SIMBAD references

2015ApJS..217....6J - Astrophys. J., Suppl. Ser., 217, 6 (2015/March-0)

''Dust, ice, and gas in time'' (DIGIT) Herschel observations of GSS30-IRS1 in Ophiuchus.

JE H., LEE J.-E., LEE S., GREEN J.D. and EVANS II N.J.

Abstract (from CDS):

As a part of the ''Dust, Ice, and Gas In Time'' (DIGIT) key program on Herschel, we observed GSS30-IRS1, a Class I protostar located in Ophiuchus (d = 120 pc), with Herschel/Photodetector Array Camera and Spectrometer. More than 70 lines were detected within a wavelength range from 50 to 200 µm, including CO, H2O, OH, and two atomic [O i] lines at 63 and 145 µm. The [C ii] line, known as a tracer of externally heated gas by the interstellar radiation field (ISRF), is also detected at 158 µm. All lines, except [O i] and [C ii], are detected only at the central spaxel of 9".4x9".4. The [O i] emissions are extended along a NE-SW orientation, and the [C ii] line is detected over all spaxels, indicative of an external photodissociation region. The total [C ii] intensity around GSS30 reveals that the far-ultraviolet radiation field is in the range of 3 to 20 {G0}, where {G0} is in units of the Habing Field, 1.6x10–3 erg/cm/s. This enhanced external radiation field heats the envelope of GSS30-IRS1, causing the continuum emission to be extended, unlike the molecular emission. The best-fit continuum model of GSS30-IRS1 with the physical structure including flared disk, envelope, and outflow shows that the internal luminosity is 10 L, and the region is externally heated by a radiation field enhanced by a factor of 130 compared to the standard local ISRF.

Abstract Copyright:

Journal keyword(s): radiative transfer - stars: formation - stars: protostars

Simbad objects: 28

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2019.10.21-13:43:49

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