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Article: De-excitation C and O lines and the 511 keV annihilation line from Sgr A*

TitleDe-excitation C and O lines and the 511 keV annihilation line from Sgr A*
Authors
Keywords511 keV line
Black hole
De-excitation lines
Secondary positrons
Issue Date2008
PublisherElsevier 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?
AbstractWe 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 Identifierhttp://hdl.handle.net/10722/80661
ISSN
2015 Impact Factor: 6.154
2015 SCImago Journal Rankings: 3.956
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDogiel, VAen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorChernyshov, DOen_HK
dc.contributor.authorTatischeff, Ven_HK
dc.contributor.authorKo, CMen_HK
dc.contributor.authorIp, WHen_HK
dc.date.accessioned2010-09-06T08:08:54Z-
dc.date.available2010-09-06T08:08:54Z-
dc.date.issued2008en_HK
dc.identifier.citationNew Astronomy Reviews, 2008, v. 52 n. 7-10, p. 460-462en_HK
dc.identifier.issn1387-6473en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80661-
dc.description.abstractWe 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.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/newastreven_HK
dc.relation.ispartofNew Astronomy Reviewsen_HK
dc.rightsNew Astronomy Reviews. Copyright © Elsevier BV.en_HK
dc.subject511 keV lineen_HK
dc.subjectBlack holeen_HK
dc.subjectDe-excitation linesen_HK
dc.subjectSecondary positronsen_HK
dc.titleDe-excitation C and O lines and the 511 keV annihilation line from Sgr A*en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://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.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.newar.2008.06.025en_HK
dc.identifier.scopuseid_2-s2.0-51849130958en_HK
dc.identifier.hkuros152363en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-51849130958&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume52en_HK
dc.identifier.issue7-10en_HK
dc.identifier.spage460en_HK
dc.identifier.epage462en_HK
dc.identifier.isiWOS:000260738300026-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridDogiel, VA=6603566238en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridChernyshov, DO=14059433800en_HK
dc.identifier.scopusauthoridTatischeff, V=8654848800en_HK
dc.identifier.scopusauthoridKo, CM=7202596730en_HK
dc.identifier.scopusauthoridIp, WH=7102820054en_HK
dc.identifier.citeulike5320419-

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