stars: brown dwarfs
1-10 Myr-old Low Mass Stars and Brown Dwarfs in Nearby Star Forming Regions
... of brown dwarfs compared to solar-type pre-main sequence stars may cause differences in the evolution of accretion, disk composition and grain ...of brown dwarfs and low mass ...
222
Very low mass stars and brown dwarfs in Upper Scorpius using Gaia DR1 : mass function, disks, and kinematics
... the brown dwarf population in star forming regions is dependent on knowing distances and proper motions, and therefore will be improved through the Gaia space ...type stars in the same region, we determine ...
27
Radial and rotational velocities of young brown dwarfs and very low-mass stars in the Upper Scorpius OB association and the ρ Ophiuchi cloud core
... Recent high-resolution imaging studies of brown dwarfs (BDs) and very low-mass (VLM) stars have placed strong constraints on binaries with separations of∼1–100 au. For example, Hubble Space Telescope ...
10
A Search for Pulsation in Young Brown Dwarfs and Very Low Mass Stars
... field stars for which we serendipitously obtained photometry, it was not visible in the light curves of faint cluster members in our ...low-mass stars and brown dwarfs for this effect, but did ...
317
Emission line diagnostics for accretion and outflows in young very low mass stars and brown dwarfs
... Abstract. We discuss accretion and outflow properties of three very low-mass young stellar objects based on broad-band mid-resolution X-Shooter/VLT spectra. Our targets (FU Tau A, 2M 1207-39, and Par-Lup3-4) have ...
6
1-10 Myr-old low mass stars and brown dwarfs in nearby star forming regions
... mass stars is difficult, due to the fact that they form, evolve, and die within just a few to tens of megayears, often before their lower mass counterparts have even reached the main ...mass stars will ...
12
Ionization in atmospheres of brown dwarfs and giant gas planets
... Young brown dwarfs are considered in an environment of strong radiation field, namely in star forming regions that host high-mass O and B stars that produce a substantial fraction of high-energy ...
113
The discovery and characterization of methane bearing brown dwarfs and the definition of the T spectral class
... of brown dwarfs and passing on their excitement about this field, and I thank them for the very educational trips to UA they have ...cool dwarfs. John’s understanding of the global properties of cool ...
568
Brown dwarfs forming in discs: Where to look for them?
... Another way to reach the high densities required for the formation of BDs is in gravitationally unstable discs ([28, 34]). These discs form around newly born stars and grow quickly in mass by accreting material ...
6
The direct detection of the irradiated brown dwarf in the white dwarf - brown dwarf binary SDSS J141126.20+200911.1
... irradiated brown dwarfs can there- fore provide a useful proxy for exoplanet systems, especially to explore the effects of UV irradiation and any resultant photochem- istry, as in general hot Jupiter host ...
8
Disc frequencies for brown dwarfs in the Upper Scorpius OB association: Implications for brown dwarf formation theories
... the brown dwarf (BD) and stellar disc fractions in the Upper Scorpius (USco) OB association and compared them with several other young ...high-mass stars in USco (and the other clusters) are consistent with ...
21
Young brown dwarfs and their environments : testing star and planet formation
... AGB stars which have similar surface temperatures and colours to brown dwarfs, but much greater intrinsic ...old brown dwarf member of ...a brown dwarf member of ...the brown ...
163
SMA and CARMA observations of young brown dwarfs in ρ Ophiuchi and Taurus
... that brown dwarf formation undergoes a molecular outflow phase that is typical of young low-mass ...that brown dwarfs do form like low-mass stars, ...from brown dwarfs to ...
7
A universal spin mass relation for brown dwarfs and planets
... Taurus brown dwarfs into Figure 6, we calculate the rotational velocities they would have at the age of the solar system, after contracting to their fi nal radii, assuming angular momentum conservation (“ ...
10
Outflows and disks of brown dwarfs with SMA, CARMA and ALMA
... However, all the BDs observed so far are class II/III objects, which are in the last stages of BD formation. These objects are reaching their final masses and will end up with BD masses. Brown dwarfs at ...
7
Brown dwarfs in wide-field surveys
... The knowledge of the stellar and substellar Initial Mass Function (IMF; [44, 55, 56]) is of prime importance to understand the formation of stars and brown dwarfs. Large samples of member candidates ...
10
The formation of brown dwarfs
... low-mass stars for a wide range of initial condi- tions, and these conditions are likely to be realized in ...all brown dwarfs, and another mechanism is required to explain those seen in star ...
8
Why is "The Evolution of Stars" incorrect?
... as brown dwarfs. The International Astronomical Union defines brown dwarfs as stars massive enough to fuse deuterium at some point in their lives ( 13 Jupiter masses (MJ ), ...
6
Testing substellar models with dynamical mass measurements
... Finally, a large sample of ultracool binary orbits will provide constraints on formation models for low-mass stars and brown dwarfs as the orbital parameters of binaries (e.g., semimajor axis and ...
7
Brown dwarf formation by binary disruption
... AU) brown dwarf-brown dwarf binaries (Basri & Martín 1999; Close et ...since brown dwarfs and low-mass hydrogen-burning stars formed by ejection are al- most always ...a ...
6