Infrared absorption of H_2_O toward massive young stars.

Details Infrared absorption of H_2_O toward massive young stars. Infrared absorption of H_2_O toward massive young stars.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.177v&link_type=abstract

Astronomy and Astrophysics, v.315, p.L177-L180

Astronomy and Astrophysics

Astrophysics

74

Ism: Molecules, Ism: Clouds, Ism: Individual: Afgl 2591, Afgl 2136, Afgl 4176, Ngc 7538 Irs9

Scientific paper

We present ISO-SWS observations of absorption lines of gas-phase water within its bending vibrational mode at 6μm toward four massive young stars, which cover a range in physical parameters. Hot water with an excitation temperature >200K is detected toward GL 2136 and GL 4176, in addition to GL 2591 discussed by Helmich et al. (1996A&A...315L.173H). The abundance of water with respect to H_2_ is high in these regions, ~(2-3)x10^-5^, and comparable to the solid H_2_O abundance. In contrast, no gas-phase water absorption lines are seen toward NGC 7538 IRS9. The amount of gas-phase water is correlated with the column density of warm gas along the line of sight. Infrared observations of a larger variety of sources may provide insight into the relative importance of evaporation of grain mantles vs. high temperature gas-phase chemistry in producing the observed high abundance of H_2_O.

Affiliated with

Also associated with

No associations

Rating

Infrared absorption of H_2_O toward massive young stars. 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 absorption of H_2_O toward massive young stars., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared absorption of H_2_O toward massive young stars. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1144670