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

Nadya Gorlova; Deborah L. Padgett; George H. Rieke; James Muzerolle; Jane E. Morrison; Karl D. Gordon; Chad W. Engelbracht; Dean C. Hines; Joannah C. Hinz; Alberto Noriega-Crespo; Luisa Rebull; John A. Stansberry; Karl R. Stapelfeldt; Kate Y.L. Su; Erick T. Young

doi:10.1086/422822

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

Nadya Gorlova, Deborah L. Padgett, George H. Rieke, James Muzerolle, Jane E. Morrison, Karl D. Gordon, Chad W. Engelbracht, Dean C. Hines, Joannah C. Hinz, Alberto Noriega-Crespo, Luisa Rebull, John A. Stansberry, Karl R. Stapelfeldt, Kate Y.L. Su, Erick T. Young

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Abstract

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.

Original language	English (US)
Pages (from-to)	448-452
Number of pages	5
Journal	Astrophysical Journal, Supplement Series
Volume	154
Issue number	1
DOIs	https://doi.org/10.1086/422822
State	Published - Sep 2004

Keywords

Infrared: stars
Open clusters and associations: individual (M47)
Planetary systems: protoplanetary disks

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/422822

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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., & Young, E. T. (2004). New debris-disk candidates: 24 Micron stellar excesses at 100 million years. Astrophysical Journal, Supplement Series, 154(1), 448-452. https://doi.org/10.1086/422822

Gorlova, N, Padgett, DL, Rieke, GH, Muzerolle, J, Morrison, JE, Gordon, KD, Engelbracht, CW, Hines, DC, Hinz, JC, Noriega-Crespo, A, Rebull, L, Stansberry, JA, Stapelfeldt, KR, Su, KYL & Young, ET 2004, 'New debris-disk candidates: 24 Micron stellar excesses at 100 million years', Astrophysical Journal, Supplement Series, vol. 154, no. 1, pp. 448-452. https://doi.org/10.1086/422822

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title = "New debris-disk candidates: 24 Micron stellar excesses at 100 million years",

abstract = "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.",

keywords = "Infrared: stars, Open clusters and associations: individual (M47), Planetary systems: protoplanetary disks",

author = "Nadya Gorlova and Padgett, {Deborah L.} and Rieke, {George H.} and James Muzerolle and Morrison, {Jane E.} and Gordon, {Karl D.} and Engelbracht, {Chad W.} and Hines, {Dean C.} and Hinz, {Joannah C.} and Alberto Noriega-Crespo and Luisa Rebull and Stansberry, {John A.} and Stapelfeldt, {Karl R.} and Su, {Kate Y.L.} and Young, {Erick T.}",

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T2 - 24 Micron stellar excesses at 100 million years

AU - Gorlova, Nadya

AU - Padgett, Deborah L.

AU - Rieke, George H.

AU - Muzerolle, James

AU - Morrison, Jane E.

AU - Gordon, Karl D.

AU - Engelbracht, Chad W.

AU - Hines, Dean C.

AU - Hinz, Joannah C.

AU - Noriega-Crespo, Alberto

AU - Rebull, Luisa

AU - Stansberry, John A.

AU - Stapelfeldt, Karl R.

AU - Su, Kate Y.L.

AU - Young, Erick T.

PY - 2004/9

Y1 - 2004/9

N2 - 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.

AB - 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.

KW - Infrared: stars

KW - Open clusters and associations: individual (M47)

KW - Planetary systems: protoplanetary disks

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

Abstract

Keywords

ASJC Scopus subject areas

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