Absorption features in the 5-8 micron spectra of protostars
نویسندگان
چکیده
منابع مشابه
A Study of Absorption Features in the Three Micron Spectra of Molecular Cloud Sources with H2O Ice Bands
New 3.3–3.6 μm spectra were obtained of nine young stellar objects embedded in molecular clouds. An absorption feature at ∼3.47 μm (2880 cm) with FWHM∼0.09 μm (80 cm), first identified by Allamandola et al. (1992), was definitively detected toward seven objects, and marginally in the other two. The feature is better correlated with H2O ice than with the silicate dust optical depth in the data o...
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The high-resolution (R 1⁄4 25; 000) infrared M-band spectrum of the massive protostar NGC 7538 IRS 9 shows a narrow absorption feature at 4.779 lm (2092.3 cm 1) that we attribute to the vibrational stretching mode of the 13CO isotope in pure CO icy grain mantles. This is the first detection of 13CO in icy grain mantles in the interstellar medium. The 13CO band is a factor of 2.3 narrower than t...
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15 صفحه اولHigh Resolution Near-Infrared Spectra of Protostars
We present new high resolution (R ≃ 21, 000) near-infrared (λ = 2μm) spectroscopic observations of a sample of Class I and flat-spectrum protostellar objects in the ρ Ophiuchi dark cloud. None of the five Class I spectra show CO v = 0 – 2 absorption features, consistent with high K-band continuum veilings, 4 . rk . 20 and fast stellar rotation, assuming that the underlying protostellar photosph...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1984
ISSN: 0004-637X,1538-4357
DOI: 10.1086/162728