SDSS photometry in the field of L1457 Virtual Observatory Resource

Authors
  1. Andersson B.-G.
  2. Idzi R.
  3. Uomoto A.
  4. Wannier P.G.
  5. Chen B.
  6. Jorgensen A.M.
  7. Published by
    CDS
Abstract

We present a spectroscopic and photometric survey of a sample of field stars in the region of the molecular cloud L1457. High-quality coude feed spectra, together with five-band photometry in the Sloan Digital Sky Survey system and near-infrared archival data from the Two Micron All Sky Survey, are used to derive color excesses and distances for the stars. Based on these data, a new distance estimate of 360+/-30pc is derived for the cloud, supporting recent results by K.L. Luhman, 2001ApJ...560..287L. The data further indicate that the north-south velocity gradient seen in the millimeter-wave CO data is mirrored in a distance gradient, with the northern part of the cloud being closer to us. A second, less opaque, layer of extinction is detected at ~80pc. This distance is consistent with the earlier distance estimates to the cloud, based on Na I absorption. We identify this layer with the wall of the hot Local Bubble. Hence, the dense cloud is not, as previously thought, associated with the Local Bubble.

Keywords
  1. molecular-clouds
  2. visible-astronomy
  3. sloan-photometry
  4. Wide-band photometry
Bibliographic source Bibcode
2002AJ....124.2164A
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/124/2164
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/124/2164
Document Object Identifer DOI
doi:10.26093/cds/vizier.51242164

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/124/2164
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/124/2164
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/124/2164
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/AJ/124/2164/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/124/2164/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/124/2164/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/124/2164/table4?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/124/2164/table4?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/124/2164/table4?

History

2003-06-22T16:46:26Z
Resource record created
2003-06-22T16:46:26Z
Created
2023-04-06T16:50:51Z
Updated

Contact

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