Confirmation of the proto-brown dwarf SSTB213-J041757B and discovery of a nearby new candidate with ALMA and CARMA
Authors/Creators
- 1. Instituto de Radioastronomía y Astrofísica, UNAM, Mexico
- 2. Instituto Argentino de Radioastronomía, Argentina
- 3. Private affiliation
- 4. European Southern Observatory, Chile
- 5. Centro de Astrobiología, CSIC-INTA, España
- 6. Centro de Astrobiología, CSIC-INTA, Spain
- 7. European Southern Observatory, Germany
- 8. Universidad de Chile, Chile
- 9. Université de Bordeaux, France
Contributors
Editor (3):
Description
How Brown Dwarfs (BDs) form is still an unresolved question. In order to shed light into the different possible mechanisms for BD formation, it is essential to identify bona-fide BDs in their earliest evolutionary stages, the so-called proto-BDs, equivalent to objects in the Class 0 and Class I stages of young stellar objects. We conducted CARMA observations at 3 and 1 mm and several transitions, along with ALMA observations at 1 mm and CO(2-1) towards a debated proto-BD candidate in the Taurus molecular cloud. Both ALMA and CARMA observations reveal signs of outflow emission driven by the proto-BD candidate. In addition, CARMA allowed to discover a new proto-BD candidate about 50 arcsec to the northeast, that also seems to drive a molecular outflow. A comparison of the outflow momentum rate of these two proto-BD candidates with those of well-known young stellar objects indicates that this parameter falls at the expected relation according to their lower luminosity. Overall, these observations allow to add two proto-BDs in the short list of proto-BDs known to date, and suggest that BDs seem to form as a scaled-down version of low-mass stars. Funded by the UNAM-PAPIIT IN111421 grant.
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Additional details
References
- Barrado, D. et al. (2009), A&A, 508, 859
- Palau, A. et al. (2012), MNRAS, 424, 2778