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Brown Dwarfs

This tag is associated with 11 posts

Cloudy with a chance of Carbon Monoxide

Tune in now for the first extrasolar weather map of a nearby brown dwarf, made using Doppler imaging.

HD 106906 image

Far Out, Dude: A Planetary-Mass Companion at 650 AU

The Magellan telescope has directly imaged a planetary-mass companion at a projected distance of 650 AU from its star! Read on to find out how the authors detected and characterized this companion, and how they think it got there.

How Massive is Kappa Andromedae B?

A “Super-Jupiter” recently discovered by direct imaging techniques may not be as it initially seemed. Hinkley et al. find the system to be older than expected and the Super-Jupiter to really be a brown dwarf.

Model to Data Comparison

Planet or Brown Dwarf? How to Measure the Mass of a Companion You Can’t See

The mass of a substellar companion can help determine whether it’s a planet or a brown dwarf. But how can you measure the mass of a companion that you can’t detect directly? Look at the disk!

DSS = Digital Sky Survey; DENIS = Deep Near IR Survey of the Southern Sky; 2MASS = 2 Micron All Sky Survey

Checking Out Our New Neighbors

A new brown dwarf system has been discovered only 2 parsec away; Gillon et al. analyze its light curve to study clouds on the surfaces of these stars.

Finding T Dwarfs with WISE

With the addition of these 87 new T dwarfs, WISE has now tripled the number of known T dwarfs with spectral type later than T5.

What’s going on in Orion’s head?

A wealth of observations tell an active accretion story within the Lambda Orionis Star Forming Region, at the head of the Orion constellation.

Examining the Fate of White Dwarf Companions

What happens to a low-mass companion when a star evolves off the main sequence to become a white dwarf?

The WISE way to deal with 2.7 million images: a public data release

The Wide-field Infrared Survey Explorer (WISE) data release promises many new and exciting discoveries!

Swirling, patchy clouds on a teenage brown dwarf

This paper describes an incredibly variable brown dwarf. To fit this variability with models, a combination of thick clouds and clearer areas are needed. This means that there are big dusty storms that cover large fractions of 2M2139’s surface!

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