Physics – Optics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.3003c&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #30.03; Bulletin of the American Astronomical Society, V
Physics
Optics
2
Scientific paper
We present the analysis of high-resolution near-infrared adaptive optics images of a sample of 42 Herbig Ae/Be (HAEBE) stars. HAEBE stars are pre-main sequence stars with spectral type B through F, which show emission lines and NIR excess associated to a circumstellar disk.
HAEBE stars are intermediate-mass stars with masses between 2 and 8 solar masses, in between low-mass and high-mass stars, and as such a deeper
understanding of the formation of HAEBE stars, will be important for modeling the formation of stars as function of mass.
Moreover, information on the multiplicity of pre-main sequence stars poses additional constraints on star formation models, as presumably the primary and its companions form at the same time.
Here we present results of a search for close companions to known HAEBE stars
using NIRI/Altair at Gemini North. Companions can be detected as close as 0.1 arcsec and up to 5 magnitudes fainter in the best conditions. We have analyzed 42 stars, of which 17 binaries were found with typical detection limits rho > 0.087 for small dK and dK < 9.7 for larger rho. Objects as faint as dK = 5 could be detected at rho > 0.3.
Cordero Maria J.
Doppmann Greg
Rodgers Brad
Sweet Anne
Thomas Steven
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