FERMI LAT Discovery of Extended Gamma-Ray Emission in the Direction of Supernova Remnant W51C
Abstract
In this paper, the discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. W51C is a middle-aged remnant (~104 yr) with intense radio synchrotron emission in its shell and known to be interacting with a molecular cloud. The gamma-ray emission is spatially extended, broadly consistent with the radio and X-ray extent of SNR W51C. The energy spectrum in the 0.2-50 GeV band exhibits steepening toward high energies. The luminosity is greater than 1 × 1036 erg s–1 given the distance constraint of D > 5.5 kpc, which makes this object one of the most luminous gamma-ray sources in our Galaxy. The observed gamma-rays can be explained reasonably by a combination of efficient acceleration of nuclear cosmic rays at supernova shocks and shock-cloud interactions. The decay of neutral π mesons produced in hadronic collisions provides a plausible explanation for the gamma-ray emission. The product of the average gas density and the total energy content of the accelerated protons amounts to $$\bar{n}_{\rm H}W_p \simeq 5\times 10^{51}\ (D/6\ {\rm kpc})^2\ \rm erg\ cm^{-3}$$. Electron density constraints from the radio and X-ray bands render it difficult to explainmore »
- Authors:
- more »
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- Fermi-LAT Collaboration
- OSTI Identifier:
- 1357434
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- The Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 706; Journal Issue: 1; Journal ID: ISSN 0004-637X
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; acceleration of particles; ISM: individual(W51C); radiation mechanisms: non-thermal
Citation Formats
Abdo, A. A., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Çelik, Ö., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cominsky, L. R., Conrad, J., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Dormody, M., do Couto e Silva, E., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giavitto, G., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Hughes, R. E., Jackson, M. S., Jóhannesson, G., Johnson, A. S., Johnson, T. J., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Katsuta, J., Kawai, N., Kerr, M., Knödlseder, J., Kocian, M. L., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Makeev, A., Mazziotta, M. N., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Rodriguez, A. Y., Romani, R. W., Roth, M., Ryde, F., Sadrozinski, H. F. -W., Sanchez, D., Sander, A., Saz Parkinson, P. M., Scargle, J. D., Schalk, T. L., Sgrò, C., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tibolla, O., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Venter, C., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yamazaki, R., Ylinen, T., and Ziegler, M. FERMI LAT Discovery of Extended Gamma-Ray Emission in the Direction of Supernova Remnant W51C. United States: N. p., 2009.
Web. doi:10.1088/0004-637X/706/1/L1.
Abdo, A. A., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Çelik, Ö., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cominsky, L. R., Conrad, J., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Dormody, M., do Couto e Silva, E., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giavitto, G., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Hughes, R. E., Jackson, M. S., Jóhannesson, G., Johnson, A. S., Johnson, T. J., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Katsuta, J., Kawai, N., Kerr, M., Knödlseder, J., Kocian, M. L., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Makeev, A., Mazziotta, M. N., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Rodriguez, A. Y., Romani, R. W., Roth, M., Ryde, F., Sadrozinski, H. F. -W., Sanchez, D., Sander, A., Saz Parkinson, P. M., Scargle, J. D., Schalk, T. L., Sgrò, C., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tibolla, O., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Venter, C., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yamazaki, R., Ylinen, T., & Ziegler, M. FERMI LAT Discovery of Extended Gamma-Ray Emission in the Direction of Supernova Remnant W51C. United States. https://doi.org/10.1088/0004-637X/706/1/L1
Abdo, A. A., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Çelik, Ö., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cominsky, L. R., Conrad, J., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Dormody, M., do Couto e Silva, E., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giavitto, G., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Hughes, R. E., Jackson, M. S., Jóhannesson, G., Johnson, A. S., Johnson, T. J., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Katsuta, J., Kawai, N., Kerr, M., Knödlseder, J., Kocian, M. L., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Makeev, A., Mazziotta, M. N., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Rodriguez, A. Y., Romani, R. W., Roth, M., Ryde, F., Sadrozinski, H. F. -W., Sanchez, D., Sander, A., Saz Parkinson, P. M., Scargle, J. D., Schalk, T. L., Sgrò, C., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tibolla, O., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Venter, C., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yamazaki, R., Ylinen, T., and Ziegler, M. 2009.
"FERMI LAT Discovery of Extended Gamma-Ray Emission in the Direction of Supernova Remnant W51C". United States. https://doi.org/10.1088/0004-637X/706/1/L1. https://www.osti.gov/servlets/purl/1357434.
@article{osti_1357434,
title = {FERMI LAT Discovery of Extended Gamma-Ray Emission in the Direction of Supernova Remnant W51C},
author = {Abdo, A. A. and Ackermann, M. and Ajello, M. and Baldini, L. and Ballet, J. and Barbiellini, G. and Baring, M. G. and Bastieri, D. and Baughman, B. M. and Bechtol, K. and Bellazzini, R. and Berenji, B. and Blandford, R. D. and Bloom, E. D. and Bonamente, E. and Borgland, A. W. and Bouvier, A. and Bregeon, J. and Brez, A. and Brigida, M. and Bruel, P. and Burnett, T. H. and Buson, S. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Casandjian, J. M. and Cecchi, C. and Çelik, Ö. and Chekhtman, A. and Cheung, C. C. and Chiang, J. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Cominsky, L. R. and Conrad, J. and Cutini, S. and Dermer, C. D. and de Angelis, A. and de Palma, F. and Digel, S. W. and Dormody, M. and do Couto e Silva, E. and Drell, P. S. and Dubois, R. and Dumora, D. and Farnier, C. and Favuzzi, C. and Fegan, S. J. and Focke, W. B. and Fortin, P. and Frailis, M. and Fukazawa, Y. and Funk, S. and Fusco, P. and Gargano, F. and Gasparrini, D. and Gehrels, N. and Germani, S. and Giavitto, G. and Giebels, B. and Giglietto, N. and Giordano, F. and Glanzman, T. and Godfrey, G. and Grenier, I. A. and Grondin, M. -H. and Grove, J. E. and Guillemot, L. and Guiriec, S. and Hanabata, Y. and Harding, A. K. and Hayashida, M. and Hays, E. and Hughes, R. E. and Jackson, M. S. and Jóhannesson, G. and Johnson, A. S. and Johnson, T. J. and Johnson, W. N. and Kamae, T. and Katagiri, H. and Kataoka, J. and Katsuta, J. and Kawai, N. and Kerr, M. and Knödlseder, J. and Kocian, M. L. and Kuss, M. and Lande, J. and Latronico, L. and Lemoine-Goumard, M. and Longo, F. and Loparco, F. and Lott, B. and Lovellette, M. N. and Lubrano, P. and Makeev, A. and Mazziotta, M. N. and McEnery, J. E. and Meurer, C. and Michelson, P. F. and Mitthumsiri, W. and Mizuno, T. and Moiseev, A. A. and Monte, C. and Monzani, M. E. and Morselli, A. and Moskalenko, I. V. and Murgia, S. and Nakamori, T. and Nolan, P. L. and Norris, J. P. and Nuss, E. and Ohsugi, T. and Okumura, A. and Omodei, N. and Orlando, E. and Ormes, J. F. and Paneque, D. and Parent, D. and Pelassa, V. and Pepe, M. and Pesce-Rollins, M. and Piron, F. and Porter, T. A. and Rainò, S. and Rando, R. and Razzano, M. and Reimer, A. and Reimer, O. and Reposeur, T. and Ritz, S. and Rodriguez, A. Y. and Romani, R. W. and Roth, M. and Ryde, F. and Sadrozinski, H. F. -W. and Sanchez, D. and Sander, A. and Saz Parkinson, P. M. and Scargle, J. D. and Schalk, T. L. and Sgrò, C. and Siskind, E. J. and Smith, D. A. and Smith, P. D. and Spandre, G. and Spinelli, P. and Strickman, M. S. and Suson, D. J. and Tajima, H. and Takahashi, H. and Takahashi, T. and Tanaka, T. and Thayer, J. B. and Thayer, J. G. and Thompson, D. J. and Tibaldo, L. and Tibolla, O. and Torres, D. F. and Tosti, G. and Tramacere, A. and Uchiyama, Y. and Usher, T. L. and Vasileiou, V. and Venter, C. and Vilchez, N. and Vitale, V. and Waite, A. P. and Wang, P. and Winer, B. L. and Wood, K. S. and Yamazaki, R. and Ylinen, T. and Ziegler, M.},
abstractNote = {In this paper, the discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. W51C is a middle-aged remnant (~104 yr) with intense radio synchrotron emission in its shell and known to be interacting with a molecular cloud. The gamma-ray emission is spatially extended, broadly consistent with the radio and X-ray extent of SNR W51C. The energy spectrum in the 0.2-50 GeV band exhibits steepening toward high energies. The luminosity is greater than 1 × 1036 erg s–1 given the distance constraint of D > 5.5 kpc, which makes this object one of the most luminous gamma-ray sources in our Galaxy. The observed gamma-rays can be explained reasonably by a combination of efficient acceleration of nuclear cosmic rays at supernova shocks and shock-cloud interactions. The decay of neutral π mesons produced in hadronic collisions provides a plausible explanation for the gamma-ray emission. The product of the average gas density and the total energy content of the accelerated protons amounts to $\bar{n}_{\rm H}W_p \simeq 5\times 10^{51}\ (D/6\ {\rm kpc})^2\ \rm erg\ cm^{-3}$. Electron density constraints from the radio and X-ray bands render it difficult to explain the LAT signal as due to inverse Compton scattering. Finally, the Fermi LAT source coincident with SNR W51C sheds new light on the origin of Galactic cosmic rays.},
doi = {10.1088/0004-637X/706/1/L1},
url = {https://www.osti.gov/biblio/1357434},
journal = {The Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 706,
place = {United States},
year = {Tue Oct 27 00:00:00 EDT 2009},
month = {Tue Oct 27 00:00:00 EDT 2009}
}
Web of Science
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- The Astrophysical Journal Supplement Series, Vol. 218, Issue 2
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud
journal, November 2015
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- Monthly Notices of the Royal Astronomical Society, Vol. 455, Issue 2
Searching for the possible signal of the photon-axionlike particle oscillation in the combined GeV and TeV spectra of supernova remnants
journal, December 2019
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Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays
journal, August 2012
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On the nature of the TeV emission from the supernova remnant SN 1006: On the nature of the TeV emission from SNR
journal, September 2012
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journal, October 2012
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Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
journal, February 2013
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- Science, Vol. 339, Issue 6121
Fermi – LARGE AREA TELESCOPE: ACCOMPLISHMENTS AND CHALLENGES
journal, January 2013
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- Modern Physics Letters A, Vol. 28, Issue 02
Recombining Plasma and Gamma-Ray Emission in the Mixed-morphology Supernova Remnant 3C 400.2
journal, June 2017
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Evolutionary Models for 15 Galactic Supernova Remnants with New Distances
journal, October 2018
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Evolution of High-energy Particle Distribution in Supernova Remnants
journal, March 2019
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Bell-instability-mediated Spectral Modulation of Hadronic Gamma-Rays from a Supernova Remnant Interacting with a Molecular Cloud
journal, February 2019
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The GeV Emission in the Field of the Star-forming Region W30 Revisited
journal, August 2019
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- The Astrophysical Journal, Vol. 881, Issue 2
3FHL: The Third Catalog of Hard Fermi -LAT Sources
journal, September 2017
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- The Astrophysical Journal Supplement Series, Vol. 232, Issue 2
Fermi Large Area Telescope Fourth Source Catalog
journal, March 2020
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- The Astrophysical Journal Supplement Series, Vol. 247, Issue 1
Observational Signatures of Particle Acceleration in Supernova Remnants
book, January 2012
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- Particle Acceleration in Cosmic Plasmas
Fermi – LARGE AREA TELESCOPE: ACCOMPLISHMENTS AND CHALLENGES
conference, February 2013
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- Proceedings of the First LeCosPA Symposium, Towards Ultimate Understanding of the Universe
The origin of galactic cosmic rays
journal, June 2014
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- International Journal of Modern Physics D, Vol. 23, Issue 07
The Second Fermi Large area Telescope Catalog of Gamma-Ray Pulsars
text, January 2013
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- Deutsches Elektronen-Synchrotron, DESY, Hamburg
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud
text, January 2016
- Zdziarski, A. A.; Malyshev, D.; De Ona Wilhelmi, E.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Fermi Large Area Telescope Fourth Source Catalog
text, January 2020
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- Deutsches Elektronen-Synchrotron, DESY, Hamburg
The origin of galactic cosmic rays
journal, November 2013
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- The Astronomy and Astrophysics Review, Vol. 21, Issue 1
Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
text, January 2013
- Ackermann, Markus; Ajello, M.; Allafort, A.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
3FHL: The Third Catalog of Hard Fermi -LAT Sources
text, January 2017
- Ajello, M.; Atwood, W. B.; Baldini, L.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Supernova Remnants Interacting with Molecular Clouds: X-Ray and Gamma-Ray Signatures
book, January 2016
- Slane, Patrick; Bykov, Andrei; Ellison, Donald C.
- Multi-scale Structure Formation and Dynamics in Cosmic Plasmas, 187–210
The Diffuse Gamma-ray Background from Type Ia Supernovae
text, January 2012
- Lien, Amy; Fields, Brian D.
- arXiv
Observational signatures of particle acceleration in supernova remnants
text, January 2012
- Helder, E. A.; Vink, J.; Bykov, A. M.
- arXiv
Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays
text, January 2012
- Dermer, Charles D.
- arXiv
Recombining Plasma in the Gamma-ray Emitting Mixed-Morphology Supernova Remnant 3C 391
text, January 2014
- Ergin, Tülün; Sezer, Aytap; Saha, Lab
- arXiv
Supernova Remnants Interacting with Molecular Clouds: X-ray and Gamma-ray Signatures
text, January 2014
- Slane, P.; Bykov, A.; Ellison, D. C.
- arXiv
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud
text, January 2015
- Zdziarski, Andrzej A.; Malyshev, Denys; Wilhelmi, Emma de Ona
- arXiv
The supernova remnant W49B as seen with H.E.S.S. and Fermi-LAT
text, January 2016
- Collaboration, H. E. S. S.; Abdalla, H.; Abramowski, A.
- arXiv
Evolution of high-energy particle distribution in Supernova Remnants
text, January 2018
- Zeng, Houdun; Xin, Yuliang; Liu, Siming
- arXiv
The GeV emission in the field of the star-forming region W30 revisited
text, January 2019
- Liu, Bing; Yang, Rui-zhi; Sun, Xiao-na
- arXiv