منابع مشابه
The LkH α 101 Cluster Sean
In the infrared, the heavily reddened LkHα 101 is one of the brightest young stars in the sky. Situated just north of the Taurus-Auriga complex in the L1482 dark cloud, it appears to be an early B-type star that has been serendipitously exposed during a rarely observed stage of early evolution, revealing a remarkable spectrum and a directly-imaged circumstellar disk. While detailed studies of t...
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Critical to survival is the geriatric concept, allostasis, defined as the ability to achieve stability through change. It is appropriate that allostasis is an introduction to this commentary, which may partially apply to the medical and pharmacy profession as currently constituted.
متن کاملIs LkH 264 like a young , extremely active Sun ?
We combine calibrated IUE data archive and new low resolution optical data for the T Tauri star LkH 264 covering the region from 1200 to 7000 A. The UV continuum is well tted by the combination of a black body at 4300 K plus hydrogenic free-free and free-bound emission from a dense plasma at 3.5 10 4 K plus the emission by a second black body. This last component is at T 8700 K and covers about...
متن کامل/ 01 02 24 0 v 1 1 4 Fe b 20 01 A dusty torus around the luminous young star LkH α 101
A star forms when a cloud of dust and gas collapses. It is generally believed that this collapse first produces a flattened rotating disk[1, 2], through which matter is fed onto the embryonic star at the center of the disk. When the temperature and density at the center of the star pass a critical threshold, thermonuclear fusion begins. The remaining disk, which can still contain up to ∼0.3 tim...
متن کاملSubmillimetre emission from η Carinae
We present critical, long-wavelength observations of η Carinae in the submillimetre using SCUBA on the JCMT at 850 and 450 μm to confirm the presence of a large mass of warm dust around the central star. We fit a two-component blackbody to the IR-submm spectral energy distribution (SED) and estimate between 0.3− 0.7 M⊙ of dust exists in the nebula depending on the dust absorption properties and...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1973
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/161.1.1p