کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10704627 1022013 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An additional Hα emission component in LS I +61°303: Further evidence for the Hα emission related to the neutron star
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
An additional Hα emission component in LS I +61°303: Further evidence for the Hα emission related to the neutron star
چکیده انگلیسی
A long-term program has been established since 1992 to monitor more than a dozen of observable X-ray binaries. We present the long-term spectroscopic results of the Be/X-ray binary, LS I +61°303. The Hα emission line, usually observed as a double-peaked profile with a dominant red peak, varies noticeably during our program. While the blue peak of the Hα emission line decreases gradually, the red peak increases considerably in 2002 October observational run and remains relatively unchanged in 2004 September run. We attribute these variations to the asymmetric perturbation in the Be envelope. Finally, we report on the discovery of a two-component structure in the Hα emission line when close to the apastron. In addition to the original double-peaked Hα emission component, an additional emission component emerges at the center part of the emission line, which could originate in the accretion disc around the neutron star.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 11, Issue 2, November 2005, Pages 130-137
نویسندگان
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