Physical properties of the Sh2-104 HII region as seen by Herschel

Details Physical properties of the Sh2-104 HII region as seen by Herschel Physical properties of the Sh2-104 HII region as seen by Herschel

2010-05-17

arxiv.org/abs/1005.3070v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Accepted by A&A, to be published on the Herschel A&A Special Issue. 5 pages, 5 figures.

Scientific paper

Context: Sh2-104 is a Galactic H ii region with a bubble morphology, detected at optical and radio wavelengths. It is considered the first observational confirmation of the collect-and-collapse model of triggered star-formation. Aims: We aim to analyze the dust and gas properties of the Sh2-104 region to better constrain its effect on local future generations of stars. In addition, we investigate the relationship between the dust emissivity index {\beta} and the dust temperature, T_dust. Methods: Using Herschel PACS and SPIRE images at 100, 160, 250, 350 and 500 {\mu}m we determine T_dust and {\beta} throughout Sh2-104, fitting the spectral energy distributions (SEDs) obtained from aperture photometry. With the SPIRE Fourier transform spectrometer (FTS) we obtained spectra at different positions in the Sh2-104 region. We detect J-ladders of CO and 13CO, with which we derive the gas temperature and column density. We also detect proxies of ionizing flux as the [NII] 3P1-3P0 and [CI] 3P2-3P1 transitions. Results: We find an average value of {\beta} ~ 1.5 throughout Sh2-104, as well as a T dust difference between the photodissociation region (PDR, ~ 25 K) and the interior (~ 40 K) of the bubble. We recover the anti-correlation between {\beta} and dust temperature reported numerous times in the literature. The relative isotopologue abundances of CO appear to be enhanced above the standard ISM values, but the obtained value is very preliminary and is still affected by large uncertainties.

Affiliated with

Also associated with

No associations

Rating

Physical properties of the Sh2-104 HII region as seen by Herschel 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 Physical properties of the Sh2-104 HII region as seen by Herschel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Physical properties of the Sh2-104 HII region as seen by Herschel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-57116