Testing substellar models with dynamical mass measurements
نویسندگان
چکیده
منابع مشابه
Dynamical Mass of the Substellar Benchmark Binary HD 130948 BC
We present Keck adaptive optics imaging of the L4+L4 binary HD 130948BC along with archival HST and Gemini-North observations, which together span ≈70% of the binary’s orbital period. From the relative orbit, we determine a total dynamical mass of 0.109±0.002 M⊙ (114±2 MJup). The flux ratio of HD 130948BC is near unity, so both components are unambiguously substellar for any plausible mass rati...
متن کاملConfronting Substellar Theoretical Models with Stellar Ages
By definition, brown dwarfs never reach the main-sequence, cooling and dimming over their entire lifetime, thus making substellar models challenging to test because of the strong dependence on age. Currently, most brown dwarfs with independently determined ages are companions to nearby stars, so stellar ages are at the heart of the effort to test substellar models. However, these models are onl...
متن کاملTesting dynamical models of vision
Most models of vision focus either on the spatial or temporal aspects of visual processing and neglect the other component. A variety of studies have shown, however, that spatial and temporal processing cannot easily be separated. The shine-through effect has proven to be a sensitive tool to study spatio-temporal processing. Two very different dynamical models, the 3D-LAMINART and the WCTM mode...
متن کاملThe Substellar Mass Function: A Bayesian Approach
We report our efforts to constrain the form of the low-mass star and brown dwarf mass function via Bayesian inference. Recent surveys of M, L, and T dwarfs in the local solar neighborhood are an essential component of our study. Uncertainties in the age distribution of local field stars make reliable inference complicated. We adopt a wide range of plausible assumptions about the rate of galacti...
متن کاملThe Substellar Mass Function in σ Orionis
We combine results from imaging searches for substellar objects in the σ Orionis cluster and follow-up photometric and spectroscopic observations to derive a census of the brown dwarf population in a region of 847 arcmin 2. We identify 64 very low-mass cluster member candidates in this region. We – 2 – have available three color (IZ and J) photometry for all of them, spectra for 9 objects, and ...
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: EPJ Web of Conferences
سال: 2011
ISSN: 2100-014X
DOI: 10.1051/epjconf/20111604004