SIMBAD references

2007A&A...469..985F - Astronomy and Astrophysics, volume 469, 985-992 (2007/7-3)

Searching for coronal radio emission from protostars using very-long-baseline interferometry.

FORBRICH J., MASSI M., ROS E., BRUNTHALER A. and MENTEN K.M.

Abstract (from CDS):

In order to directly study the role of magnetic fields in the immediate vicinity of protostars, we use Very-Long-Baseline Interferometry (VLBI), aiming at the detection of non-thermal centimetric radio emission. This is technically the only possibility to study coronal emission at sub-AU resolution.We performed VLBI observations of the four nearby protostars HL Tau, LDN 1551 IRS5, EC 95, and YLW 15 in order to look for compact non-thermal centimetric radio emission. For maximum sensitivity, we used the High Sensitivity Array (HSA) where possible, involving the Very Long Baseline Array (VLBA), the phased Very Large Array (VLA), as well as the Arecibo, Green Bank, and Effelsberg radio telescopes.While all four protostars were detected in VLA-only data, only one source (YLW15VLA2) was detected in the VLBI data. The possibility of non-detections due to free-free absorption, possibly depending on source geometry, is considered.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - stars: coronae - stars: magnetic fields - radio continuum: stars - stars: individual: YLW 15

Simbad objects: 20

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2019.10.14-09:09:59

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