VRI photometry in NGC 7129 Virtual Observatory Resource

Authors
  1. Dahm S.E.
  2. Hillenbrand L.A.
  3. Published by
    CDS
Abstract

NGC7129 is a bright reflection nebula located in the molecular cloud complex near l=105.4{deg}, b=+9.9{deg}, about 1.15kpc distant. Embedded within the reflection nebula is a young cluster dominated by a compact grouping of four early-type stars: BD+65{deg}1638 (B3V), BD+65{deg}1637 (B3e), SVS 13 (B5e), and LkH{alpha} 234 (B8e). About 80 H{alpha} emission sources brighter than V~23 are identified in the region, many of which are presumably T Tauri star members of the cluster. We also present deep (V~23), optical (VR_C_I_C_) photometry of a field centered on the reflection nebula and spectral types for more than 130 sources determined from low dispersion, optical spectroscopy. The narrow pre-main sequence evident in the color-magnitude diagram suggests that star formation was rapid and coeval. A median age of about 1.8Myr is inferred for the H{alpha} and literature-identified X-ray emission sources having established spectral types, using pre-main sequence evolutionary models. Our interpretation of the structure of the molecular cloud and the distribution of young stellar objects is that BD+65{deg}1638 is primarily responsible for evacuating the blister-like cavity within the molecular cloud. LkH{alpha} 234 and several embedded sources evident in near-infrared adaptive optics imaging have formed recently within the ridge of compressed molecular gas. The compact cluster of low-mass stars formed concurrently with the early-type members, concentrated within a central radius of ~0.7pc. Star formation is simultaneously occurring in a semi-circular arc some ~3pc in radius that outlines remaining dense regions of molecular gas. High dispersion, optical spectra are presented for BD+65{deg}1638, BD+65{deg}1637, SVS 13, LkH{alpha} 234, and V350 Cep. These spectra are discussed in the context of the circumstellar environments inferred for these stars.

Keywords
  1. nebulae
  2. open-star-clusters
  3. emission-line-stars
  4. x-ray-sources
  5. infrared-photometry
  6. visible-astronomy
  7. photometry
  8. line-intensities
  9. stellar-spectral-types
Bibliographic source Bibcode
2015AJ....149..200D
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/200
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/149/200
Document Object Identifer DOI
doi:10.26093/cds/vizier.51490200

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/200
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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/149/200
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/149/200/table3?
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/149/200/table3?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/149/200/table1?
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History

2015-06-26T13:08:13Z
Resource record created
2015-06-26T13:08:13Z
Created
2018-01-04T08:22:48Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr