Results 91 to 100 of about 1,220,192 (373)
The Minimum Jeans Mass, Brown Dwarf Companion IMF, and Predictions for Detection of Y-type Dwarfs
, 2008 Cool L- and T-type objects were discovered first as companions to stars in 1988 and 1995, respectively. A certain example of the yet cooler Y-type spectral class (Teff
Allen +74 more
core +1 more source
SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition [PDF]
, 2009 We report the identification of 17 candidate brown dwarf binaries whose components straddle the L dwarf/T dwarf transition. These sources were culled from a large near-infrared spectral sample of L and T dwarfs observed with the Infrared Telescope ...
Ackerman +115 more
core +4 more sources
THE FIRST SPECTRUM OF THE COLDEST BROWN DWARF [PDF]
, 2016 The recently discovered brown dwarf WISE 0855 presents the first opportunity to directly study an object outside the solar system that is nearly as cold as our own gas giant planets.
A. Skemer +8 more
semanticscholar +1 more source
The Search for Brown Dwarfs around White Dwarfs [PDF]
Symposium - International Astronomical Union, 2003 The infrared search for substellar companions to nearby white dwarfs has been going on for a little more than a decade. The most recent phase has been a wide field proper motion search carried out primarily at Steward Observatory, where we are complete down to J = 18. Earlier phases included near field searches at the IRTF and Keck Observatory.
E. E. Becklin, Jay Farihi, Ben Zuckerman
openaire +3 more sources
Advanced Intelligent Systems, EarlyView.This study presents Hi‐LabSpermTracking, a long‐duration, expert‐annotated sperm motility dataset for detection and tracking. It evaluates You Only Look Once version 8, Real‐Time Detection Transformer, and Simple Online and Realtime Tracking with a Deep Association Metric in three scenarios. The mean ensemble method improves tracking performance. Sperm
Abdulsamet Aktas +5 more
wiley +1 more source
SOLES XII. The Aligned Orbit of TOI-2533 b, a Transiting Brown Dwarf Orbiting an F8-type Star
The Astronomical JournalBrown dwarfs occupy a middle ground in mass space between gaseous giant planets and ultracool dwarf stars, and the characterisation of their orbital orientations may shed light on how these neighbouring objects form.
Thiago Ferreira dos Santos +3 more
doaj +1 more source
EPJ Web of Conferences, 2011 From radial velocity (RV) detections alone one does not get all orbital parameters needed to derive the true mass of a non-transiting, unresolved substellar companion to a star.
Kürster M., Meyer E.
doaj +1 more source
Exploring the brown dwarf desert : new substellar companions from the SDSS-III MARVELS survey [PDF]
, 2017 Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ~5 AU in the mass range of ~10 - 80 M$_{\text{Jup}}$. This deficit, known as the brown dwarf desert, currently has no conclusive explanation.
N. Grieves +29 more
semanticscholar +1 more source
American Journal of Medical Genetics Part C: Seminars in Medical Genetics, EarlyView.ABSTRACT Turner syndrome (TS) is frequently complicated by congenital heart disease (CHD). While left‐sided lesions such as bicuspid aortic valve (BAV) and coarctation of the aorta are the most common structural heart lesions in TS, other anomalies, such as aortic arch malformations, hypoplastic left heart syndrome (HLHS), persistent left superior vena
Katya de Groote +9 more
wiley +1 more source
The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and Formation Mechanism
, 2011 We have combined multi-epoch images from the Infrared Side Port Imager on the CTIO 4-meter telescope to derive a 3-sigma limit of J=21.7 for the ultra cool brown dwarf companion to WD 0806-661 (GJ 3483).
Melis, Carl +3 more
core +1 more source