ASCAObservations of the Sagittarius B2 Cloud: An X‐Ray Reflection Nebula | Zendy

Hiroshi Murakami | Zendy; Katsuji Koyama | Zendy; Masaaki Sakano | Zendy; Masahiro Tsujimoto | Zendy; Yoshitomo Maeda | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

ASCAObservations of the Sagittarius B2 Cloud: An X‐Ray Reflection Nebula

Author(s) -

Hiroshi Murakami,

Katsuji Koyama,

Masaaki Sakano,

Masahiro Tsujimoto,

Yoshitomo Maeda

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/308717

Subject(s) - physics , astrophysics , galactic center , molecular cloud , reflection nebula , astronomy , nebula , line (geometry) , x ray , reflection (computer programming) , emission spectrum , line of sight , galactic plane , spectral line , stars , optics , geometry , mathematics , computer science , programming language

We present the ASCA results of imaging spectroscopy of the giant molecularcloud Sgr B2. The X-ray spectrum is found to be very peculiar; it exhibits astrong emission line at 6.4 keV, a low energy cutoff below about 4 keV and apronounced edge-structure at 7.1 keV. The X-ray image is extended and its peakposition is shifted from the core of the molecular cloud toward the Galacticcenter by about 1--2 arcminute. The X-ray spectrum and the morphology are wellreproduced by a scenario that X-rays from an external source located in theGalactic center direction are scattered by the molecular cloud Sgr B2, and comeinto our line of sight. Thus Sgr B2 may be called an X-ray reflection nebula.Possible implications of the Galactic center activity related to this uniquesource are presented.Comment: 15 pages, 8 figures, AAS LaTeX, To be published in The Astrophysical Journa

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research