Orbital motion of the young brown dwarf companion TWA 5 B
نویسندگان
چکیده
منابع مشابه
A Possible Brown Dwarf Companion to the White Dwarf Gd1400
An unresolved, likely L dwarf companion to the DA white dwarf GD1400 is reported. This would be only the second such system known, discovered 17 years after the prototype L dwarf, GD165B, was determined to be a companion to a white dwarf. Photometric observations and model predicted stellar parameters of the well studied white dwarf primary indicate that GD1400B has J−K & 2.0 and MK = 12.13 mag...
متن کاملHst Nicmos Imaging of the Planetary-mass Companion to the Young Brown Dwarf 2massw J1207334 393254
Multiband (0.9Y1.6 m) images of the TW Hydrae association (TWA) brown dwarf 2MASSW J1207334 393254 (also known as 2M 1207) and its candidate planetary-mass companion (2M 1207b) were obtained on 2004 August 28 and 2005 April 26 withHSTNICMOS. The images from these two epochs unequivocally confirm the two objects as a common proper motion pair (16.0 confidence). A new measurement of the proper mo...
متن کاملObserving the planet formation time - scale by ground - based direct imaging of planetary companions to young nearby stars : Gemini / Hōkūpa ′ a image of TWA - 5
Many extra-solar planets and a few planetary systems have been found indirectly by small periodic radial velocity variations around old nearby stars. The orbital characteristics of most of them are different from the planets in our solar system. Hence, planet formation theories have to be revised. Therefore, observational constraints regarding young planets would be very valuable. We have start...
متن کاملThe brown dwarf desert as a consequence of orbital migration
We show that the dearth of brown dwarfs in short-period orbits around Solar-mass stars – the brown dwarf desert – can be understood as a consequence of inward migration within an evolving protoplanetary disc. Brown dwarf secondaries forming at the same time as the primary star have masses which are comparable to the initial mass of the protoplanetary disc. Subsequent disc evolution leads to inw...
متن کاملKeck Speckle Imaging of the White Dwarf G29-38: No Brown Dwarf Companion Detected
The white dwarf Giclas 29-38 has attracted much attention due to its large infrared excess and the suggestion that excess might be due to a companion brown dwarf. We observed this object using speckle interferometry at the Keck telescope, obtaining diffraction-limited resolution (55 milliarcseconds) at K band, and found it unresolved. Assuming the entire K band excess is due to a single point-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: Astronomy and Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200913917