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The Formation and Evolution of Planetary Systems (FEPS): Discovery of an Unusual Debris System Associated with HD 12039

Hines, Dean C. and Backman, Dana E. and Bouwman, Jeroen and Hillenbrand, Lynne A. and Carpenter, John M. and Meyer, Michael R. and Kim, Jinyoung Serena and Silverstone, Murray D. and Rodmann, Jens and Wolf, Sebastian and Mamajek, Eric E. and Brooke, Timothy Y. and Padgett, Deborah L. and Henning, Thomas and Moro-Martín, Amaya and Stobie, E. B. and Gordon, Karl D. and Morrison, J. E. and Muzerolle, J. and Su, K. Y. L. (2006) The Formation and Evolution of Planetary Systems (FEPS): Discovery of an Unusual Debris System Associated with HD 12039. Astrophysical Journal, 638 (2). pp. 1070-1079. ISSN 0004-637X. doi:10.1086/498929.

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We report the discovery of a debris system associated with the ~30 Myr old G3/5V star HD 12039 using Spitzer Space Telescope observations from 3.6-160 μm. An observed infrared excess (L_(IR)/L^* = 1 × 10^(-4)) above the expected photosphere for λ ≳ 14 μm is fit by thermally emitting material with a color temperature of T ~ 110 K, warmer than the majority of debris disks identified to date around Sun-like stars. The object is not detected at 70 μm with a 3 σ upper limit 6 times the expected photospheric flux. The spectrum of the infrared excess can be explained by warm, optically thin material comprised of blackbody-like grains of size ≳ 7 μm that reside in a belt orbiting the star at 4-6 AU. An alternate model dominated by smaller grains, near the blowout size ɑ ~ 0.5 μm, located at 30-40 AU is also possible but requires the dust to have been produced recently, since such small grains will be expelled from the system by radiation pressure in approximately a few times 10^2 yr.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Hines, Dean C.0000-0003-4653-6161
Carpenter, John M.0000-0003-2251-0602
Meyer, Michael R.0000-0003-1227-3084
Mamajek, Eric E.0000-0003-2008-1488
Padgett, Deborah L.0000-0001-5334-5107
Moro-Martín, Amaya0000-0001-9504-8426
Muzerolle, J.0000-0002-5943-1222
Su, K. Y. L.0000-0002-3532-5580
Additional Information:© 2006 American Astronomical Society. Received 2005 March 3. Accepted 2005 October 8. It is a pleasure to acknowledge all the members of the FEPS legacy science team for their contributions to the project. We thank C. Beichman for sharing information about HD 69830 prior to publication and an anonymous referee whose constructive criticism helped to improve our presentation. This work has used the SIMBAD databases, and is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under NASA contract 1407. Our investigation has also made use of data products from the Two Micron All Sky Survey (2MASS), which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center, California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. FEPS is pleased to acknowledge support from NASA contracts 1224768, 1224634, and 1224566 administered through JPL. The MPIA team is supported by the EU-RTN-HPRN-CT-2002-00308 PLANETS network and the German Research Foundation (DFG) through the Emmy Noether grant WO 857/2-1.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
European UnionEU-RTN-HPRN-CT-2002-00308
Deutsche Forschungsgemeinschaft (DFG)WO 857/2-1
Subject Keywords:circumstellar matter; infrared: stars; planetary systems: protoplanetary disks; stars: individual (HD 12039)
Issue or Number:2
Record Number:CaltechAUTHORS:20170801-111149716
Persistent URL:
Official Citation:Dean C. Hines et al 2006 ApJ 638 1070
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79685
Deposited By: Ruth Sustaita
Deposited On:01 Aug 2017 19:01
Last Modified:15 Nov 2021 17:49

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