منابع مشابه
Kh 15d: a Spectroscopic Binary
We present the results of a high-resolution spectroscopic monitoring program of the eclipsing pre–main-sequence star KH 15D that reveal it to be a single-line spectroscopic binary. We find that the best-fit Keplerian model has a period P = 48.38 days, which is nearly identical to the photometric period. Thus, we find the best explanation for the periodic dimming of KH 15D is that the binary mot...
متن کاملKH 15D: Gradual Occultation of a Pre–Main-Sequence Binary
We propose that the extraordinary “winking star” KH 15D is an eccentric pre–mainsequence binary that is gradually being occulted by an opaque screen. This model accounts for the periodicity, depth, duration, and rate of growth of the modern eclipses; the historical light curve from photographic plates; and the existing radial velocity measurements. It also explains the re-brightening events tha...
متن کاملThe Orbit and Occultations of Kh 15d
The unusual flux variations of the pre–main-sequence binary star KH 15D have been attributed to occultations by a circumbinary disk. We test whether or not this theory is compatible with newly available data, including recent radial velocity measurements, CCD photometry over the past decade, and photographic photometry over the past 50 years. We find the model to be successful, after two refine...
متن کاملThe Circumbinary Ring of Kh 15d
The light curves of the pre-main-sequence star KH 15D from the years 1913– 2003 can be understood if the star is a member of an eccentric binary that is encircled by a vertically thin, inclined ring of dusty gas. Eclipses occur whenever the reflex motion of a star carries it behind the circumbinary ring; the eclipses occur with period equal to the binary orbital period of 48.4 days. Features of...
متن کاملSpectroscopy of Molecular Hydrogen Emission from Kh 15d
We report infrared spectroscopy of the unusual eclipsing pre–main-sequence object KH 15D, obtained using NIRSPEC on Keck II. During eclipse, observations using low spectral resolution ( ) reveal the presence l/dl ∼ 1000 of prominent molecular hydrogen emission in five lines near 2 mm. The relative line strengths are consistent with thermal excitation at K. Observations out of eclipse, at both l...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2004
ISSN: 0004-6256,1538-3881
DOI: 10.1086/422735