De-excitation gamma-ray line emission from the galactic center

D. O. Chernyshov; V. A. Dogiel; V. Tatischeff; K. S. Cheng; C. M. Ko; W. H. Ip

De-excitation gamma-ray line emission from the galactic center

D. O. Chernyshov, V. A. Dogiel, V. Tatischeff, K. S. Cheng, C. M. Ko, W. H. Ip

Graduate Institute of Astronomy

Research output: Contribution to journal › Conference article › peer-review

Abstract

A future detection of de-excitation gamma-ray lines from the Galactic center region would provide unique information on the high-energy processes induced by the the central black hole and the physical conditions of the emitting region. We analyse the intensity of nuclear de-excitation lines in the direction of the Galactic center produced by subrelativistic protons, which are generated by star capture by the central black hole. With the metallicity two times higher than the solar one the total flux in gamma-ray lines of energies below 8 MeV is about 10^-4cm^-2s^-1. The most promising lines for detection are those at 4.44 and ∼ 6.2 MeV, with a predicted flux in each line of ≈ 10^-5photons cm^-2s ^-1. We also analyze the possibility of detection of these lines by INTEGRAL and future missions.

Original language	English
Journal	Proceedings of Science
State	Published - 2009
Event	Science Workshop to Celebrate 7 Years of Integral - The Extreme Sky: Sampling the Universe above 10 keV, Extremesky 2009 - Otranto, Lecce, Italy Duration: 13 Oct 2009 → 17 Oct 2009

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title = "De-excitation gamma-ray line emission from the galactic center",

abstract = "A future detection of de-excitation gamma-ray lines from the Galactic center region would provide unique information on the high-energy processes induced by the the central black hole and the physical conditions of the emitting region. We analyse the intensity of nuclear de-excitation lines in the direction of the Galactic center produced by subrelativistic protons, which are generated by star capture by the central black hole. With the metallicity two times higher than the solar one the total flux in gamma-ray lines of energies below 8 MeV is about 10-4cm-2s-1. The most promising lines for detection are those at 4.44 and ∼ 6.2 MeV, with a predicted flux in each line of ≈ 10-5photons cm-2s -1. We also analyze the possibility of detection of these lines by INTEGRAL and future missions.",

author = "Chernyshov, {D. O.} and Dogiel, {V. A.} and V. Tatischeff and Cheng, {K. S.} and Ko, {C. M.} and Ip, {W. H.}",

year = "2009",

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journal = "Proceedings of Science",

issn = "1824-8039",

note = "Science Workshop to Celebrate 7 Years of Integral - The Extreme Sky: Sampling the Universe above 10 keV, Extremesky 2009 ; Conference date: 13-10-2009 Through 17-10-2009",

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TY - JOUR

T1 - De-excitation gamma-ray line emission from the galactic center

AU - Chernyshov, D. O.

AU - Dogiel, V. A.

AU - Tatischeff, V.

AU - Cheng, K. S.

AU - Ko, C. M.

AU - Ip, W. H.

PY - 2009

Y1 - 2009

N2 - A future detection of de-excitation gamma-ray lines from the Galactic center region would provide unique information on the high-energy processes induced by the the central black hole and the physical conditions of the emitting region. We analyse the intensity of nuclear de-excitation lines in the direction of the Galactic center produced by subrelativistic protons, which are generated by star capture by the central black hole. With the metallicity two times higher than the solar one the total flux in gamma-ray lines of energies below 8 MeV is about 10-4cm-2s-1. The most promising lines for detection are those at 4.44 and ∼ 6.2 MeV, with a predicted flux in each line of ≈ 10-5photons cm-2s -1. We also analyze the possibility of detection of these lines by INTEGRAL and future missions.

AB - A future detection of de-excitation gamma-ray lines from the Galactic center region would provide unique information on the high-energy processes induced by the the central black hole and the physical conditions of the emitting region. We analyse the intensity of nuclear de-excitation lines in the direction of the Galactic center produced by subrelativistic protons, which are generated by star capture by the central black hole. With the metallicity two times higher than the solar one the total flux in gamma-ray lines of energies below 8 MeV is about 10-4cm-2s-1. The most promising lines for detection are those at 4.44 and ∼ 6.2 MeV, with a predicted flux in each line of ≈ 10-5photons cm-2s -1. We also analyze the possibility of detection of these lines by INTEGRAL and future missions.

UR - http://www.scopus.com/inward/record.url?scp=84890626235&partnerID=8YFLogxK

M3 - 會議論文

AN - SCOPUS:84890626235

SN - 1824-8039

JO - Proceedings of Science

JF - Proceedings of Science

T2 - Science Workshop to Celebrate 7 Years of Integral - The Extreme Sky: Sampling the Universe above 10 keV, Extremesky 2009

Y2 - 13 October 2009 through 17 October 2009

ER -

De-excitation gamma-ray line emission from the galactic center

Abstract

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