Observations of M dwarfs beyond 2.2 microns

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

91

Dwarf Stars, Infrared Spectra, M Stars, Stellar Spectra, Stellar Spectrophotometry, Absorption Spectra, Brown Dwarf Stars, Spectral Energy Distribution, Stellar Evolution, Stellar Luminosity, Stellar Temperature, Water

Scientific paper

This paper presents the first systematic spectroscopic observations of M dwarfs beyond 2.2 microns. The coolest dwarfs show strong water absorption in the 3-micron window, and beyond 4 microns, the energy distributions of all the stars fall slightly less steeply than the Rayleigh-Jeans tail of a blackbody. Spectra between 1 and 4 microns are essential in deriving accurate luminosities of M dwarfs, and possibly in deriving accurate effective temperatures. New values reported here are not in general well explained by theoretical models of hydrogen burning stars. This is especially true for those cooler than 3000 K: in the HR diagram they lie closer to brown dwarfs, in contrast to recent results based only on photometry. This result revives the old issues of the nature of the coolest stars and of the accuracy of the theoretical models.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Observations of M dwarfs beyond 2.2 microns 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 Observations of M dwarfs beyond 2.2 microns, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of M dwarfs beyond 2.2 microns will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-791573

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.