Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.8705h&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #87.05; Bulletin of the American Astronomical Society, Vol. 24, p.1262
Astronomy and Astrophysics
Astronomy
1
Scientific paper
A new objective prism survey of the entire Chamaeleon I dark cloud and two-thirds of the Chamaeleon II cloud taken using a CCD detector with the Schmidt telescope at CTIO has uncovered 26 new Hα emission line objects that were missed by previous Hα plate surveys. The new Hα emission line objects have similar infrared colors and spatial distributions to the known T Tauri stars in these dark clouds, and could represent the very low mass end of the stellar population in these clouds or an older, less active component to the usual classical T Tauri star population. The present survey increases the total number of known young stars in both clouds by about 20%, a substantial increase important for studies of the initial mass function in these clouds. The new Hα survey identified 70%\ of the total known YSO's in Cha I, compared with 35%\ for IRAS and only 25%\ for existing X-ray surveys. Together, the new Hα survey and the known near-infrared objects account for ~ 90%\ of all known YSO's in Cha I, with the remaining sources being X-ray-only objects or classical T Tauri stars that have faded from view. Ten of the new objects are weak-lined stars, with Hα equivalent widths less than 10 Angstroms . Overall, weak-lined T Tauri stars make up a little less than half of the total population of young stars in the Chamaeleon I cloud, similar to the fraction of weak-lined stars known in the Taurus-Auriga cloud. I present coordinates, finding charts, and optical and infrared photometry of the new emission-line objects.
No associations
LandOfFree
New T Tauri Stars in Chamaeleon I and Chamaeleon II 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 New T Tauri Stars in Chamaeleon I and Chamaeleon II, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New T Tauri Stars in Chamaeleon I and Chamaeleon II will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1111691