The Formation and Evolution of Planetary Systems (FEPS): Discovery of an unusual debris system associated with HD 12039

Dean C. Hines; Dana E. Backman; Jeroen Bouwman; Lynne A. Hillenbrand; John M. Carpenter; Michael R. Meyer; Jinyoung Serena Kim; Murray D. Silverstone; Jens Rodmann; Sebastian Wolf; Eric E. Mamajek; Timothy Y. Brooke; Deborah L. Padgett; Thomas Henning; Amaya Moro-Martín; E. Stobie; Karl D. Gordon; J. E. Morrison; J. Muzerolle; K. Y.L. Su

doi:10.1086/498929

The Formation and Evolution of Planetary Systems (FEPS): Discovery of an unusual debris system associated with HD 12039

Dean C. Hines, Dana E. Backman, Jeroen Bouwman, Lynne A. Hillenbrand, John M. Carpenter, Michael R. Meyer, Jinyoung Serena Kim, Murray D. Silverstone, Jens Rodmann, Sebastian Wolf, Eric E. Mamajek, Timothy Y. Brooke, Deborah L. Padgett, Thomas Henning, Amaya Moro-Martín, E. Stobie, Karl D. Gordon, J. E. Morrison, J. Muzerolle, K. Y.L. Su

Steward Observatory

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Abstract

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 ∼ 110K, 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 a ∼ 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 10² yr.

Original language	English (US)
Pages (from-to)	1070-1079
Number of pages	10
Journal	Astrophysical Journal
Volume	638
Issue number	2 I
DOIs	https://doi.org/10.1086/498929
State	Published - Feb 20 2006

Keywords

Circumstellar matter
Infrared: stars
Planetary systems: protoplanetary disks
Stars: individual (HD 12039)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Hines, D. C., Backman, D. E., Bouwman, J., Hillenbrand, L. A., Carpenter, J. M., Meyer, M. R., Kim, J. S., Silverstone, M. D., Rodmann, J., Wolf, S., Mamajek, E. E., Brooke, T. Y., Padgett, D. L., Henning, T., Moro-Martín, A., Stobie, E., Gordon, K. D., Morrison, J. E., Muzerolle, J., & 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 I), 1070-1079. https://doi.org/10.1086/498929

Hines, DC, Backman, DE, Bouwman, J, Hillenbrand, LA, Carpenter, JM, Meyer, MR, Kim, JS, Silverstone, MD, Rodmann, J, Wolf, S, Mamajek, EE, Brooke, TY, Padgett, DL, Henning, T, Moro-Martín, A, Stobie, E, Gordon, KD, Morrison, JE, Muzerolle, J & Su, KYL 2006, 'The Formation and Evolution of Planetary Systems (FEPS): Discovery of an unusual debris system associated with HD 12039', Astrophysical Journal, vol. 638, no. 2 I, pp. 1070-1079. https://doi.org/10.1086/498929

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abstract = "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 (LIR/L* = 1 × 10 -4) above the expected photosphere for λ ≳ 14 μm is fit by thermally emitting material with a color temperature of T ∼ 110K, 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 a ∼ 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 102 yr.",

keywords = "Circumstellar matter, Infrared: stars, Planetary systems: protoplanetary disks, Stars: individual (HD 12039)",

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T1 - The Formation and Evolution of Planetary Systems (FEPS)

T2 - Discovery of an unusual debris system associated with HD 12039

AU - Hines, Dean C.

AU - Backman, Dana E.

AU - Bouwman, Jeroen

AU - Hillenbrand, Lynne A.

AU - Carpenter, John M.

AU - Meyer, Michael R.

AU - Kim, Jinyoung Serena

AU - Silverstone, Murray D.

AU - Rodmann, Jens

AU - Wolf, Sebastian

AU - Mamajek, Eric E.

AU - Brooke, Timothy Y.

AU - Padgett, Deborah L.

AU - Henning, Thomas

AU - Moro-Martín, Amaya

AU - Stobie, E.

AU - Gordon, Karl D.

AU - Morrison, J. E.

AU - Muzerolle, J.

AU - Su, K. Y.L.

PY - 2006/2/20

Y1 - 2006/2/20

N2 - 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 (LIR/L* = 1 × 10 -4) above the expected photosphere for λ ≳ 14 μm is fit by thermally emitting material with a color temperature of T ∼ 110K, 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 a ∼ 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 102 yr.

AB - 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 (LIR/L* = 1 × 10 -4) above the expected photosphere for λ ≳ 14 μm is fit by thermally emitting material with a color temperature of T ∼ 110K, 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 a ∼ 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 102 yr.

KW - Circumstellar matter

KW - Infrared: stars

KW - Planetary systems: protoplanetary disks

KW - Stars: individual (HD 12039)

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The Formation and Evolution of Planetary Systems (FEPS): Discovery of an unusual debris system associated with HD 12039

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