A study of intermediate-mass stars in Trumpler 37

Maria. E. Contreras; Aurora Sicilia-Aguilar; James Muzerolle; Nuria Calvet; Perry Berlind; Lee Hartmann

doi:10.1086/341825

A study of intermediate-mass stars in Trumpler 37

Maria. E. Contreras (Lead / Corresponding author), Aurora Sicilia-Aguilar, James Muzerolle, Nuria Calvet, Perry Berlind, Lee Hartmann

Physics

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Abstract

We present results from optical spectra for intermediate-mass stars in the young cluster Trumpler 37. The spectroscopy presented helps to re ne the membership, reddening ( A(V) similar to 1.5 +/- 0.5), and distance modulus [ (m-M) = 9. 7 +/- 0.2] to this cluster. Only three new emission-line stars were found in our sample, resulting in a total of four stars in the cluster with emission lines and spectral type earlier than G. One of these emission-line stars, LkHalpha 349, is probably not a member of the central cluster, since it lies within a dark globule on the periphery of the H II region IC 1396. Thus, at an age of about 3 Myr, as estimated from the expansion age of molecular material around the cluster, emission-line phenomena possibly driven by disk accretion are extremely rare through spectral types F (masses not greater than or equal to 1.5 M-circle dot).

Original language	English
Pages (from-to)	1585-1592
Number of pages	8
Journal	Astronomical Journal
Volume	124
Issue number	3
DOIs	https://doi.org/10.1086/341825
Publication status	Published - Sept 2002

Keywords

circumstellar matter color-magnitude diagrams stars : early-type stars : emission-line, Be ALPHA EMISSION STARS CIRCUMSTELLAR DISKS PROTOSTELLAR DISKS CLUSTER TRUMPLER-37 DUST PROPERTIES AE/BE STARS AE STARS PHOTOEVAPORATION SYSTEMS RESOLUTION

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10.1086/341825

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title = "A study of intermediate-mass stars in Trumpler 37",

abstract = "We present results from optical spectra for intermediate-mass stars in the young cluster Trumpler 37. The spectroscopy presented helps to re ne the membership, reddening ( A(V) similar to 1.5 +/- 0.5), and distance modulus [ (m-M) = 9. 7 +/- 0.2] to this cluster. Only three new emission-line stars were found in our sample, resulting in a total of four stars in the cluster with emission lines and spectral type earlier than G. One of these emission-line stars, LkHalpha 349, is probably not a member of the central cluster, since it lies within a dark globule on the periphery of the H II region IC 1396. Thus, at an age of about 3 Myr, as estimated from the expansion age of molecular material around the cluster, emission-line phenomena possibly driven by disk accretion are extremely rare through spectral types F (masses not greater than or equal to 1.5 M-circle dot).",

keywords = "circumstellar matter color-magnitude diagrams stars : early-type stars : emission-line, Be ALPHA EMISSION STARS CIRCUMSTELLAR DISKS PROTOSTELLAR DISKS CLUSTER TRUMPLER-37 DUST PROPERTIES AE/BE STARS AE STARS PHOTOEVAPORATION SYSTEMS RESOLUTION",

author = "Contreras, {Maria. E.} and Aurora Sicilia-Aguilar and James Muzerolle and Nuria Calvet and Perry Berlind and Lee Hartmann",

year = "2002",

month = sep,

doi = "10.1086/341825",

language = "English",

volume = "124",

pages = "1585--1592",

journal = "Astronomical Journal",

issn = "1538-3881",

publisher = "American Astronomical Society",

number = "3",

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TY - JOUR

T1 - A study of intermediate-mass stars in Trumpler 37

AU - Contreras, Maria. E.

AU - Sicilia-Aguilar, Aurora

AU - Muzerolle, James

AU - Calvet, Nuria

AU - Berlind, Perry

AU - Hartmann, Lee

PY - 2002/9

Y1 - 2002/9

N2 - We present results from optical spectra for intermediate-mass stars in the young cluster Trumpler 37. The spectroscopy presented helps to re ne the membership, reddening ( A(V) similar to 1.5 +/- 0.5), and distance modulus [ (m-M) = 9. 7 +/- 0.2] to this cluster. Only three new emission-line stars were found in our sample, resulting in a total of four stars in the cluster with emission lines and spectral type earlier than G. One of these emission-line stars, LkHalpha 349, is probably not a member of the central cluster, since it lies within a dark globule on the periphery of the H II region IC 1396. Thus, at an age of about 3 Myr, as estimated from the expansion age of molecular material around the cluster, emission-line phenomena possibly driven by disk accretion are extremely rare through spectral types F (masses not greater than or equal to 1.5 M-circle dot).

AB - We present results from optical spectra for intermediate-mass stars in the young cluster Trumpler 37. The spectroscopy presented helps to re ne the membership, reddening ( A(V) similar to 1.5 +/- 0.5), and distance modulus [ (m-M) = 9. 7 +/- 0.2] to this cluster. Only three new emission-line stars were found in our sample, resulting in a total of four stars in the cluster with emission lines and spectral type earlier than G. One of these emission-line stars, LkHalpha 349, is probably not a member of the central cluster, since it lies within a dark globule on the periphery of the H II region IC 1396. Thus, at an age of about 3 Myr, as estimated from the expansion age of molecular material around the cluster, emission-line phenomena possibly driven by disk accretion are extremely rare through spectral types F (masses not greater than or equal to 1.5 M-circle dot).

KW - circumstellar matter color-magnitude diagrams stars : early-type stars : emission-line, Be ALPHA EMISSION STARS CIRCUMSTELLAR DISKS PROTOSTELLAR DISKS CLUSTER TRUMPLER-37 DUST PROPERTIES AE/BE STARS AE STARS PHOTOEVAPORATION SYSTEMS RESOLUTION

U2 - 10.1086/341825

DO - 10.1086/341825

M3 - Article

SN - 1538-3881

VL - 124

SP - 1585

EP - 1592

JO - Astronomical Journal

JF - Astronomical Journal

IS - 3

ER -

A study of intermediate-mass stars in Trumpler 37

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Keywords

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