The Initial Mass Function of Low-mass Stars and Brown Dwarfs in the W3 Complex
arXiv:2101.11497 · doi:10.3847/1538-3881/abe044
Abstract
We have used archival infrared images obtained with the Wide Field Camera 3 on board the Hubble Space Telescope to constrain the initial mass function of low-mass stars and brown dwarfs in the W3 star-forming region. The images cover 438 arcmin, which encompasses the entire complex, and were taken in the filters F110W, F139M, and F160W. We have estimated extinctions for individual sources in these data from their colors and have dereddened their photometry accordingly. By comparing an area of the images that contains the richest concentration of previously identified W3 members to an area that has few members and is dominated by background stars, we have estimated the luminosity function for members of W3 with masses of 0.03-0.4 . That luminosity function closely resembles data in typical nearby star-forming regions that have much smaller stellar populations than W3 (500 vs. several thousand objects). Thus, we do not find evidence of significant variations in the initial mass function of low-mass stars and brown dwarfs with star forming conditions, which is consistent with recent studies of other distant massive star-forming regions.
9 pages, 6 figures, accepted to Astronomical Journal
References in corpus (8)
- New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
- A Survey for New Members of the Taurus Star-Forming Region with the Sloan Digital Sky Survey
- A Survey for New Members of Taurus from Stellar to Planetary Masses
- Near-IR Spectra of Red Supergiants and Giants. I- Models with Solar and with Mixing-Induced Surface Abundance Ratios
- The Diverse Stellar Populations of the W3 Star Forming Complex
- The low-mass content of the massive young star cluster RCW 38
- Gaia-DR2 distance to the W3 Complex in the Perseus Arm
- New Candidates for Planetary-mass Brown Dwarfs in IC 348