YSOs search in LDN 1340 in optical Virtual Observatory Resource

Authors
  1. Kun M.
  2. Moor A.
  3. Szegedi-Elek E.
  4. Reipurth B.
  5. Published by
    CDS
Abstract

We have performed an optical spectroscopic and photometric search for young stellar objects associated with the molecular cloud Lynds 1340, and examined the structure of the cloud by constructing an extinction map, based on SDSS data. The new extinction map suggests a shallow, strongly fragmented cloud, having a mass of some 3700M_{sun}_. Longslit spectroscopic observations of the brightest stars over the area of L1340 revealed that the most massive star associated with L1340 is a B4-type, ~5M_{sun}_ star. The new spectroscopic and photometric data of the intermediate-mass members led to a revised distance of 825_-80_^+110^pc, and revealed seven members of the young stellar population with M>~2M_{sun}_. Our search for H{alpha} emission line stars, conducted with the Wide Field Grism Spectrograph 2 on the 2.2m telescope of the University of Hawaii and covering a 30'x40' area, resulted in the detection of 75 candidate low-mass pre-main sequence stars, 58 of which are new. We constructed spectral energy distributions (SEDs) of our target stars, based on SDSS, 2MASS, Spitzer, and WISE photometric data, derived their spectral types, extinctions, and luminosities from BVRIJ fluxes, estimated masses by means of pre-main sequence evolutionary models, and examined the disk properties utilizing the 2-24{mu}m interval of the SED. We measured the equivalent width of the H{alpha} lines and derived accretion rates. The optically selected sample of pre-main sequence stars has a median effective temperature of 3970K, a stellar mass of 0.7M_{sun}_, and an accretion rate of 7.6x10^-9^M_{sun}_/yr.

Keywords
  1. young-stellar-objects
  2. infrared-photometry
  3. visible-astronomy
  4. Wide-band photometry
  5. spectroscopy
  6. stellar-spectral-types
  7. stellar-masses
  8. line-intensities
Bibliographic source Bibcode
2016ApJ...822...79K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/822/79
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/822/79
Document Object Identifer DOI
doi:10.26093/cds/vizier.18220079

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/822/79
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/822/79
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/822/79
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/822/79/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/822/79/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/822/79/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/822/79/emstars?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/822/79/emstars?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/822/79/emstars?

History

2016-08-19T07:17:39Z
Resource record created
2016-08-19T07:17:39Z
Created
2018-11-15T12:36:41Z
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