New M dwarf debris disk candidates in NGC 2547

Jan Forbrich; Charles J. Lada; August A. Muench; Paula S. Teixeira

doi:10.1086/592035

New M dwarf debris disk candidates in NGC 2547

Jan Forbrich
, Charles J. Lada
, August A. Muench
, Paula S. Teixeira

Physics

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

With only six known examples, M dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shallow mid-infrared observation of NGC 2547, we present a considerably deeper Spitzer MIPS image of the region, with a maximum exposure time of 15 minutes pixel^-1. Among sources selected from a previously published membership list, we identify nine new M dwarfs with excess emission at 24 μm tracing warm material close to the snow line of these stars, at orbital radii of less than 1 AU. We argue that these are likely debris disks, suggesting that planet formation is under way in these systems. Interestingly, the estimated excess fraction of M stars appears to be higher than that of G and K stars in our sample.

Original language	English
Pages (from-to)	1107-1116
Number of pages	10
Journal	Astrophysical Journal
Volume	687
Issue number	2
DOIs	https://doi.org/10.1086/592035
Publication status	Published - 10 Nov 2008

Keywords

Circumstellar matter
Infrared: stars
Open clusters and associations: individual (NGC 2547)
Planetary systems: formation

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "New M dwarf debris disk candidates in NGC 2547",

abstract = "With only six known examples, M dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shallow mid-infrared observation of NGC 2547, we present a considerably deeper Spitzer MIPS image of the region, with a maximum exposure time of 15 minutes pixel-1. Among sources selected from a previously published membership list, we identify nine new M dwarfs with excess emission at 24 μm tracing warm material close to the snow line of these stars, at orbital radii of less than 1 AU. We argue that these are likely debris disks, suggesting that planet formation is under way in these systems. Interestingly, the estimated excess fraction of M stars appears to be higher than that of G and K stars in our sample.",

keywords = "Circumstellar matter, Infrared: stars, Open clusters and associations: individual (NGC 2547), Planetary systems: formation",

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TY - JOUR

T1 - New M dwarf debris disk candidates in NGC 2547

AU - Forbrich, Jan

AU - Lada, Charles J.

AU - Muench, August A.

AU - Teixeira, Paula S.

PY - 2008/11/10

Y1 - 2008/11/10

N2 - With only six known examples, M dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shallow mid-infrared observation of NGC 2547, we present a considerably deeper Spitzer MIPS image of the region, with a maximum exposure time of 15 minutes pixel-1. Among sources selected from a previously published membership list, we identify nine new M dwarfs with excess emission at 24 μm tracing warm material close to the snow line of these stars, at orbital radii of less than 1 AU. We argue that these are likely debris disks, suggesting that planet formation is under way in these systems. Interestingly, the estimated excess fraction of M stars appears to be higher than that of G and K stars in our sample.

AB - With only six known examples, M dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shallow mid-infrared observation of NGC 2547, we present a considerably deeper Spitzer MIPS image of the region, with a maximum exposure time of 15 minutes pixel-1. Among sources selected from a previously published membership list, we identify nine new M dwarfs with excess emission at 24 μm tracing warm material close to the snow line of these stars, at orbital radii of less than 1 AU. We argue that these are likely debris disks, suggesting that planet formation is under way in these systems. Interestingly, the estimated excess fraction of M stars appears to be higher than that of G and K stars in our sample.

KW - Circumstellar matter

KW - Infrared: stars

KW - Open clusters and associations: individual (NGC 2547)

KW - Planetary systems: formation

UR - https://www.scopus.com/pages/publications/55849145861

UR - https://ui.adsabs.harvard.edu/abs/2008ApJ...687.1107F/abstract

U2 - 10.1086/592035

DO - 10.1086/592035

M3 - Article

AN - SCOPUS:55849145861

SN - 0004-637X

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SP - 1107

EP - 1116

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

New M dwarf debris disk candidates in NGC 2547

Abstract

Keywords

ASJC Scopus subject areas

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