SIMP J2154–1055: A NEW LOW-GRAVITY L4β BROWN DWARF CANDIDATE MEMBER OF THE ARGUS ASSOCIATION
نویسندگان
چکیده
منابع مشابه
Optical spectroscopy of a brown dwarf candidate ⋆
We have used the Low-Resolution Imaging Spectrograph on the Keck II telescope to observe the brown dwarf candidate D04 (Hawkins et al, 1998). The spectrum matches that of a spectral-type M7 dwarf, implying a photospheric temperature of ≈ 2600K. This is consistent with the available (R-I)C and (I-K) colours. If the parallax measured by Hawkins et al is correct, then the implication is that D04 h...
متن کاملA proto brown dwarf candidate in Taurus
Aims. We search for brown dwarfs at the Class 0/I evolutionary stage, or proto brown dwarfs. Methods. We present a multi wavelength study, ranging from optical at 0.8 μm to radio wavelengths at 6 cm, of a cool, very faint, and red multiple object, SSTB213 J041757, detected by Spitzer toward the Barnard 213 dark cloud, in Taurus. Results. The SED of SSTB213 J041757 displays a clear excess at lon...
متن کاملA Brown Dwarf Microlens Candidate in the OGLE-II Database
We describe a unique mass determination for a microlensing event from the second phase of the Optical Gravitational Microlensing Experiment (OGLE-II). The event, sc26 2218, which is very bright (baseline magnitude I = 15.10), appears to exhibit both parallax and finite source effects. The parallax effect allows us to determine the projected Einstein radius on the observer plane (r̃E ≈ 3.8AU), wh...
متن کاملLow-mass spectroscopic binaries in the Hyades: a candidate brown dwarf companion
We have used the HIRES echelle spectrograph in the Keck I telescope to obtain high-resolution spectroscopy of 51 late-type M dwarfs in the Hyades cluster. Cross-correlating the calibrated data against spectra of white dwarfs allows us to determine heliocentric velocities with an accuracy of ±0.3 kms. Twenty seven stars were observed at two epochs in 1997; two stars, RHy 42 and RHy 403, are conf...
متن کاملPhotometric Variability of the T2.5 Brown Dwarf Simp J013656.5+093347; Evidence for Evolving Weather Patterns
We report the discovery of a photometric variability in the bright T2.5 brown dwarf SIMP J013656.57+093347.3. Continuous J-band photometry has been obtained for several hours on four different nights. The light curves show a periodic modulation with a period of ∼2.4 hours, a peak-to-peak amplitude of ∼ 50 mmag and significant night-to-night evolution. We suggest that the light curve modulation ...
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 Astrophysical Journal
سال: 2014
ISSN: 2041-8213
DOI: 10.1088/2041-8205/792/1/l17