First detection of thermal radiojets in a sample of proto-brown dwarf candidates
Entity
UAM. Departamento de Física TeóricaPublisher
Institute of Physics PublishingDate
2015-07-01Citation
10.1088/0004-637X/807/1/55
The Astrophysical Journal 807.1 (2015): 55
ISSN
0004-637X (print); 1538-4357 (online)DOI
10.1088/0004-637X/807/1/55Funded by
This work is based in part on data obtained as part of the UKIRT Infrared Deep Sky Survey. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. O. Morata is supported by the MOST (Ministry of Science and Technology, Taiwan) ALMA-T grant MOST 103-2119-M-001-010-MY to the Institute of Astronomy & Astrophysics, Academia Sinica. A. Palau acknowledges financial support from UNAM-DGAPA-PAPIIT IA102815 grant, México. I. de Gregorio is supported by MICINN (Spain) grant AYA2011-30228-C03-01. R.F. González is funded by UNAM/PAPIIT grant IN112014. H. Bouy is funded by the the Ramón y Cajal fellowship program number RYC-2009-04497. H. Bouy, D. Barrado, N. Huélamo, and M. Morales Calderón are supported by MICINN (Spain) grant AYA2012-38897-C02-01. A. Bayo acknowledges financial support from the Proyecto Fondecyt de Iniciación 11140572. L. F. Rodríguez acknowledges the financial support from UNAM, and CONACyT, MéxicoProject
Gobierno de España. AYA2011-30228-C03-01; Gobierno de España. RYC-2009-04497; Gobierno de España. AYA2012-38897-C02-01Editor's Version
http://dx.doi.org/10.1088/0004-637X/807/1/55Subjects
ISM: individual objects (J041757, J041836, J041847, J041938); ISM: jets and outflows; Radio continuum: ISM; Stars: formation; Stars: protostars; FísicaNote
The Astrophysical Journal 807.1 (2015): 55 reproduced by permission of the AASRights
© 2015. The American Astronomical SocietyAbstract
We observed with the Jansky Very Large Array at 3.6 and 1.3 cm a sample of 11 proto-brown dwarf (BD) candidates in Taurus in a search for thermal radio jets driven by the most embedded BDs. We detected for the first time four thermal radio jets in proto-BD candidates. We compiled data from UKIDSS, 2MASS, Spitzer, WISE, and Herschel to build the spectral energy distribution (SED) of the objects in our sample, which are similar to typical Class I SEDs of young stellar objects (YSOs). The four proto-BD candidates driving thermal radio jets also roughly follow the well-known trend of centimeter luminosity against bolometric luminosity determined for YSOs, assuming they belong to Taurus, although they present some excess of radio emission compared to the known relation for YSOs. Nonetheless, we are able to reproduce the flux densities of the radio jets modeling the centimeter emission of the thermal radio jets using the same type of models applied to YSOs, but with corresponding smaller stellar wind velocities and mass-loss rates, and exploring different possible geometries of the wind or outflow from the star. Moreover, we also find that the modeled mass outflow rates for the bolometric luminosities of our objects agree reasonably well with the trends found between the mass outflow rates and bolometric luminosities of YSOs, which indicates that, despite the "excess" centimeter emission, the intrinsic properties of proto-BDs are consistent with a continuation of those of very low-mass stars to a lower mass range. Overall, our study favors the formation of BDs as a scaled-down version of low-mass stars
Files in this item
Google Scholar:Morata, Oscar
-
Palau, Aina
-
González, Ricardo F.
-
De Gregorio-Monsalvo, Itziar
-
Ribas, Álvaro
-
Perger, Manuel
-
Bouy, Hervé
-
Barrado, David
-
Eiroa, Carlos
-
Bayo, Amelia
-
Huélamo, Nuria
-
Morales-Calderón, María
-
Rodríguez, Luís F.
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.
-
A search for pre-substellar cores and proto-brown dwarf candidates in Taurus: Multiwavelength analysis in the B213-L1495 clouds
Palau, Aina; de Gregorio-Monsalvo, I.; Morata, Oscar; Stamatellos, D.; Huélamo, N.; Eiroa, Carlos; Bayo, A.; Morales-Calderón, M.; Bouy, H.; Ribas, Á; Asmus, D.; Barrado, D.
2012-08-21 -
A submillimetre search for pre-and proto-brown dwarfs in Chamaeleon II
Barrado, D.; Bouy, H.; Bayo, A.; Palau, Aina; Morales-Calderón, M.; Huélamo, N.; Morata, Oscar; Merín, B.; Eiroa, Carlos; Gregorio-Monsalvo, I. de
2015-12-01 -
Early phases in the stellar and substellar formation and evolution: Infrared and submillimeter data in the Barnard 30 dark cloud
Barrado, D.; De Gregorio Monsalvo, I.; Huélamo, N.; Morales-Calderón, M.; Bayo, A.; Palau, Aina; Ruiz, M. T.; Rivière-Marichalar, P.; Bouy, H.; Morata, Oscar; Stauffer, J. R.; Eiroa, Carlos; Noriega-Crespo, A.
2018-04-01