Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-08-06
Astron.J.134:1870-1876,2007
Astronomy and Astrophysics
Astrophysics
17 pages, 4 figures, to be published in AJ
Scientific paper
10.1086/521926
S140 IRS1 is a remarkable source where the radio source at the center of the main bipolar molecular outflow in the region is elongated perpendicular to the axis of the outflow, an orientation opposite to that expected if the radio source is a thermal jet exciting the outflow. We present results of 1.3 cm continuum and H2O maser emission observations made with the VLA in its A configuration toward this region. In addition, we also present results of continuum observations at 7 mm and re-analyse observations at 2, 3.5 and 6 cm (previously published). IRS 1A is detected at all wavelengths, showing an elongated structure. Three water maser spots are detected along the major axis of the radio source IRS 1A. We have also detected a new continuum source at 3.5 cm (IRS 1C) located ~0.6'' northeast of IRS 1A. The presence of these two YSOs (IRS 1A and 1C) could explain the existence of the two bipolar molecular outflows observed in the region. In addition, we have also detected three continuum clumps (IRS 1B, 1D and 1E) located along the major axis of IRS 1A. We discuss two possible models to explain the nature of IRS 1A: a thermal jet and an equatorial wind.
Curiel Salvador
Rodriguez Luis F.
Torrelles Jose Maria
Trinidad Miguel A.
No associations
LandOfFree
Multiple Sources toward the High-mass Young Star S140 IRS1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Multiple Sources toward the High-mass Young Star S140 IRS1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple Sources toward the High-mass Young Star S140 IRS1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-404324