X-ray detections of two young bona-fide brown dwarfs
نویسندگان
چکیده
منابع مشابه
Search for X-ray emission from bona-fide and candidate brown dwarfs
Following the recent classification of the Xray detected object V410 x-ray 3 with a young brown dwarf candidate (Briceño et al. 1998) and the identification of an X-ray source in Chamaeleon as young bonafide brown dwarf (Neuhäuser & Comerón 1998), we investigate all ROSAT All-Sky Survey and archived ROSAT PSPC and HRI pointed observations with bona-fide or candidate brown dwarfs in the field of...
متن کاملX-ray Detection from Bona-fide and Candidate Brown Dwarfs in the ρ Ophiuchi Cloud with Chandra
We present results of an X-ray search from bona-fide and candidate brown dwarfs in the ρ Ophiuchi cloud cores with the Chandra X-ray Observatory. The selected areas are two fields near the cloud center and are observed with the ACIS-I array of a 17 × 17 size and a ∼100 ks exposure. Among 18 bona-fide and candidate brown dwarfs listed by the infrared spectroscopy, we find X-ray emission from 7 s...
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We present the results of a nonadiabatic, linear stability analysis of models of very low-mass stars (VLMSs) and brown dwarfs (BDs) during the deuterium burning phase in the center. We find unstable fundamental modes with periods varying between ∼5 hr for a 0.1 M⊙ star and ∼1 hr for a 0.02 M⊙ BD. The growth time of the instability decreases with decreasing mass and remains well below the deuter...
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Aims. We report the X-ray properties of young (∼3 Myr) bona fide brown dwarfs of the Taurus Molecular Cloud (TMC). Methods. The XMM-Newton Extended Survey of the TMC (XEST) is a large program designed to systematically investigate the X-ray properties of young stellar/substellar objects in the TMC. In particular, the area surveyed by 15 XMM-Newton pointings (of which three are archival observat...
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We report on two recent XMM-Newton observations of Brown Dwarfs in the Pleiades cluster and in the field aiming to constrain the age dependence of X-ray emission from substellar objects.
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2004
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20040016