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J/A+A/469/207 High-resolution images in Cep-A HW2 region (Comito+, 2007)
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Beginning of ReadMe :J/A+A/469/207 High-resolution images in Cep-A HW2 region (Comito+, 2007)
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High-resolution study of a star-forming cluster in the Cep-A HW2 region.
Comito C., Schilke P., Endesfelder U., Jimenez-Serra I., Martin-Pintado J.
<Astron. Astrophys. 469, 207 (2007)>
=2007A&A...469..207C
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ADC_Keywords: Masers ; Interstellar medium ; Interferometry
Keywords: stars: formation - instrumentation: high angular resolution -
instrumentation: interferometers - ISM: molecules -
ISM: jets and outflows
Abstract:
Due to its relatively small distance (725pc), the Cepheus A East
star-forming region is an ideal laboratory to study massive star
formation processes. Based on its morphology, it has been suggested
that the flattened molecular gas distribution around the YSO HW2 may
be a 350-AU-radius massive protostellar disk. The goal of our work is
to ascertain the nature of this structure. We have employed the
Plateau de Bure Interferometer to acquire (sub-)arcsecond-resolution
imaging of high-density and shock tracers, such as methyl cyanide
(CH3CN) and silicon monoxide (SiO), towards the HW2 position. On the
1" scale, the flattened distribution of molecular gas around HW2
appears to be due to the projected superposition, on the plane of the
sky, of at least three protostellar objects, of which at least one is
powering a molecular outflow at a small angle with respect to the line
of sight. The presence of a protostellar disk around HW2 is not ruled
out.
Description:
The files are the data cubes used to produce the maps in Fig. 1 of the
paper. Units are mJy/beam. Coordinate system is equatorial (J2000.0).
Objects:
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RA (2000) DE Designation(s)
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22 56 17.9 +62 01 49.6 HW2 = NAME CEP A HW2
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