A study of M31, M87, NGC 253, and M82 in high-energy gamma rays

P. Sreekumar; D. L. Bertsch; B. L. Dingus; J. A. Esposito; C. E. Fichtel; R. C. Hartman; S. D. Hunter; G. Kanbach; D. A. Kniffen; Y. C. Lin; J. R. Mattox; H. A. Mayer-Hasselwander; P. F. Michelson; C. Von Montigny; P. L. Nolan; E. J. Schneid; D. J. Thompson

doi:10.1086/174044

A study of M31, M87, NGC 253, and M82 in high-energy gamma rays

P. Sreekumar^*, D. L. Bertsch, B. L. Dingus, J. A. Esposito, C. E. Fichtel, R. C. Hartman, S. D. Hunter, G. Kanbach, D. A. Kniffen, Y. C. Lin, J. R. Mattox, H. A. Mayer-Hasselwander, P. F. Michelson, C. Von Montigny, P. L. Nolan, E. J. Schneid, D. J. Thompson

^*Corresponding author for this work

Manipal Centre for Natural Sciences, Manipal

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

The data from the Energetic Gamma Ray Experiment Telescope (EGRET) all-sky survey are examined for emission from the nearby galaxies M31, M87, NGC 253, and M82 in the high-energy (E > 30 MeV) gamma-ray range. No significant emission is observed from any of these galaxies. The derived upper limits for all four galaxies are consistent with that expected from cosmic-ray interactions. For M87, the combination of the high-energy gamma-ray and radio data point to a lower limit of 7 μG for the magnetic field in the disk and 4 μG for the magnetic field in the halo, consistent with equipartition arguments. A study of NGC 253 and M82 show that EGRET observations do not sufficiently constrain the mean cosmic-ray energy density to provide more details on the cosmic-ray distribution in starburst galaxies.

Original language	English
Pages (from-to)	105-108
Number of pages	4
Journal	Astrophysical Journal
Volume	426
Issue number	1
DOIs	https://doi.org/10.1086/174044
Publication status	Published - 01-05-1994

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1086/174044

Cite this

Sreekumar, P., Bertsch, D. L., Dingus, B. L., Esposito, J. A., Fichtel, C. E., Hartman, R. C., Hunter, S. D., Kanbach, G., Kniffen, D. A., Lin, Y. C., Mattox, J. R., Mayer-Hasselwander, H. A., Michelson, P. F., Von Montigny, C., Nolan, P. L., Schneid, E. J., & Thompson, D. J. (1994). A study of M31, M87, NGC 253, and M82 in high-energy gamma rays. Astrophysical Journal, 426(1), 105-108. https://doi.org/10.1086/174044

@article{c655d9232fdb43148d47af75393b0130,

title = "A study of M31, M87, NGC 253, and M82 in high-energy gamma rays",

abstract = "The data from the Energetic Gamma Ray Experiment Telescope (EGRET) all-sky survey are examined for emission from the nearby galaxies M31, M87, NGC 253, and M82 in the high-energy (E > 30 MeV) gamma-ray range. No significant emission is observed from any of these galaxies. The derived upper limits for all four galaxies are consistent with that expected from cosmic-ray interactions. For M87, the combination of the high-energy gamma-ray and radio data point to a lower limit of 7 μG for the magnetic field in the disk and 4 μG for the magnetic field in the halo, consistent with equipartition arguments. A study of NGC 253 and M82 show that EGRET observations do not sufficiently constrain the mean cosmic-ray energy density to provide more details on the cosmic-ray distribution in starburst galaxies.",

author = "P. Sreekumar and Bertsch, \{D. L.\} and Dingus, \{B. L.\} and Esposito, \{J. A.\} and Fichtel, \{C. E.\} and Hartman, \{R. C.\} and Hunter, \{S. D.\} and G. Kanbach and Kniffen, \{D. A.\} and Lin, \{Y. C.\} and Mattox, \{J. R.\} and Mayer-Hasselwander, \{H. A.\} and Michelson, \{P. F.\} and \{Von Montigny\}, C. and Nolan, \{P. L.\} and Schneid, \{E. J.\} and Thompson, \{D. J.\}",

year = "1994",

month = may,

day = "1",

doi = "10.1086/174044",

language = "English",

volume = "426",

pages = "105--108",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Sreekumar, P, Bertsch, DL, Dingus, BL, Esposito, JA, Fichtel, CE, Hartman, RC, Hunter, SD, Kanbach, G, Kniffen, DA, Lin, YC, Mattox, JR, Mayer-Hasselwander, HA, Michelson, PF, Von Montigny, C, Nolan, PL, Schneid, EJ & Thompson, DJ 1994, 'A study of M31, M87, NGC 253, and M82 in high-energy gamma rays', Astrophysical Journal, vol. 426, no. 1, pp. 105-108. https://doi.org/10.1086/174044

TY - JOUR

T1 - A study of M31, M87, NGC 253, and M82 in high-energy gamma rays

AU - Sreekumar, P.

AU - Bertsch, D. L.

AU - Dingus, B. L.

AU - Esposito, J. A.

AU - Fichtel, C. E.

AU - Hartman, R. C.

AU - Hunter, S. D.

AU - Kanbach, G.

AU - Kniffen, D. A.

AU - Lin, Y. C.

AU - Mattox, J. R.

AU - Mayer-Hasselwander, H. A.

AU - Michelson, P. F.

AU - Von Montigny, C.

AU - Nolan, P. L.

AU - Schneid, E. J.

AU - Thompson, D. J.

PY - 1994/5/1

Y1 - 1994/5/1

N2 - The data from the Energetic Gamma Ray Experiment Telescope (EGRET) all-sky survey are examined for emission from the nearby galaxies M31, M87, NGC 253, and M82 in the high-energy (E > 30 MeV) gamma-ray range. No significant emission is observed from any of these galaxies. The derived upper limits for all four galaxies are consistent with that expected from cosmic-ray interactions. For M87, the combination of the high-energy gamma-ray and radio data point to a lower limit of 7 μG for the magnetic field in the disk and 4 μG for the magnetic field in the halo, consistent with equipartition arguments. A study of NGC 253 and M82 show that EGRET observations do not sufficiently constrain the mean cosmic-ray energy density to provide more details on the cosmic-ray distribution in starburst galaxies.

AB - The data from the Energetic Gamma Ray Experiment Telescope (EGRET) all-sky survey are examined for emission from the nearby galaxies M31, M87, NGC 253, and M82 in the high-energy (E > 30 MeV) gamma-ray range. No significant emission is observed from any of these galaxies. The derived upper limits for all four galaxies are consistent with that expected from cosmic-ray interactions. For M87, the combination of the high-energy gamma-ray and radio data point to a lower limit of 7 μG for the magnetic field in the disk and 4 μG for the magnetic field in the halo, consistent with equipartition arguments. A study of NGC 253 and M82 show that EGRET observations do not sufficiently constrain the mean cosmic-ray energy density to provide more details on the cosmic-ray distribution in starburst galaxies.

UR - https://www.scopus.com/pages/publications/12044254398

UR - https://www.scopus.com/inward/citedby.url?scp=12044254398&partnerID=8YFLogxK

U2 - 10.1086/174044

DO - 10.1086/174044

M3 - Article

AN - SCOPUS:12044254398

SN - 0004-637X

VL - 426

SP - 105

EP - 108

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

A study of M31, M87, NGC 253, and M82 in high-energy gamma rays

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this