Protostars and Planets VI, Heidelberg, July 15-20, 2013
Poster 1K048
Spatially resolved atomic and molecular emission from the very low-mass star YLW52
Garcia Lopez, Rebeca (Max Planck Institut fuer Radioastronomie)
Caratti o Garatti, Alessio (Max Planck Institut fuer Radioastronomie)
Weigelt, Gerd (Max Planck Institut fuer Radioastronomie)
Nisini, Brunella (INAF-Osservatorio Astronomico di Roma)
Antoniucci, Simone (INAF-Osservatorio Astronomico di Roma)
Abstract:
Molecular outflows from very low-mass stars (VLMSs) and brown dwarfs (BDs) have been studied very little, and only a few objects have been directly imaged.
Using VLT SINFONI K-band observations, we spatially resolved, for the first time, the H2 emission around YLW52, a ~0.1-0.2 Msun Class I source.
The molecular emission shows a complex structure delineating a large outflow cavity and an asymmetric molecular jet.
In addition, new [FeII] VLT ISAAC observations at 1.644 um allowed us to discover the atomic jet counterpart which extends down to the central source.
The outflow structure is similar to those found in low-mass Class I young stellar objects (YSOs) and Classical TTauri stars (CTTSs). However, its Lacc/Lbol ratio is very high (~80%), and the derived mass accretion rate is about one order of magnitude higher than in objects with similar mass, pointing to the young nature of this source.
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