Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..115..253l&link_type=abstract
Astronomy and Astrophysics Supplement, v.115, p.253
Astronomy and Astrophysics
Astrophysics
19
Galaxies: Active, Starburst, Infrared: Galaxies
Scientific paper
We present 1.428 to 2.5μm spectra of a sample of ten infrared luminous galaxies, obtained with the Fourier Transform Spectrograph at the CFH Telescope. This critical wavelength range lies on the boundary between spectral regions dominated by emission from stars or from dust and non-thermal sources. Because of the large spectral range covered, non-stellar contributions can be identified through their effect on the continuum. Stellar energy distributions are characterised by their continua as well as by molecular features, essentially due to CO and H_2_O. Eight of the luminous IRAS galaxy spectra are consistent with essentially stellar but highly obscured emission, and two clearly show an additional non-stellar contribution. The preliminary analysis of the starburst spectra is based on evolutionary population synthesis and on a library of near-IR stellar spectra obtained with the same instrument. Limits on the burst durations and the relative contributions of emission components, and estimates of the extinction are derived. The discussion accounts for the area over which the spectra are integrated and to some extent for the inhomogeneous space distribution of the components. While strong CO absorption identifies powerful bursts aged ~9Myr or more, a near-IR stellar energy distribution dominated by giant stars can hide the blue emission from a very young burst, revealed only by emission lines (NGC253). Model predictions and the detailed analysis of individual starburst spectra will be presented more extensively in a following paper.
Lancon Ariane
Rocca-Volmerange Brigitte
Thuan Trinh Xuan
No associations
LandOfFree
H+K spectroscopy of luminous infrared galaxies. 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 H+K spectroscopy of luminous infrared galaxies., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and H+K spectroscopy of luminous infrared galaxies. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1153473