An In-depth Study of Gamma Rays from the Starburst Galaxy M82 with VERITAS

Acharyya, Atreya; Furniss, Amy; VERITAS Collaboration; Saha, Lab; Splettstoesser, Megan; Maier, Gernot; Reynolds, Paul T.; Ribeiro, Deivid; Holder, Jamie; Kieda, David; Falcone, Abe; Bartkoske, Joshua T.; Santander, Marcos; Ragan, Kenneth J.; Mukherjee, Reshmi; Benbow, Wystan; Williams, David A.; Tak, D.; Jin, Weidong; Errando, Manel; Adams, Colin B.; Lang, Mark J.; Roache, Emmet; Sadeh, Iftach; Godoy, Miguel E.; Kleiner, Tobias K.; Lundy, Matthew; Shang, Ruo; Hinrichs, Claire E.; Rabinowitz, Pazit L.; Humensky, Thomas B.; Vassiliev, Vladimir V.; Bangale, Priyadarshini; Kaaret, Philip; Tucci, James V.; Krennrich, Frank; Quinn, John; Brien, Stephan Ó.; Mooney, Connor L.; Chromey, Alisha J.; Duerr, Anne; Hanlon, William; Foote, Juniper; Feldman, Sydney; Hervet, Olivier; Woo, Jooyun; Ning, Wenmeng; Hanna, David; Korzoun, Nikolas; Chen, Yu; Millard, Matthew J.; Johnson, Madalyn N.; Ong, Rene A.; Pueschel, Elisa; Pohl, Martin; Christiansen, Jodi L.; Moriarty, Patrick; Buckley, J. H.; Kherlakian, Maria; Talluri, Anjana K.; Kumar, Sajan; Sembroski, Glenn H.; Wong, Samantha L.; Kertzman, Mary; Feng, Qi; Fortson, Lucy

doi:10.3847/1538-4357/adab71

Items
Marc 21

001			640718
005			20251119161952.0
024	7	_	\|a 10.3847/1538-4357/adab71 \|2 doi
024	7	_	\|a VERITAS:2025jtu \|2 INSPIRETeX
024	7	_	\|a inspire:2870393 \|2 inspire
024	7	_	\|a 0004-637X \|2 ISSN
024	7	_	\|a 1538-4357 \|2 ISSN
024	7	_	\|a arXiv:2501.09998 \|2 arXiv
024	7	_	\|a 10.3204/PUBDB-2025-04857 \|2 datacite_doi
024	7	_	\|a openalex:W4408246826 \|2 openalex
037	_	_	\|a PUBDB-2025-04857
041	_	_	\|a English
082	_	_	\|a 520
088	_	_	\|a arXiv:2501.09998 \|2 arXiv
088	_	_	\|a arXiv:2501.09998 \|2 arXiv
100	1	_	\|a Acharyya, Atreya \|0 0000-0002-2028-9230 \|b 0
245	_	_	\|a An In-depth Study of Gamma Rays from the Starburst Galaxy M82 with VERITAS
260	_	_	\|a London \|c 2025 \|b Institute of Physics Publ.
336	7	_	\|a article \|2 DRIVER
336	7	_	\|a Output Types/Journal article \|2 DataCite
336	7	_	\|a Journal Article \|b journal \|m journal \|0 PUB:(DE-HGF)16 \|s 1763113294_1510030 \|2 PUB:(DE-HGF)
336	7	_	\|a ARTICLE \|2 BibTeX
336	7	_	\|a JOURNAL_ARTICLE \|2 ORCID
336	7	_	\|a Journal Article \|0 0 \|2 EndNote
500	_	_	\|a 15 pages, 7 figures; Accepted for the publication in The Astrophysical Journal (ApJ)
520	_	_	\|a Assuming Galactic cosmic rays originate in supernovae and the winds of massive stars, starburst galaxies should produce very-high-energy (VHE; E > 100 GeV) gamma-ray emission via the interaction of their copious quantities of cosmic rays with the large reservoirs of dense gas within the galaxies. Such VHE emission was detected by VERITAS from the starburst galaxy M82 in 2008–09. An extensive, multiyear campaign followed these initial observations, yielding a total of 254 hr of good-quality VERITAS data on M82. Leveraging modern analysis techniques and the larger exposure, these VERITAS data show a more statistically significant VHE signal (∼6.5 standard deviations, σ). The corresponding photon spectrum is well fit by a power law (Γ = 2.3 ± 0.3$_{stat}$ ± 0.2$_{sys}$), and the observed integral flux is F (>450 GeV) = (3.2 ± 0.6$_{stat}$ ± 0.6$_{sys}$) × 10$^{−13}$ cm$^{−2}$ s$^{−1}$, or ∼0.4% of the Crab Nebula flux above the same energy threshold. The improved VERITAS measurements, when combined with various multiwavelength data, enable modeling of the underlying emission and transport processes. A purely leptonic scenario is found to be a poor representation of the gamma-ray spectral energy distribution (SED). A lepto-hadronic scenario with cosmic rays following a power-law spectrum in momentum (index s ≃ 2.25) and with significant bremsstrahlung below 1 GeV provides a good match to the observed SED. The synchrotron emission from the secondary electrons indicates that efficient nonradiative losses of cosmic-ray electrons may be related to advective escape from the starburst core.
536	_	_	\|a 613 - Matter and Radiation from the Universe (POF4-613) \|0 G:(DE-HGF)POF4-613 \|c POF4-613 \|f POF IV \|x 0
588	_	_	\|a Dataset connected to CrossRef, Journals: bib-pubdb1.desy.de
693	_	_	\|0 EXP:(DE-H253)VERITAS-20170101 \|5 EXP:(DE-H253)VERITAS-20170101 \|e Very Energetic Radiation Imaging Telescope Array System \|x 0
700	1	_	\|a Adams, Colin B. \|0 0000-0002-9021-6192 \|b 1
700	1	_	\|a Bangale, Priyadarshini \|0 0000-0002-3886-3739 \|b 2
700	1	_	\|a Bartkoske, Joshua T. \|0 0000-0002-9675-7328 \|b 3
700	1	_	\|a Benbow, Wystan \|0 0000-0003-2098-170X \|b 4
700	1	_	\|a Buckley, J. H. \|0 0000-0001-6391-9661 \|b 5
700	1	_	\|a Chen, Yu \|b 6
700	1	_	\|a Christiansen, Jodi L. \|b 7
700	1	_	\|a Chromey, Alisha J. \|b 8
700	1	_	\|a Duerr, Anne \|0 0000-0003-1716-4119 \|b 9
700	1	_	\|a Errando, Manel \|0 0000-0002-1853-863X \|b 10
700	1	_	\|a Godoy, Miguel E. \|b 11
700	1	_	\|a Falcone, Abe \|0 0000-0002-5068-7344 \|b 12
700	1	_	\|a Feldman, Sydney \|b 13
700	1	_	\|a Feng, Qi \|b 14
700	1	_	\|a Foote, Juniper \|0 0000-0002-2944-6060 \|b 15
700	1	_	\|a Fortson, Lucy \|0 0000-0002-1067-8558 \|b 16
700	1	_	\|a Furniss, Amy \|0 0000-0003-1614-1273 \|b 17
700	1	_	\|a Hanlon, William \|0 0000-0002-0109-4737 \|b 18
700	1	_	\|a Hanna, David \|0 0000-0002-8513-5603 \|b 19
700	1	_	\|a Hervet, Olivier \|0 0000-0003-3878-1677 \|b 20
700	1	_	\|a Hinrichs, Claire E. \|0 0000-0001-6951-2299 \|b 21
700	1	_	\|a Holder, Jamie \|0 0000-0002-6833-0474 \|b 22
700	1	_	\|a Humensky, Thomas B. \|0 0000-0002-1432-7771 \|b 23
700	1	_	\|a Jin, Weidong \|0 0000-0002-1089-1754 \|b 24
700	1	_	\|a Johnson, Madalyn N. \|0 0009-0008-2688-0815 \|b 25
700	1	_	\|a Kaaret, Philip \|0 0000-0002-3638-0637 \|b 26
700	1	_	\|a Kertzman, Mary \|b 27
700	1	_	\|a Kherlakian, Maria \|b 28
700	1	_	\|a Kieda, David \|0 0000-0003-4785-0101 \|b 29
700	1	_	\|a Kleiner, Tobias K. \|0 P:(DE-H253)PIP1093214 \|b 30
700	1	_	\|a Korzoun, Nikolas \|b 31
700	1	_	\|a Krennrich, Frank \|b 32
700	1	_	\|a Kumar, Sajan \|b 33
700	1	_	\|a Lang, Mark J. \|0 0000-0003-4641-4201 \|b 34
700	1	_	\|a Lundy, Matthew \|0 0000-0003-3802-1619 \|b 35
700	1	_	\|a Maier, Gernot \|0 P:(DE-H253)PIP1011664 \|b 36
700	1	_	\|a Millard, Matthew J. \|0 0000-0001-7106-8502 \|b 37
700	1	_	\|a Mooney, Connor L. \|0 0000-0001-5937-446X \|b 38
700	1	_	\|a Moriarty, Patrick \|0 0000-0002-1499-2667 \|b 39
700	1	_	\|a Mukherjee, Reshmi \|0 0000-0002-3223-0754 \|b 40
700	1	_	\|a Ning, Wenmeng \|0 0000-0002-6121-3443 \|b 41
700	1	_	\|a Brien, Stephan Ó. \|0 0000-0002-9296-2981 \|b 42
700	1	_	\|a Ong, Rene A. \|0 0000-0002-4837-5253 \|b 43
700	1	_	\|a Pohl, Martin \|0 P:(DE-H253)PIP1010085 \|b 44
700	1	_	\|a Pueschel, Elisa \|0 P:(DE-H253)PIP1031007 \|b 45
700	1	_	\|a Quinn, John \|0 0000-0002-4855-2694 \|b 46
700	1	_	\|a Rabinowitz, Pazit L. \|b 47
700	1	_	\|a Ragan, Kenneth J. \|b 48
700	1	_	\|a Reynolds, Paul T. \|b 49
700	1	_	\|a Ribeiro, Deivid \|0 0000-0002-7523-7366 \|b 50
700	1	_	\|a Roache, Emmet \|b 51
700	1	_	\|a Sadeh, Iftach \|0 P:(DE-H253)PIP1006066 \|b 52
700	1	_	\|a Saha, Lab \|0 0000-0002-3171-5039 \|b 53
700	1	_	\|a Santander, Marcos \|0 0000-0001-7297-8217 \|b 54
700	1	_	\|a Sembroski, Glenn H. \|b 55
700	1	_	\|a Shang, Ruo \|0 0000-0002-9856-989X \|b 56
700	1	_	\|a Splettstoesser, Megan \|0 0000-0003-3407-9936 \|b 57
700	1	_	\|a Tak, D. \|b 58
700	1	_	\|a Talluri, Anjana K. \|b 59
700	1	_	\|a Tucci, James V. \|b 60
700	1	_	\|a Vassiliev, Vladimir V. \|b 61
700	1	_	\|a Williams, David A. \|0 0000-0003-2740-9714 \|b 62
700	1	_	\|a Wong, Samantha L. \|0 0000-0002-2730-2733 \|b 63
700	1	_	\|a Woo, Jooyun \|0 0009-0001-6471-1405 \|b 64
700	1	_	\|a VERITAS Collaboration \|0 P:(DE-HGF)0 \|b 65 \|e Collaboration author
773	_	_	\|a 10.3847/1538-4357/adab71 \|g Vol. 981, no. 2, p. 189 - \|0 PERI:(DE-600)1473835-1 \|n 2 \|p 189 \|t The astrophysical journal / Part 1 \|v 981 \|y 2025 \|x 0004-637X
787	0	_	\|a Acharyya, Atreya et.al. \|d London : Institute of Physics Publ., 2025 \|i IsParent \|0 PUBDB-2025-04905 \|r arXiv:2501.09998 \|t An In-depth Study of Gamma Rays from the Starburst Galaxy M82 with VERITAS
856	4	_	\|y OpenAccess \|u https://bib-pubdb1.desy.de/record/640718/files/Acharyya_2025_ApJ_981_189.pdf
856	4	_	\|y OpenAccess \|x pdfa \|u https://bib-pubdb1.desy.de/record/640718/files/Acharyya_2025_ApJ_981_189.pdf?subformat=pdfa
909	C	O	\|o oai:bib-pubdb1.desy.de:640718 \|p openaire \|p open_access \|p VDB \|p driver \|p dnbdelivery
910	1	_	\|a Deutsches Elektronen-Synchrotron \|0 I:(DE-588b)2008985-5 \|k DESY \|b 30 \|6 P:(DE-H253)PIP1093214
910	1	_	\|a Deutsches Elektronen-Synchrotron \|0 I:(DE-588b)2008985-5 \|k DESY \|b 36 \|6 P:(DE-H253)PIP1011664
910	1	_	\|a Deutsches Elektronen-Synchrotron \|0 I:(DE-588b)2008985-5 \|k DESY \|b 44 \|6 P:(DE-H253)PIP1010085
910	1	_	\|a Deutsches Elektronen-Synchrotron \|0 I:(DE-588b)2008985-5 \|k DESY \|b 45 \|6 P:(DE-H253)PIP1031007
910	1	_	\|a Deutsches Elektronen-Synchrotron \|0 I:(DE-588b)2008985-5 \|k DESY \|b 52 \|6 P:(DE-H253)PIP1006066
913	1	_	\|a DE-HGF \|b Forschungsbereich Materie \|l Matter and the Universe \|1 G:(DE-HGF)POF4-610 \|0 G:(DE-HGF)POF4-613 \|3 G:(DE-HGF)POF4 \|2 G:(DE-HGF)POF4-600 \|4 G:(DE-HGF)POF \|v Matter and Radiation from the Universe \|x 0
914	1	_	\|y 2025
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0200 \|2 StatID \|b SCOPUS \|d 2024-12-11
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0300 \|2 StatID \|b Medline \|d 2024-12-11
915	_	_	\|a Creative Commons Attribution CC BY 4.0 \|0 LIC:(DE-HGF)CCBY4 \|2 HGFVOC
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0600 \|2 StatID \|b Ebsco Academic Search \|d 2024-12-11
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)1150 \|2 StatID \|b Current Contents - Physical, Chemical and Earth Sciences \|d 2024-12-11
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0501 \|2 StatID \|b DOAJ Seal \|d 2024-04-03T10:32:32Z
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0500 \|2 StatID \|b DOAJ \|d 2024-04-03T10:32:32Z
915	_	_	\|a WoS \|0 StatID:(DE-HGF)0113 \|2 StatID \|b Science Citation Index Expanded \|d 2024-12-11
915	_	_	\|a Fees \|0 StatID:(DE-HGF)0700 \|2 StatID \|d 2024-12-11
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0150 \|2 StatID \|b Web of Science Core Collection \|d 2024-12-11
915	_	_	\|a IF < 5 \|0 StatID:(DE-HGF)9900 \|2 StatID \|d 2024-12-11
915	_	_	\|a OpenAccess \|0 StatID:(DE-HGF)0510 \|2 StatID
915	_	_	\|a Peer Review \|0 StatID:(DE-HGF)0030 \|2 StatID \|b DOAJ : Peer review, Anonymous peer review, Double anonymous peer review \|d 2024-04-03T10:32:32Z
915	_	_	\|a Article Processing Charges \|0 StatID:(DE-HGF)0561 \|2 StatID \|d 2024-12-11
915	_	_	\|a JCR \|0 StatID:(DE-HGF)0100 \|2 StatID \|b ASTROPHYS J : 2022 \|d 2024-12-11
915	_	_	\|a No Peer Review \|0 StatID:(DE-HGF)0020 \|2 StatID \|b ASC \|d 2024-12-11
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0160 \|2 StatID \|b Essential Science Indicators \|d 2024-12-11
915	_	_	\|a DBCoverage \|0 StatID:(DE-HGF)0199 \|2 StatID \|b Clarivate Analytics Master Journal List \|d 2024-12-11
920	1	_	\|0 I:(DE-H253)Z_VER-20210408 \|k Z_VER \|l VERITAS \|x 0
980	_	_	\|a journal
980	_	_	\|a VDB
980	_	_	\|a UNRESTRICTED
980	_	_	\|a I:(DE-H253)Z_VER-20210408
980	1	_	\|a FullTexts

Library	Collection	CLSMajor	CLSMinor	Language	Author

Marc 21

guest :: login PUBDB
		Search		Submit		Personalize Your alerts Your baskets Your searches		Help