Sentences with phrase «young brown dwarfs»

Young brown dwarfs: testing star formation across environments Koraljka Muzic 2017 October 03, 15:30 IA / U.

Abstract: We aim to characterize the U-band variability of young brown dwarfs in the Taurus Molecular Cloud and discuss its origin.

SPHERE opens new horizons in the study of young brown dwarfs and giant exoplanets thanks to high - contrast imaging capabilities at optical and near - infrared wavelengths, as well as high signal - to - noise spectroscopy in the near - infrared from low (R ~ 30 - 50) to medium resolutions (R ~ 350).

Although radial velocities (and parallaxes, for some) are still needed to fully assess membership, these new objects provide valuable insight into the spectral characteristics and evolution of young brown dwarfs.

We present here our search methods and spectroscopic follow - up of our high - priority c... ▽ More We are conducting a proper - motion survey for young brown dwarfs in the Taurus - Auriga molecular cloud based on the Pan-STARRS1 3 $ \ pi $ Survey.

The Pan-STARRS1 Proper - motion Survey for Young Brown Dwarfs in Nearby Star - forming Regions.

If confirmed, any of these would be among the coolest known YMG members and would help to determine the effective temperature at which young brown dwarfs cross the L / T transition.

New work surveyed various properties of 152 suspected young brown dwarfs in order to categorize their diversity and found that atmospheric properties may be behind much of their differences.

New work led by Carnegie's Jacqueline Faherty surveyed various properties of 152 suspected young brown dwarfs in order to categorize their diversity and found that atmospheric properties may be behind much of their differences, a discovery that may apply to planets outside the solar system as well.

There's an intriguing twist, too: Jayawardhana and others have shown that young brown dwarfs generally do not have massive protoplanetary disks of gas and dust, which means that if the new object is indeed a planet, it may not have formed the same way planets in our solar system did.

A dusty disk girdles a young brown dwarf with just 15 times Jupiter's mass, in this artist's conception.

By quantifying the observable properties of so many young brown dwarf candidates, Faherty and her team — including Carnegie's Jonathan Gagné and Alycia Weinberger — were able to show that these objects have vast diversity of color, spectral features, and more.

We discuss the possible sources of U-band variability for this young brown dwarf, namely a magnetic flare, non-steady accretion onto the substellar surface, and rotational modulation of a hot spot.

Not exact matches

Like young stars, brown dwarfs are surrounded by protoplanetary disks in this artist conception.

«The infancies of brown dwarfs are remarkably similar to the infancies of young, sunlike stars.»

Methane Brown Dwarfs - While brown dwarfs have too little mass to fuse «regular» hydrogen (which has a single proton nucleus), virtually all of the ones discovered until 1999 were too hot — that is «young» — to show evidence of methane which is destroyed by stellar temperatBrown Dwarfs - While brown dwarfs have too little mass to fuse «regular» hydrogen (which has a single proton nucleus), virtually all of the ones discovered until 1999 were too hot — that is «young» — to show evidence of methane which is destroyed by stellar temperaDwarfs - While brown dwarfs have too little mass to fuse «regular» hydrogen (which has a single proton nucleus), virtually all of the ones discovered until 1999 were too hot — that is «young» — to show evidence of methane which is destroyed by stellar temperatbrown dwarfs have too little mass to fuse «regular» hydrogen (which has a single proton nucleus), virtually all of the ones discovered until 1999 were too hot — that is «young» — to show evidence of methane which is destroyed by stellar temperadwarfs have too little mass to fuse «regular» hydrogen (which has a single proton nucleus), virtually all of the ones discovered until 1999 were too hot — that is «young» — to show evidence of methane which is destroyed by stellar temperatures.

I will after present 1D and 3D self - consistent cloud models, which allow to explain several observations of brown dwarfs, directly imaged young exoplanets and warm transiting exoplanets.

Abstract: Substellar members of young ($ \ lesssim $ 150 Myr) moving groups are valuable benchmarks to empirically define brown dwarf evolution with age and to study the low - mass end of the initial mass function.

As a byproduct we have determined a temperature scale for young M, very low - mass stars and brown dwarfs.

We used NaCo at VLT to explore t... ▽ More In anticipation of the VLT / SPHERE planet imager guaranteed time programs, we have conducted a preparatory survey of 86 stars between 2009 and 2013 in order to identify new faint comoving companions to ultimately carry out a comprehensive analysis of the occurence of giant planets and brown dwarf companions at wide (10 - 2000 AU) orbits around young, solar - type stars.

Spectral energy distribution simulations of a possible ring structure around the young, red brown dwarf G196 - 3B

Stassun was cited «for helping to substantially increase Ph.D. attainment in physics and astronomy for underrepresented minorities, and for fundamental contributions to the astrophysics of young stars and brown dwarfs.»

Abstract: We performed a deep wide field optical survey of the young (~ 100 - 150 Myr) open cluster Blanco1 to study its low mass population well down into the brown dwarf regime and estimate its mass function over the whole cluster mass range.The survey covers 2.3 square degrees in the I and z - bands down to I ~ z ~ 24 with the CFH12K camera.

Considering two different cluster ages (100 and 150 Myr), we selec... ▽ More We performed a deep wide field optical survey of the young (~ 100 - 150 Myr) open cluster Blanco1 to study its low mass population well down into the brown dwarf regime and estimate its mass function over the whole cluster mass range.The survey covers 2.3 square degrees in the I and z - bands down to I ~ z ~ 24 with the CFH12K camera.