Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224..535g&link_type=abstract
Astrophysical Journal, Part 1, vol. 224, Sept. 1, 1978, p. 535-545.
Astronomy and Astrophysics
Astrophysics
61
A Stars, B Stars, Early Stars, Emission Spectra, Stellar Spectrophotometry, Balmer Series, Colorimetry, Interstellar Extinction, Mass Flow Rate, Spectral Energy Distribution, Stellar Models
Scientific paper
Spectrophotometry from 3400 to 8300 A is presented for 18 of the pre-main-sequence Herbig Ae/Be stars. Two observational features are readily noted in many of these stars: a Balmer discontinuity smaller than that exhibited by main-sequence stars of similar spectral type, and very heavy reddening. The observations are de-reddened through the use of model atmospheres appropriate to the spectral type, and an excess flux in the near-infrared is apparent also. A simple optically thin model is developed which ascribes the small Balmer jump to free-bound emission in the Balmer continuum arising in a circumstellar region; the same model parameters also reproduce the near-infrared excess when free-free and Paschen free-bound emission are invoked. The model produces a volume emission measure for the circumstellar region. Estimates of mass-flow rates are made, and some implications of the model for the infrared excess past 1 micron are discussed.
No associations
LandOfFree
Observational studies of the Herbig Ae/Be stars. III - Spectrophotometry 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 Observational studies of the Herbig Ae/Be stars. III - Spectrophotometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observational studies of the Herbig Ae/Be stars. III - Spectrophotometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-938794