First Global Map Outside the Solar System 19
First time accepted submitter Kreuzfeld writes "For many years, astronomers have suspected that brown dwarfs — 'failed stars' with masses between those of planets and stars — have cloudy atmospheres. Our recent paper in Nature presents the first global, 2D map of the patchy clouds in the atmosphere of a brown dwarf: our neighbor, the 6.5 light-years-distant Luhman 16B. Eventually, astronomers will use this technique to make weather movies of global cloud patterns on brown dwarfs and extrasolar planets."
Re: (Score:2)
The red version is much better.
How is this a "global map" ? (Score:1)
Re: (Score:2)
the stars are globe shaped.
Not so different? (Score:2)
Except for the vast orders of magnitude difference in which speed at which the two move, you're almost correct.
curious orientation (Score:5, Interesting)
The large scale structure seems to stretch between the poles, at fairly constant longitude, rather than around the axis at fairly constant latitude, like every other atmosphere we've encountered. Is there some reason they are really that way, or is it some artifact of the data gathering and rerduction?
Re:curious orientation (Score:5, Informative)
Good question! Atmospheric scientists aren't actually sure yet whether brown dwarfs should have "bands" like we see on Jupiter and other Solar system gas giants (this was discussed at a meeting in Washington, D.C. Jan 2014) -- and our mapping data wasn't quite sensitive enough to definitively answer that question. (We're less sensitive to axisymmetric features than we are to longitudinal variations). The vertical "stretching" of the map's features toward the poles is an unavoidable artifact of our analysis technique [wikipedia.org]. Cloud patterns may be less elongated than they appear!
Re: (Score:2)
Still, congratulations. It's amazing that we've gone from stars visible only as a single pixel to being able to detect surface features.
This is why I love slashdot (Score:1)
This is why I love Slashdot: Comments by the scientists involved! Thanks for your hard work guys!
Re: (Score:2)
That's pretty normal for two testicles as well, you know. Although I'm only familiar with monopole structure.
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Old Map... (Score:1)
This map is 6.5 years old already.
Starcraft (Score:2)
Re: (Score:1)
The flat (Mercator-projected) map of Luhman 16B is available here for download [mpia-hd.mpg.de]. Feel free to import it into whatever program or game you prefer!
Other dwarfs (Score:1)