Other
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phdt........21w&link_type=abstract
Thesis (PH.D.)--THE UNIVERSITY OF ARIZONA, 1995.Source: Dissertation Abstracts International, Volume: 57-03, Section: B, page: 1
Other
Initial Mass Function, Praesepe, Pleiades, Ngc 7160
Scientific paper
We present the results of the investigation of the Initial Mass Function at the end of the Main Sequence in young open clusters. We find that over a large range in age and environment the IMFs are similar to each other, and to recent determinations of the field star IMF. We have obtained V, I, and K band photometry of fields in the three relatively unembedded open clusters. The photometry reaches down to various masses in each cluster: 0.08{cal M}_&sun; for Praesepe, 0.04{cal M}odot for the Pleiades, and 0.15{cal M}_&sun; for NGC 7160. We compare the methods for estimating the masses of young, embedded stars developed by Comeron et al. (1993 - CRBR) and by Strom, Kepner, & Strom (1995) and show them to be in good agreement. Spectra in the 2 mu m region of six low mass objects from CRBR are also in agreement with the mass estimates using these methods. The spectrum of a brown dwarf candidate is used to place an upper limit on its mass of 60% of the minimum required for hydrogen burning. The IMFs from these four clusters plus NGC 2024 are shown to be in agreement with each other. The composite MF can be fitted with a power law between 0.04 and 0.5 {cal M}_&sun; with a slope of -0.75 +/- 0.3. There is no evidence for a cutoff at the bottom of the main sequence (0.08{cal M}odot); brown dwarfs appear to be abundant in open clusters. However, the slope of the MF is well above the value of _sp {~}<-2 required for very low mass stars and brown dwarfs to contribute a significant portion of the mass of open clusters. The composite cluster MF also is in agreement with recent determinations of the field star IMF for stellar masses. The field star data do not extend into the brown dwarf range; however, if we extrapolate in accordance with the cluster MF, we conclude that brown dwarfs probably do not contribute significantly to the dark matter.
No associations
LandOfFree
The Low Mass IMF in Young Open Clusters 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 The Low Mass IMF in Young Open Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Low Mass IMF in Young Open Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-837731