DEBRIS DISKS OF MEMBERS OF THE BLANCO 1 OPEN CLUSTER

Journal Article · Fri Aug 20 00:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/719/2/1859· OSTI ID:21457037

Stauffer, John R; Noriega-Crespo, Alberto ^[1]; Rebull, Luisa M ^[2]; James, David ^[3]; Strom, Steven ^[4]; Wolk, Scott ^[5]; Carpenter, John M ^[6]; Barrado y Navascues, David ^[7]; Micela, Giusi ^[8]; Backman, Dana ^[9]; Cargile, P A ^[10]

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1. Spitzer Science Center, Caltech 314-6, Pasadena, CA 91125 (United States)
2. Spitzer Science Center, Caltech 220-6, Pasadena, CA 91125 (United States)
3. Physics and Astronomy Department, University of Hawaii at Hilo, Hilo, HI 96720 (United States)
4. National Optical Astronomy Observatories, Tucson, AZ 85721 (United States)
5. Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 (United States)
6. Astronomy Department, Caltech, Pasadena, CA 91125 (United States)
7. Calar Alto Observatory, Centro Astronomico Hispano Aleman, C/Jesus Durban Remon, E-04004 AlmerIa (Spain)
8. INAF-Osservatorio Astronomico di Palermo Giuseppe S. Vaiana, Piazza Parlamento 1, 90134 Palermo (Italy)
9. Stratospheric Observatory for Infrared Astronomy and SETI Institute, 515 North Whisman Road, Mountain View, CA 94043 (United States)
10. Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235 (United States)

We have used the Spitzer Space Telescope to obtain Multiband Imaging Photometer for Spitzer (MIPS) 24 {mu}m photometry for 37 members of the {approx}100 Myr old open cluster Blanco 1. For the brightest 25 of these stars (where we have 3{sigma} uncertainties less than 15%), we find significant mid-IR excesses for eight stars, corresponding to a debris disk detection frequency of about 32%. The stars with excesses include two A stars, four F dwarfs, and two G dwarfs. The most significant linkage between 24 {mu}m excess and any other stellar property for our Blanco 1 sample of stars is with binarity. Blanco 1 members that are photometric binaries show few or no detected 24 {mu}m excesses whereas a quarter of the apparently single Blanco 1 members do have excesses. We have examined the MIPS data for two other clusters of similar age to Blanco 1-NGC 2547 and the Pleiades. The AFGK photometric binary star members of both of these clusters also show a much lower frequency of 24 {mu}m excesses compared to stars that lie near the single-star main sequence. We provide a new determination of the relation between the V - K {sub s} color and K {sub s} - [24] color for main sequence photospheres based on Hyades members observed with MIPS. As a result of our analysis of the Hyades data, we identify three low mass Hyades members as candidates for having debris disks near the MIPS detection limit.

• OSTI ID: 21457037
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 719; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ATMOSPHERES
BINARY STARS
COLOR
MASS
MEASURING INSTRUMENTS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHOTOMETERS
PHOTOMETRY
PHOTOSPHERE
PHYSICAL PROPERTIES
SOLAR ATMOSPHERE
STARS
STELLAR ATMOSPHERES
TELESCOPES