Chemical Abundances in the Secondary Star of the Black Hole Binary V4641 Sagittarii (SAX J1819.3−2525)
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چکیده
منابع مشابه
Chemical Abundances in the Secondary Star of the Black Hole Binary V 4641
Kozo Sadakane, Akira Arai, Wako Aoki, Nobuo Arimoto, Masahide Takada-Hidai, Takashi Ohnishi, Akito Tajitsu, Timothy C. Beers, Nobuyuki Iwamoto, Nozomu Tominaga, Hideyuki Umeda, Keiichi Maeda, and Ken’ichi Nomoto Astronomical Institute, Osaka Kyoiku University, Asahigaoka, Kashiwara, Osaka 582-8582 National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 Liberal Arts Education Cen...
متن کاملChemical Abundances of the Secondary Star in the Black Hole X-ray Binary XTE J1118+480
Following the recent abundance measurements of Mg, Al, Ca, Fe, and Ni in the black hole X-ray binary XTE J1118+480 using medium-resolution Keck II/ESI spectra of the secondary star (González Hernández et al. 2006), we perform a detailed abundance analysis including the abundances of Si and Ti. These element abundances, higher than solar, indicate that the black hole in this system formed in a s...
متن کاملChemical Abundances in the Secondary Star of the Black Hole Binary
Kozo Sadakane, Akira Arai, Wako Aoki, Nobuo Arimoto, Masahide Takada-Hidai, Takashi Ohnishi, Akito Tajitsu, Timothy C. Beers, Nobuyuki Iwamoto, Nozomu Tominaga, Hideyuki Umeda, Keiichi Maeda, and Ken’ichi Nomoto Astronomical Institute, Osaka Kyoiku University, Asahigaoka, Kashiwara, Osaka 582-8582 National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 Liberal Arts Education Cen...
متن کاملA Black Hole in the Superluminal Source Sax J1819.3-2525 (v4641 Sgr)1
Spectroscopic observations of the fast X-ray transient and superluminal jet source SAX J1819.3-2525 (V4641 Sgr) reveal a best fitting period of Pspect = 2:81678 0:00056 days and a semiamplitude of K2 = 211:0 3:1 km s−1. The optical mass function is f (M) = 2:74 0:12 M . We find a photometric period of Pphoto = 2:81730 0:00001 days using a light curve measured from photographic plates. The folde...
متن کاملThe Rapid X-Ray Variability of V4641 Sagittarii (SAX J1819.3-2525 = XTE J1819-254).
We report on the rapid X-ray variability of the variable star and X-ray transient V4641 Sagittarii (SAX J1819.3-2525 = XTE J1819-254) as observed on 1999 September 15 by the proportional counter array (PCA) on board the Rossi X-Ray Timing Explorer. During the first approximately 900 s of the first PCA observation, V4641 Sgr showed very strong X-ray fluctuations by a factor of 4 on timescales of...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Japan
سال: 2006
ISSN: 0004-6264,2053-051X
DOI: 10.1093/pasj/58.3.595