An unusual abundance of T Tauri stars? NIR study of the southern high-mass star-forming region RCW 34

Details An unusual abundance of T Tauri stars? NIR study of the southern high-mass star-forming region RCW 34 An unusual abundance of T Tauri stars? NIR study of the southern high-mass star-forming region RCW 34

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..266..384d&link_type=abstract

Star clusters: basic galactic building blocks throughout time and space, Proceedings of the International Astronomical Union, IA

Astronomy and Astrophysics

Astronomy

Methods: Data Analysis, Techniques: Image Processing, Techniques: Photometric, Stars: Formation, Stars: Fundamental Parameters, Stars: Luminosity Function, Mass Function, Stars: Pre–Main-Sequence, Infrared: Stars

Scientific paper

RCW 34 is a special star-forming region with a few stars showing an infrared excess, but seems as if it has an uncommon abundance in T Tauri stars. This possibility was confirmed by (i) clustering of classical T Tauri (CTT) stars in the two-color diagram, (ii) clustering of pre-main-sequence stars in the color-magnitude diagram, as well as (iii) the significant clustering at dimensions larger than the image-frame size, indicated by the second ‘bump’ in the two-point correlation analysis. A possible explanation for the above features could be the existence of an underlying wide CTT cluster with a smaller cluster centered around the massive star. The Ks-band luminosity function (α = 0.31) of RCW 34 shows that it is indeed a region of low stellar masses with an age of about of 1 Myr. Spectroscopic confirmation of such an underlying T Tauri cluster is necessary before any definite conclusions can be reached.

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