J/A+A/593/A49 G35.20-0.74N VLA continuum images (Beltran+, 2016)
Binary system and jet precession and expansion in G35.20-0.74N.
Beltran M.T., Cesaroni R., Moscadelli L., Sanchez-Monge A., Hirota T.,
Kumar M.S.N.
<Astron. Astrophys. 593, A49 (2016)>
=2016A&A...593A..49B 2016A&A...593A..49B (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Interferometry ; Protostars
Keywords: ISM: individual objects: G35.20-0.74N -
ISM: HII regions - ISM: jets and outflows - stars: formation
Abstract:
Atacama Large Millimeter/submillimeter Array (ALMA) observations of
the high-mass star-forming region G35.20-0.74N have revealed the
presence of a Keplerian disk in core B rotating about a massive object
of 18M☉, as computed from the velocity field. The luminosity of
such a massive star would be comparable to (or higher than) the
luminosity of the whole star-forming region. To solve this problem it
has been proposed that core B could harbor a binary system. This could
also explain the possible precession of the radio jet associated with
this core, which has been suggested by its S-shaped morphology.
We establish the origin of the free-free emission from core B and
investigate the existence of a binary system at the center of this
massive core and the possible precession of the radio jet.
We carried out VLA continuum observations of G35.20-0.74N at 2cm in
the B configuration and at 1.3cm and 7mm in the A and B
configurations. The bandwidth at 7mm covers the CH3OH maser line at
44.069GHz. Continuum images at 6 and 3.6cm in the A configuration
were obtained from the VLA archive. We also carried out VERA
observations of the H2O maser line at 22.235GHz.
Description:
The files are the VLA data used to produce the maps in Figs. 1, 2, 3,
6, 7, and 8. Units are Jy/beam. Coordinate system is equatorial
(J2000.0).
Objects:
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RA (2000) DE Designation(s)
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18 58 13.04 +01 40 36 G35.20-0.74N = Gal 35.20-0.74
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 117 5 List of fits images
fits/* . 5 Individual fits images
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 50 A21 --- Obs.Date Observation date (YYYY-MM-DDThh:mm:ss.s)
52- 58 F7.4 GHz Freq Observed frequency
60- 64 I5 Kibyte size Size of FITS file
66- 81 A16 --- FileName Name of FITS file, in subdirectory fits
83-117 A35 --- Title Title of the FITS file
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Acknowledgements:
Maria T. Beltran, mbeltran(at)arcetri.astro.it
(End) Patricia Vannier [CDS] 20-Aug-2016