Lagoon Nebula M8 T tauri accretion rates Virtual Observatory Resource

Authors
  1. Kalari V.M.
  2. Vink J.S.
  3. Drew J.E.
  4. Barentsen G.
  5. Drake J.J.
  6. Eisloffel J.,Martin E.L.
  7. Parker Q.A.
  8. Unruh Y.C.
  9. Walton N.A.
  10. Wright N.J.
  11. Published by
    CDS
Abstract

We estimate the accretion rates of 235 Classical T Tauri star (CTTS) candidates in the Lagoon Nebula using ugri H{alpha} photometry from the VST Photometric H{alpha} survey+. Our sample consists of stars displaying H{alpha} excess, the intensity of which is used to derive accretion rates. For a subset of 87 stars, the intensity of the u-band excess is also used to estimate accretion rates. We find the mean variation in accretion rates measured using H{alpha} and u-band intensities to be ~0.17dex, agreeing with previous estimates (0.04-0.4dex) but for a much larger sample. The spatial distribution of CTTS align with the location of protostars and molecular gas suggesting that they retain an imprint of the natal gas fragmentation process. Strong accretors are concentrated spatially, while weak accretors are more distributed. Our results do not support the sequential star-forming processes suggested in the literature.

Keywords
  1. Open star clusters
  2. Pre-main sequence stars
  3. Accretion
  4. Infrared photometry
  5. Optical astronomy
  6. Wide-band photometry
  7. H alpha photometry
Bibliographic source Bibcode
2015MNRAS.453.1026K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/453/1026
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/453/1026
Document Object Identifer DOI

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/453/1026
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/453/1026
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/453/1026
IVOA Table Access TAP
http://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).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/453/1026/table24?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/453/1026/table24?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/453/1026/table24?

History

2016-05-17T12:34:45Z
Resource record created
2016-05-17T12:34:45Z
Created
2017-09-29T10:41:26Z
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