SIMBAD references

2004ApJS..154..448G - Astrophys. J., Suppl. Ser., 154, 448-452 (2004/September-0)

New debris-disk candidates: 24 micron stellar excesses at 100 million years.

GORLOVA N., PADGETT D.L., RIEKE G.H., MUZEROLLE J., MORRISON J.E., GORDON K.D., ENGELBRACHT C.W., HINES D.C., HINZ J.C., NORIEGA-CRESPO A., REBULL L., STANSBERRY J.A., STAPELFELDT K.R., SU K.Y.L. and YOUNG E.T.

Abstract (from CDS):

Sixty-three members of the 100 Myr old open cluster M47 (NGC 2422) have been detected at 24 µm with the Spitzer Space Telescope. The Be star V 378 Pup shows an excess both in the near-infrared and at 24 µm (K-[24]=2.4 mag), probably due to free-free emission from the gaseous envelope. Seven other early-type stars show smaller excesses, K-[24]=0.6-0.9. Among late-type stars, two show large excesses: P922, a K1 V star with K-[24]=1.08±0.11, and P1121, an F9 V star with K-[24]=3.72±0.02. P1121 is the first known main-sequence star showing an excess comparable to that of β Pic, which may indicate the presence of an exceptionally massive debris disk. It is possible that a major planetesimal collision has occurred in this system, consistent with the few hundred Myr timescales estimated for the clearing of the solar system.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Galaxy: Open Clusters and Associations: Individual: Messier Number: M47 - Stars: Planetary Systems: Protoplanetary Disks

Simbad objects: 19

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2020.02.17-21:11:04

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