J/A+A/618/A164 ALMA viewing of OH 231.8+4.2 (Sanchez Contreras+, 2018)
Through the magnifying glass: ALMA acute viewing of the intricate nebular
architecture of OH 231.8+4.2.
Sanchez Contreras C., Alcolea J., Bujarrabal V., Castro-Carrizo A.,
Velilla Prieto L., Santander-Garcia M., Quintana-Lacaci G., Cernicharo J.
<Astron. Astrophys. 618, A164 (2018)>
=2018A&A...618A.164S 2018A&A...618A.164S (SIMBAD/NED BibCode)
ADC_Keywords: Nebulae ; Molecular clouds
Keywords: AGB and post-AGB - stars: mass-loss - stars: winds, outflows -
stars: jets - circumstellar matter - stars: late-type
Abstract:
We present continuum and molecular line emission ALMA observations of
OH 231.8+4.2, a well studied bipolar nebula around an asymptotic giant
branch (AGB) star. The high angular resolution (∼0.2"-0.3") and
sensitivity of our ALMA maps provide the most detailed and accurate
description of the overall nebular structure and kinematics of this
object to date. We have identified a number of outflow components
previously unknown. Species studied in this work include 12CO,
13CO, CS, SO, SO2, OCS, SiO, SiS, H3O+, Na37Cl, and CH3OH.
The molecules Na37Cl and CH3OH are first detections in OH
231.8+4.2, with CH3OH being also a first detection in an AGB star.
Description:
Continuum (2D) and spectral line (3D) images of OH 231.8+4.2 at
millimeter wavelengths observed with the ALMA interferometer. A
selection of line cubes is provided. Observational details are given
in the text (sect. 2) and in the captions of figures 2, 3, 4, 8 and
B.3.
Objects:
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RA (2000) DE Designation(s)
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07 42 16.95 -14 42 50.2 OH 231.8+4.2 = V* QX Pup
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 127 5 List of fits files
fits/* . 5 Individual fits files
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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- 31 I2 --- Nz ? Number of slices
33- 38 I6 Kibyte size Size of FITS file
40- 77 A38 --- FileName Name of FITS file, in subdirectory fits
79-127 A49 --- Title Title of the FITS file
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Acknowledgements:
Carmen Sanchez Contreras,
(End) Patricia Vannier [CDS] 24-Sep-2018