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Article: De-excitation C and O lines and the 511 keV annihilation line from Sgr A*
Title | De-excitation C and O lines and the 511 keV annihilation line from Sgr A* |
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Authors | |
Keywords | 511 keV line Black hole De-excitation lines Secondary positrons |
Issue Date | 2008 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/newastrev |
Citation | New Astronomy Reviews, 2008, v. 52 n. 7-10, p. 460-462 How to Cite? |
Abstract | We present a model of the observed annihilation emission from the Galactic center. From our estimations it follows that this region should emit also a flux of de-excitation C and O lines at the level ≤10-5 ph cm-2 s-1. From restrictions based on the observed >100 MeV gamma-ray flux from the Galactic center, ∼2 × 10-5 ph cm-2 s-1, we predict that the calculated gamma-ray line flux below 8 MeV is about 2.5 × 10- 5 ph cm- 2 s- 1. A specific line is the one at 1.809 MeV from radioactivity of 26Al. The predicted quasi-stationary flux of the 26Al 1.809 MeV line from the 1 ° × 1 ° central region is ≤ 10- 6 ph cm- 2 s- 1. © 2008 Elsevier B.V. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/80661 |
ISSN | 2023 Impact Factor: 11.7 2023 SCImago Journal Rankings: 2.950 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Dogiel, VA | en_HK |
dc.contributor.author | Cheng, KS | en_HK |
dc.contributor.author | Chernyshov, DO | en_HK |
dc.contributor.author | Tatischeff, V | en_HK |
dc.contributor.author | Ko, CM | en_HK |
dc.contributor.author | Ip, WH | en_HK |
dc.date.accessioned | 2010-09-06T08:08:54Z | - |
dc.date.available | 2010-09-06T08:08:54Z | - |
dc.date.issued | 2008 | en_HK |
dc.identifier.citation | New Astronomy Reviews, 2008, v. 52 n. 7-10, p. 460-462 | en_HK |
dc.identifier.issn | 1387-6473 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/80661 | - |
dc.description.abstract | We present a model of the observed annihilation emission from the Galactic center. From our estimations it follows that this region should emit also a flux of de-excitation C and O lines at the level ≤10-5 ph cm-2 s-1. From restrictions based on the observed >100 MeV gamma-ray flux from the Galactic center, ∼2 × 10-5 ph cm-2 s-1, we predict that the calculated gamma-ray line flux below 8 MeV is about 2.5 × 10- 5 ph cm- 2 s- 1. A specific line is the one at 1.809 MeV from radioactivity of 26Al. The predicted quasi-stationary flux of the 26Al 1.809 MeV line from the 1 ° × 1 ° central region is ≤ 10- 6 ph cm- 2 s- 1. © 2008 Elsevier B.V. All rights reserved. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/newastrev | en_HK |
dc.relation.ispartof | New Astronomy Reviews | en_HK |
dc.rights | New Astronomy Reviews. Copyright © Elsevier BV. | en_HK |
dc.subject | 511 keV line | en_HK |
dc.subject | Black hole | en_HK |
dc.subject | De-excitation lines | en_HK |
dc.subject | Secondary positrons | en_HK |
dc.title | De-excitation C and O lines and the 511 keV annihilation line from Sgr A* | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1387-6473&volume=52&spage=460&epage=462&date=2008&atitle=De-excitation+C+and+O+lines+and+the+511+keV+annihilation+line+from+Sgr+A* | en_HK |
dc.identifier.email | Cheng, KS: hrspksc@hkucc.hku.hk | en_HK |
dc.identifier.authority | Cheng, KS=rp00675 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.newar.2008.06.025 | en_HK |
dc.identifier.scopus | eid_2-s2.0-51849130958 | en_HK |
dc.identifier.hkuros | 152363 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-51849130958&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 52 | en_HK |
dc.identifier.issue | 7-10 | en_HK |
dc.identifier.spage | 460 | en_HK |
dc.identifier.epage | 462 | en_HK |
dc.identifier.isi | WOS:000260738300026 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Dogiel, VA=6603566238 | en_HK |
dc.identifier.scopusauthorid | Cheng, KS=9745798500 | en_HK |
dc.identifier.scopusauthorid | Chernyshov, DO=14059433800 | en_HK |
dc.identifier.scopusauthorid | Tatischeff, V=8654848800 | en_HK |
dc.identifier.scopusauthorid | Ko, CM=7202596730 | en_HK |
dc.identifier.scopusauthorid | Ip, WH=7102820054 | en_HK |
dc.identifier.citeulike | 5320419 | - |
dc.identifier.issnl | 1387-6473 | - |