Infrared objects near H2O masers in regions of active star formation. IV - Molecular hydrogen observations

Details Infrared objects near H2O masers in regions of active star formation. IV - Molecular hydrogen observations Infrared objects near H2O masers in regions of active star formation. IV - Molecular hydrogen observations

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...164..104o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 164, no. 1, Aug. 1986, p. 104-115.

Astronomy and Astrophysics

Astronomy

26

Hydrogen Clouds, Infrared Sources (Astronomy), Star Formation, Water Masers, Brightness, Interstellar Extinction, Luminosity, Optical Thickness, Shock Waves, Spatial Distribution

Scientific paper

Q-branch H2-line-emission observations toward 20 IR objects associated with H2O masers, obtained using low-resolution CVF spectrophotometers on the 1-m and 3.6-m ESO telescopes during May 1983 and 1984, are reported. The data are presented in spectra, tables, and surface-brightness maps and characterized in detail. The 2.41-micron line is clearly detected in 0.1-0.3-pc regions around 12 of the sources, and it is shown that less than 1 percent of the mechanical energy required to drive the 2-10-kyr-old shocks of the most evolved objects can be provided by the radiative pressure of the massive stars or OB clusters observed in the IR. It is suggested that the IR objects produced the shocks by release of about 5 x 10 to the 47th ergs of mechanical energy during an unknown active phase a few kyr ago, and that the H2 emission lasts for up to 10 kyr. In this hypothesis, the lack of H2 emission from the least evolved IR objects is attributed to a fast-shock phase of about 1 kyr during which H2 is dissociated.

Affiliated with

Also associated with

No associations

Rating

Infrared objects near H2O masers in regions of active star formation. IV - Molecular hydrogen observations 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 Infrared objects near H2O masers in regions of active star formation. IV - Molecular hydrogen observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared objects near H2O masers in regions of active star formation. IV - Molecular hydrogen observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-891263