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Titolo: High-resolution X-ray spectroscopy of the accretion disk corona source 4U 1822-37
Autore: Cottam, J; Sako, M; Kahn, SM; Paerels, F; Liedahl, DA;
- Indirizzi:
- Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA Columbia Univ New York NY USA 10027 Astrophys Lab, New York, NY 10027 USA Columbia Univ, Dept Phys, New York, NY 10027 USA Columbia Univ New York NY USA 10027 iv, Dept Phys, New York, NY 10027 USA Lawrence Livermore Natl Lab, Dept Phys & Adv Technol, Livermore, CA 94550 USA Lawrence Livermore Natl Lab Livermore CA USA 94550 ivermore, CA 94550 USA
- Titolo Testata:
- ASTROPHYSICAL JOURNAL
fascicolo: 2,
volume: 557,
anno: 2001,
parte:, 2
pagine: L101 - L104
- SICI:
- 0004-637X(200108)557:2<L101:HXSOTA>2.0.ZU;2-2
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- BINARIES; STREAM; X-1822-371; MODULATION;
- Keywords:
- accretion, accretion disks; binaries : eclipsing; stars : individual (4U 1822-37); X-rays : binaries;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 20
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Cottam, J Columbia Univ, Columbia Astrophys Lab, 550 W 120th St, New York,NY 10027 USA Columbia Univ 550 W 120th St New York NY USA 10027 NY 10027 USA
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- Citazione:
- J. Cottam et al., "High-resolution X-ray spectroscopy of the accretion disk corona source 4U 1822-37", ASTROPHYS J, 557(2), 2001, pp. L101-L104
Abstract
We present a preliminary analysis of the X-ray spectrum of the accretion disk corona source 4U 1822-37 obtained with the High-Energy Transmission Grating Spectrometer on board the Chandra X-Ray Observatory. We detect discrete emission lines from photoionized iron, silicon, magnesium, neon, and oxygen as well as a bright iron fluorescent line. Phase-resolved spectroscopy suggests that the recombination emission comes from an X-ray-illuminated bulge located at the predicted point of impact between the disk and the accretion stream. The fluorescent emission originates in an extended region on the disk that is illuminated by light scattered from the corona.
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Documento generato il 25/05/13 alle ore 04:37:54