SIMBAD references

2013ApJ...775...63D - Astrophys. J., 775, 63 (2013/September-3)

The Gould's Belt Very Large Array Survey. I. The Ophiuchus complex.

DZIB S.A., LOINARD L., MIODUSZEWSKI A.J., RODRIGUEZ L.F., ORTIZ-LEON G.N., PECH G., RIVERA J.L., TORRES R.M., BODEN A.F., HARTMANN L., EVANS II N.J., BRICENO C. and TOBIN J.

Abstract (from CDS):

We present large-scale (∼2000 arcmin2), deep (∼20 µJy), high-resolution (∼1'') radio observations of the Ophiuchus star-forming complex obtained with the Karl G. Jansky Very Large Array at λ = 4 and 6 cm. In total, 189 sources were detected, 56 of them associated with known young stellar sources, and 4 with known extragalactic objects; the other 129 remain unclassified, but most of them are most probably background quasars. The vast majority of the young stars detected at radio wavelengths have spectral types K or M, although we also detect four objects of A/F/B types and two brown dwarf candidates. At least half of these young stars are non-thermal (gyrosynchrotron) sources, with active coronas characterized by high levels of variability, negative spectral indices, and (in some cases) significant circular polarization. As expected, there is a clear tendency for the fraction of non-thermal sources to increase from the younger (Class 0/I or flat spectrum) to the more evolved (Class III or weak line T Tauri) stars. The young stars detected both in X-rays and at radio wavelengths broadly follow a Güdel-Benz relation, but with a different normalization than the most radioactive types of stars. Finally, we detect a ∼70 mJy compact extragalactic source near the center of the Ophiuchus core, which should be used as gain calibrator for any future radio observations of this region.

Abstract Copyright:

Journal keyword(s): astrometry - magnetic fields - radiation mechanisms: non-thermal - radio continuum: stars - techniques: interferometric

VizieR on-line data: <Available at CDS (J/ApJ/775/63): table1.dat table3.dat table5.dat>

Nomenclature: Tables 1-5: GBS-VLA JHHMMSS.ss+DDMMSS.s N=189.

Simbad objects: 212

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2013ApJ...775...63D and select 'bookmark this link' or equivalent in the popup menu


2019.12.11-04:25:36

© Université de Strasbourg/CNRS

    • Contact