Proper Motions of H2O Masers in the Water Fountain Source IRAS 19190+1102

Details Proper Motions of H2O Masers in the Water Fountain Source IRAS 19190+1102 Proper Motions of H2O Masers in the Water Fountain Source IRAS 19190+1102

2010-03-09

arxiv.org/abs/1003.1962v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted for publication in ApJ, corrected typos

Scientific paper

We report on the results of two epochs of Very Long Baseline Array (VLBA) observations of the 22 GHz water masers toward IRAS 19190+1102. The water maser emission from this object shows two main arc-shaped formations perpendicular to their NE-SW separation axis. The arcs are separated by ~280 mas in position, and are expanding outwards at an angular rate of 2.35 mas/yr. We detect maser emission at velocities between -53.3 km/s to +78.0 km/s and there is a distinct velocity pattern where the NE masers are blueshifted and the SW masers are redshifted. The outflow has a three-dimensional outflow velocity of 99.8 km/s and a dynamical age of about 59 yr. A group of blueshifted masers not located along the arcs shows a change in velocity of more than 35 km/s between epochs, and may be indicative of the formation of a new lobe. These observations show that IRAS 19190+1102 is a member of the class of "water fountain"' pre-planetary nebulae displaying bipolar structure

Affiliated with

Also associated with

No associations

Rating

Proper Motions of H2O Masers in the Water Fountain Source IRAS 19190+1102 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 Proper Motions of H2O Masers in the Water Fountain Source IRAS 19190+1102, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proper Motions of H2O Masers in the Water Fountain Source IRAS 19190+1102 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-455821