2012ApJ...752...58Z -
Astrophys. J., 752, 58 (2012/June-2)
Stellar membership and dusty debris disks in the α Persei cluster.
ZUCKERMAN B., MELIS C., RHEE J.H., SCHNEIDER A. and SONG I.
Abstract (from CDS):
Because of its proximity to the Galactic plane, reliable identification of members of the α Persei cluster is often problematic. Based primarily on membership evaluations contained in six published papers, we constructed a mostly complete list of high-fidelity members of spectral type G and earlier that lie within 3 arc degrees of the cluster center. α Persei was the one nearby, rich, young open cluster not surveyed with the Spitzer Space Telescope. We examined the first and final data releases of the Wide-field Infrared Survey Explorer and found 11, or perhaps 12, α Per cluster members that have excess mid-infrared emission above the stellar photosphere attributable to an orbiting dusty debris disk. The most unusual of these is V488 Per, a K-type star with an excess IR luminosity 16% (or more) of the stellar luminosity; this is a larger excess fraction than that of any other known dusty main-sequence star. Much of the dust that orbits V488 Per is at a temperature of ∼800 K; if these grains radiate like blackbodies, then they lie only ∼0.06 AU from the star. The dust is probably the aftermath of a collision of two planetary embryos or planets with small semimajor axes; such orbital radii are similar to those of many of the transiting planets discovered by the Kepler satellite.
Abstract Copyright:
∼
Journal keyword(s):
circumstellar matter - open clusters and associations: individual: α Persei
VizieR on-line data:
<Available at CDS (J/ApJ/752/58): table1.dat table2.dat>
Simbad objects:
201
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2012ApJ...752...58Z and select 'bookmark this link' or equivalent in the popup menu