajello, M.; Allafort, A. The Astrophysical Journal, Vol. 756, Issue 1 https://doi.org/10.1088/0004-637X/756/1/4	journal	August 2012
ERRATUM: “FERMI LARGE AREA TELESCOPE STUDY OF COSMIC-RAYS AND THE INTERSTELLAR MEDIUM IN NEARBY MOLECULAR CLOUDS” (2012, ApJ, 755, 22) Ackermann, M.; Ajello, M.; Allafort, A. The Astrophysical Journal, Vol. 778, Issue 1 https://doi.org/10.1088/0004-637X/778/1/82	journal	November 2013
FERMI -LAT OBSERVATIONS OF THE DIFFUSE γ-RAY EMISSION: IMPLICATIONS FOR COSMIC RAYS AND THE INTERSTELLAR MEDIUM Ackermann, M.; Ajello, M.; Atwood, W. B. The Astrophysical Journal, Vol. 750, Issue 1 https://doi.org/10.1088/0004-637X/750/1/3	journal	April 2012
CONSTRAINTS ON THE COSMIC-RAY DENSITY GRADIENT BEYOND THE SOLAR CIRCLE FROM FERMI γ-RAY OBSERVATIONS OF THE THIRD GALACTIC QUADRANT Ackermann, M.; Ajello, M.; Baldini, L. The Astrophysical Journal, Vol. 726, Issue 2 https://doi.org/10.1088/0004-637X/726/2/81	journal	December 2010
THE SPECTRUM AND MORPHOLOGY OF THE FERMI BUBBLES Ackermann, M.; Albert, A.; Atwood, W. B. The Astrophysical Journal, Vol. 793, Issue 1 https://doi.org/10.1088/0004-637X/793/1/64	journal	September 2014
Planck early results. XIX. All-sky temperature and dust optical depth from Planck and IRAS. Constraints on the “dark gas” in our Galaxy Ade, P. A. R.; Aghanim, N.; Arnaud, M. Astronomy & Astrophysics, Vol. 536 https://doi.org/10.1051/0004-6361/201116479	journal	December 2011
PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra Adriani, O.; Barbarino, G. C.; Bazilevskaya, G. A. Science, Vol. 332, Issue 6025 https://doi.org/10.1126/science.1199172	journal	March 2011
Inclusive particle production in 400 GeV/c pp-interactions Aguilar-Benitez, M.; Allison, W. W. W.; Batalov, A. A. Zeitschrift f�r Physik C Particles and Fields, Vol. 50, Issue 3 https://doi.org/10.1007/BF01551452	journal	September 1991
NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: FINAL MAPS AND RESULTS Bennett, C. L.; Larson, D.; Weiland, J. L. The Astrophysical Journal Supplement Series, Vol. 208, Issue 2 https://doi.org/10.1088/0067-0049/208/2/20	journal	September 2013
The Milky Way in Molecular Clouds: A New Complete CO Survey Dame, T. M.; Hartmann, Dap; Thaddeus, P. The Astrophysical Journal, Vol. 547, Issue 2 https://doi.org/10.1086/318388	journal	February 2001
The GeV-TeV Galactic gamma-ray diffuse emission: I. Uncertainties in the predictions of the hadronic component Delahaye, T.; Fiasson, A.; Pohl, M. Astronomy & Astrophysics, Vol. 531 https://doi.org/10.1051/0004-6361/201116647	journal	June 2011
Towards a free-free template for CMB foregrounds Dickinson, C.; Davies, R. D.; Davis, R. J. Monthly Notices of the Royal Astronomical Society, Vol. 341, Issue 2 https://doi.org/10.1046/j.1365-8711.2003.06439.x	journal	May 2003
EGRET Observations of the Diffuse Gamma‐Ray Emission in Orion: Analysis through Cycle 6 Digel, S. W.; Aprile, E.; Hunter, S. D. The Astrophysical Journal, Vol. 520, Issue 1 https://doi.org/10.1086/307455	journal	July 1999
High-energy gamma-ray results from the second small astronomy satellite Fichtel, C. E.; Hartman, R. C.; Kniffen, D. A. The Astrophysical Journal, Vol. 198 https://doi.org/10.1086/153590	journal	May 1975
Solar Modulation of Galactic Cosmic Rays Gleeson, L. J.; Axford, W. I. The Astrophysical Journal, Vol. 154 https://doi.org/10.1086/149822	journal	November 1968
HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere Gorski, K. M.; Hivon, E.; Banday, A. J. The Astrophysical Journal, Vol. 622, Issue 2 https://doi.org/10.1086/427976	journal	April 2005
Unveiling Extensive Clouds of Dark Gas in the Solar Neighborhood Grenier, I. A. Science, Vol. 307, Issue 5713 https://doi.org/10.1126/science.1106924	journal	February 2005
The Correlation Between Dispersion Measure and X-Ray Column Density from Radio Pulsars He, C.; Ng, C. -Y.; Kaspi, V. M. The Astrophysical Journal, Vol. 768, Issue 1 https://doi.org/10.1088/0004-637X/768/1/64	journal	April 2013
The Millennium Arecibo 21 Centimeter Absorption‐Line Survey. II. Properties of the Warm and Cold Neutral Media Heiles, Carl; Troland, T. H. The Astrophysical Journal, Vol. 586, Issue 2 https://doi.org/10.1086/367828	journal	April 2003
EGRET Observations of the Diffuse Gamma‐Ray Emission from the Galactic Plane Hunter, S. D.; Bertsch, D. L.; Catelli, J. R. The Astrophysical Journal, Vol. 481, Issue 1 https://doi.org/10.1086/304012	journal	May 1997
Nuclear Enhancement of the Photon Yield in Cosmic ray Interactions Kachelriess, Michael; Moskalenko, Igor V.; Ostapchenko, Sergey S. The Astrophysical Journal, Vol. 789, Issue 2 https://doi.org/10.1088/0004-637X/789/2/136	journal	June 2014
The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections Kalberla, P. M. W.; Burton, W. B.; Hartmann, Dap Astronomy & Astrophysics, Vol. 440, Issue 2 https://doi.org/10.1051/0004-6361:20041864	journal	September 2005
Diffractive Interaction and Scaling Violation in pp →π 0 Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET Kamae, Tuneyoshi; Abe, Toshinori; Koi, Tatsumi The Astrophysical Journal, Vol. 620, Issue 1 https://doi.org/10.1086/426935	journal	February 2005
Parameterization of \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $\gamma ,\, e^{\pm }$ \end{document} , and Neutrino Spectra Produced by p‐p Interaction in Astronomical Environments Kamae, Tuneyoshi; Karlsson, Niklas; Mizuno, Tsunefumi The Astrophysical Journal, Vol. 647, Issue 1 https://doi.org/10.1086/505189	journal	August 2006
An h i Column Density Threshold for cold gas Formation in the Galaxy Kanekar, N.; Braun, R.; Roy, N. The Astrophysical Journal, Vol. 737, Issue 2 https://doi.org/10.1088/2041-8205/737/2/L33	journal	August 2011
The relationship between the galactic matter distribution, cosmic-ray dynamics, and gamma-ray production Kniffen, D. A.; Fichtel, C. E.; Thompson, D. J. The Astrophysical Journal, Vol. 215 https://doi.org/10.1086/155411	journal	August 1977
High-Energy Cosmic Gamma-Ray Observations from the OSO-3 Satellite Kraushaar, W. L.; Clark, G. W.; Garmire, G. P. The Astrophysical Journal, Vol. 177 https://doi.org/10.1086/151713	journal	October 1972
The Likelihood Analysis of EGRET Data Mattox, J. R.; Bertsch, D. L.; Chiang, J. The Astrophysical Journal, Vol. 461 https://doi.org/10.1086/177068	journal	April 1996
Solar-stellar outer atmospheres and energetic particles, and galactic cosmic rays Meyer, J. -P. The Astrophysical Journal Supplement Series, Vol. 57 https://doi.org/10.1086/191001	journal	January 1985
A broadband study of galactic dust emission Paladini, R.; Montier, L.; Giard, M. Astronomy & Astrophysics, Vol. 465, Issue 3 https://doi.org/10.1051/0004-6361:20065835	journal	January 2007
Dark gas in the solar neighborhood from extinction data Paradis, D.; Dobashi, K.; Shimoikura, T. Astronomy & Astrophysics, Vol. 543 https://doi.org/10.1051/0004-6361/201118740	journal	July 2012
Inverse Compton Origin of the Hard X‐Ray and Soft Gamma‐Ray Emission from the Galactic Ridge Porter, Troy A.; Moskalenko, Igor V.; Strong, Andrew W. The Astrophysical Journal, Vol. 682, Issue 1 https://doi.org/10.1086/589615	journal	July 2008
Line integrals of N[SUB]E[/SUB] and (n[SUB]E)-squared[/SUB] at high Galactic latitude Reynolds, R. J. The Astrophysical Journal, Vol. 372 https://doi.org/10.1086/186013	journal	May 1991
Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds Schlegel, David J.; Finkbeiner, Douglas P.; Davis, Marc The Astrophysical Journal, Vol. 500, Issue 2 https://doi.org/10.1086/305772	journal	June 1998
Modelling the Galactic distribution of free electrons: The Galactic distribution of free electrons Schnitzeler, D. H. F. M. Monthly Notices of the Royal Astronomical Society, Vol. 427, Issue 1 https://doi.org/10.1111/j.1365-2966.2012.21869.x	journal	November 2012
On the Origins of the Diffuse hα Emission: Ionized gas or Dust-Scattered hα Halos? Seon, Kwang-Il; Witt, Adolf N. The Astrophysical Journal, Vol. 758, Issue 2 https://doi.org/10.1088/0004-637X/758/2/109	journal	October 2012
PYTHIA 6.4 physics and manual Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter Journal of High Energy Physics, Vol. 2006, Issue 05 https://doi.org/10.1088/1126-6708/2006/05/026	journal	May 2006
Dust energetics in the gas phases of the interstellar medium - The origin of the Galactic large-scale far-infrared emission observed by IRAS Sodroski, T. J.; Dwek, E.; Hauser, M. G. The Astrophysical Journal, Vol. 336 https://doi.org/10.1086/167048	journal	January 1989
A Three‐dimensional Decomposition of the Infrared Emission from Dust in the Milky Way Sodroski, T. J.; Odegard, N.; Arendt, R. G. The Astrophysical Journal, Vol. 480, Issue 1 https://doi.org/10.1086/303961	journal	May 1997
The cosmic ?-ray spectrum from secondary particle production in cosmic-ray interactions Stecker, F. W. Astrophysics and Space Science, Vol. 6, Issue 3 https://doi.org/10.1007/BF00653856	journal	March 1970
Production spectrum of gamma rays in interstellar space through neutral pion decay Stephens, S. A.; Badhwar, G. D. Astrophysics and Space Science, Vol. 76, Issue 1 https://doi.org/10.1007/BF00651256	journal	January 1981
GIANT GAMMA-RAY BUBBLES FROM FERMI -LAT: ACTIVE GALACTIC NUCLEUS ACTIVITY OR BIPOLAR GALACTIC WIND? Su, Meng; Slatyer, Tracy R.; Finkbeiner, Douglas P. The Astrophysical Journal, Vol. 724, Issue 2 https://doi.org/10.1088/0004-637X/724/2/1044	journal	November 2010
Radio observational constraints on Galactic 3D-emission models Sun, X. H.; Reich, W.; Waelkens, A. Astronomy & Astrophysics, Vol. 477, Issue 2 https://doi.org/10.1051/0004-6361:20078671	journal	November 2007
Calibration of the Energetic Gamma-Ray Experiment Telescope (EGRET) for the Compton Gamma-Ray Observatory Thompson, D. J.; Bertsch, D. L.; Fichtel, C. E. The Astrophysical Journal Supplement Series, Vol. 86 https://doi.org/10.1086/191793	journal	May 1993
Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers: COSMIC RAY MODULATION Usoskin, Ilya G.; Bazilevskaya, Galina A.; Kovaltsov, Gennady A. Journal of Geophysical Research: Space Physics, Vol. 116, Issue A2 https://doi.org/10.1029/2010JA016105	journal	February 2011
Limits on the interstellar cosmic ray electron spectrum below ∼1-2 GeV derived from the galactic polar radio spectrum and constrained by new Voyager 1 measurements: INTERSTELLAR COSMIC RAY ELECTRON SPECTRUM Webber, W. R.; Higbie, P. R. Journal of Geophysical Research: Space Physics, Vol. 113, Issue A11 https://doi.org/10.1029/2008JA013386	journal	November 2008
On the Origins of the High-Latitude hα Background Witt, Adolf N.; Gold, Benjamin; Barnes, Frank S. The Astrophysical Journal, Vol. 724, Issue 2 https://doi.org/10.1088/0004-637X/724/2/1551	journal	November 2010
Revisiting the radial distribution of pulsars in the Galaxy Yusifov, I.; Küçük, I. Astronomy & Astrophysics, Vol. 422, Issue 2 https://doi.org/10.1051/0004-6361:20040152	journal	July 2004

Cited By (17)

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
Cosmic rays, gas and dust in nearby anticentre clouds: I. CO-to-H Remy, Q.; Grenier, I. A.; Marshall, D. J. Astronomy & Astrophysics, Vol. 601 https://doi.org/10.1051/0004-6361/201629632	journal	May 2017
Exploring the shape of the γ -ray spectrum around the “ π ⁰ -bump” Yang, Rui-zhi; Kafexhiu, Ervin; Aharonian, Felix Astronomy & Astrophysics, Vol. 615 https://doi.org/10.1051/0004-6361/201730908	journal	July 2018
Hard and bright gamma-ray emission at the base of the Fermi bubbles Herold, L.; Malyshev, D. Astronomy & Astrophysics, Vol. 625 https://doi.org/10.1051/0004-6361/201834670	journal	May 2019
The cosmic-ray content of the Orion-Eridanus superbubble Joubaud, T.; Grenier, I. A.; Casandjian, J. M. Astronomy & Astrophysics, Vol. 635 https://doi.org/10.1051/0004-6361/201937205	journal	March 2020
On the progressive hardening of the cosmic-ray proton spectrum in the inner Galaxy Pothast, Mart; Gaggero, Daniele; Storm, Emma Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 10 https://doi.org/10.1088/1475-7516/2018/10/045	journal	October 2018
Imprints of cosmic rays in multifrequency observations of the interstellar emission Orlando, E. Monthly Notices of the Royal Astronomical Society, Vol. 475, Issue 2 https://doi.org/10.1093/mnras/stx3280	journal	December 2017
Gamma-Ray Emission from Molecular Clouds Generated by Penetrating Cosmic Rays Dogiel, V. A.; Chernyshov, D. O.; Ivlev, A. V. The Astrophysical Journal, Vol. 868, Issue 2 https://doi.org/10.3847/1538-4357/aae827	journal	November 2018
Fermi -LAT Observations of γ -Ray Emission toward the Outer Halo of M31 Karwin, Christopher M.; Murgia, Simona; Campbell, Sheldon The Astrophysical Journal, Vol. 880, Issue 2 https://doi.org/10.3847/1538-4357/ab2880	journal	July 2019
Fermi -LAT γ -Ray Study of the Interstellar Medium and Cosmic Rays in the Chamaeleon Molecular Cloud Complex: A Look at the Dark Gas as Optically Thick H i Hayashi, Katsuhiro; Mizuno, Tsunefumi; Fukui, Yasuo The Astrophysical Journal, Vol. 884, Issue 2 https://doi.org/10.3847/1538-4357/ab4351	journal	October 2019
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
Fermi-LAT Observations of Gamma-Ray Emission Towards the Outer Halo of M31 Karwin, Chris; Murgia, Simona; Campbell, Sheldon Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) https://doi.org/10.22323/1.358.0570	conference	July 2019
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
Imprints of Cosmic Rays in Multifrequency Observations of the Interstellar Emission Orlando, E. arXiv https://doi.org/10.48550/arxiv.1712.07127	text	January 2017
On the progressive hardening of the cosmic-ray proton spectrum in the inner Galaxy Pothast, Mart; Gaggero, Daniele; Storm, Emma arXiv https://doi.org/10.48550/arxiv.1807.04554	text	January 2018
Hard and bright gamma-ray emission at the base of the Fermi bubbles Herold, Laura; Malyshev, Dmitry arXiv https://doi.org/10.48550/arxiv.1904.01454	text	January 2019
The cosmic-ray content of the Orion-Eridanus superbubble Joubaud, T.; Grenier, I. A.; Casandjian, J. -M. arXiv https://doi.org/10.48550/arxiv.2001.10139	text	January 2020

Similar Records

Local H i emissivity measured with Fermi-LAT and implications for cosmic-ray spectra

Journal Article · Sat Jun 20 00:00:00 EDT 2015 · Astrophysical Journal · OSTI ID:1355151

Casandjian, Jean-Marc

Study of the Cosmic Rays and Interstellar Medium in Local H I Clouds Using Fermi-LAT Gamma-Ray Observations

Journal Article · Wed Feb 19 00:00:00 EST 2020 · The Astrophysical Journal (Online) · OSTI ID:1355151

Mizuno, T.; Abdollahi, S.; Fukui, Y.; +5 more

Gas and Cosmic-Ray Properties in the MBM 53, 54, and 55 Molecular Clouds and the Pegasus Loops Revealed by H i Line Profiles, Dust, and Gamma-Ray Data

Journal Article · Fri Aug 19 00:00:00 EDT 2022 · The Astrophysical Journal · OSTI ID:1355151

Mizuno, T.; Hayashi, K.; Metzger, J.; +4 more

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
cosmic rays
gamma rays: diffuse background
gamma rays: ISM

Title: Local H i emissivity measured with FERMI-LAT and implications for Cosmic-ray spectra

Citation Formats

References (55)

Cited By (17)

Similar Records

Related Subjects