Low Mass Star Formation in the Gum Nebula: I. CG30/31/38

Details Low Mass Star Formation in the Gum Nebula: I. CG30/31/38 Low Mass Star Formation in the Gum Nebula: I. CG30/31/38

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20113605k&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #136.05; Bulletin of the American Astronomical Society, Vol. 34, p.1320

Other

Scientific paper

We present photometric and spectroscopic results for the low mass pre-main sequence (PMS) stars in the cometary globule (CG) 30/31/38 complex. We obtained multi-object high resolution spectra for the targets selected from our multi-wavelength photometry (X-ray, optical, and near IR) using the CTIO-4m/HYDRA in echelle mode. We identified 11 PMS stars brighter than V=16.5 with age < 5 Myr at a distance of approximately 200 pc. The spatial distribution of PMS stars, CG clouds, and ionizing sources (O stars and supernova remnants) suggests a triggered origin of star formation occurred in this star forming region. The Li abundance of PMS stars confirms the youth of these PMS stars supporting our previous photometric results. Most of the these stars show weak Hα emission with Wλ (Hα ) < 10Å. Only 1 out of the 11 PMS stars shows moderate near IR excess, which indicate short survival time of circumstellar disks (t < 5Myr) in this star forming environment. The mass function, including other PMS candidates appear in the same PMS locus, peaks at approximately M2-M3 type stars (M=0.3-0.4Msun). The sharp cut-off of PMS population at V < 18 (M<0.15Msun) may imply that the ionizing sources responsible for the triggering the star formation could also halt low mass star formation by evaporating clouds.

Affiliated with

Also associated with

No associations

Rating

Low Mass Star Formation in the Gum Nebula: I. CG30/31/38 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 Low Mass Star Formation in the Gum Nebula: I. CG30/31/38, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low Mass Star Formation in the Gum Nebula: I. CG30/31/38 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1891440