New SpeX Observations of M7-L6 Dwarfs Virtual Observatory Resource

Authors
  1. Bardalez Gagliuffi D.C.
  2. Burgasser A.J.
  3. Gelino C.R.
  4. Looper D.L.,Nicholls C.P.
  5. Schmidt S.J.
  6. Cruz K.
  7. West A.A.
  8. Gizis J.E.
  9. Metchev S.
  10. Published by
    CDS
Abstract

Multiplicity is a key statistic for understanding the formation of very low mass (VLM) stars and brown dwarfs. Currently, the separation distribution of VLM binaries remains poorly constrained at small separations (<=1 AU), leading to uncertainty in the overall binary fraction. We approach this problem by searching for late-M/early-L plus T dwarf spectral binaries whose combined light spectra exhibit distinct peculiarities, allowing for separation-independent identification. We define a set of spectral indices designed to identify these systems, and we use a spectral template fitting method to confirm and characterize spectral binary candidates from a library of 815 spectra from the SpeX Prism Spectral Libraries. We present 11 new binary candidates, confirm 3 previously reported candidates, and rule out 2 previously identified candidates, all with primary and secondary spectral types in the range M7-L7 and T1-T8, respectively. We find that subdwarfs and blue L dwarfs are the primary contaminants in our sample and propose a method for segregating these sources. If confirmed by follow-up observations, these systems may add to the growing list of tight separation binaries, whose orbital properties may yield further insight into brown dwarf formation scenarios.

Keywords
  1. dwarf-stars
  2. multiple-stars
  3. stellar-spectral-types
  4. infrared-photometry
Bibliographic source Bibcode
2014ApJ...794..143B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/143
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/794/143
Document Object Identifer DOI
doi:10.26093/cds/vizier.17940143

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/143
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/143
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/143
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/794/143/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/143/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/143/table2?

History

2017-05-19T15:01:57Z
Resource record created
2017-05-19T15:01:57Z
Created
2018-01-23T07:10:53Z
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