Characterising discs around Herbig Ae/Be stars through modelling of low-J 12CO lines
نویسندگان
چکیده
منابع مشابه
PAH emission from Herbig AeBe stars
We present spectra of a sample of Herbig Ae and Be (HAeBe) stars obtained with the Infrared Spectrograph on the Spitzer Space Telescope. All but one of the Herbig stars show emission from polycyclic aromatic hydrocarbons (PAHs) and seven of the spectra show PAH emission, but no silicate emission at 10 μm. The central wavelengths of the 6.2, 7.7–8.2, and 11.3 μm emission features decrease with s...
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We present 7 mm and 3.5 cm wavelength continuum observations toward the Herbig AeBe star HD169142 performed with the Very Large Array (VLA) with an angular resolution of ≃ 1. We find that this object exhibits strong (≃ 4.4 mJy), unresolved (. 1) 7 mm continuum emission, being one of the brightest isolated Herbig AeBe stars ever detected with the VLA at this wavelength. No emission is detected a...
متن کاملDo Herbig Ae / Be stars have discs ?
Hα spectropolarimetry on Herbig Ae/Be stars shows that the innermost regions of intermediate mass (2 – 15 M⊙) Pre-Main Sequence stars are flattened. This may be the best evidence to date that the higher mass Herbig Be stars are embedded in circumstellar discs. A second outcome of our study is that the spectropolarimetric signatures for the lower mass Herbig Ae stars differ from those of the hig...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200912584