Cold faint debris discs from Herschel

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Cold faint debris discs from Herschel

Post by Lazarus on 24th October 2011, 5:55 pm

Herschel discovery of a new class of cold, faint debris discs

Alpha Mensae, HD 88230 and HD 210277.

HD 210277 has an eccentric giant planet, there were previous claims of a debris disc that did not hold up. The newly-discovered disc doesn't seem to match the properties of the earlier claim however.
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Re: Cold faint debris discs from Herschel

Post by Edasich on 25th October 2011, 4:21 am

Alpha Mensae's disc seems weird. Laying beyond 80-90 AUs (if I type correctly) with the stellar companion at nearly 36 AUs...
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Re: Cold faint debris discs from Herschel

Post by Lazarus on 25th October 2011, 5:05 pm

The 30.9 AU distance (from here) is a projected separation in the sky plane, true separation could be much larger as the relative distances of the stars are unknown. Course this could mess up the interpretation of the infrared excess...
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Re: Cold faint debris discs from Herschel

Post by Lazarus on 12th August 2013, 5:56 pm

The Herschel Cold Debris Disks
http://arxiv.org/abs/1308.1954

Seem to be a few problems with the debris disc hypothesis: contamination from background sources or IR cirrus is consistent.

For HD 210277 this is starting to look like a trend Wink
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Re: Cold faint debris discs from Herschel

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