J/A+A/653/A53 DEATHSTAR. II. The S-type (Andriantsaralaza+, 2021)
DEATHSTAR: nearby AGB stars with the Atacama Compact Array.
II. CO envelope sizes and asymmetries: the S-type stars.
Andriantsaralaza M., Ramstedt S., Vlemmings W.H.T., Danilovich T.,
De Beck E., Groenewegen M.A.T., Hoefner S., Kerschbaum F., Khouri T.,
Lindqvist M., Maercker M., Olofsson H., Quintana-Lacaci G., Saberi M.,
Sahai R., Zijlstra A.
<Astron. Astrophys. 653, A53 (2021)>
=2021A&A...653A..53A 2021A&A...653A..53A (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, late-type ; Radio sources ; Abundances
Keywords: stars: AGB and post-AGB - stars: mass-loss - stars: winds, outflows -
circumstellar matter
Abstract:
We present the re-calibrated and re-imaged fits-cubes of the second
set of data from the DEATHSTAR project (DEtermining Accurate mass-loss
rates for THermally pulsing AGB STARs, www.astro.uu.se/deathstar): the
S-type stars. Fifteen S-type southern AGB stars were mapped in Bands 6
and 7 with the Atacama Compact Array (ACA). The generated beams have
sizes of 4-8 and 3-6-arcseconds in Band 6 and 7, respectively. The rms
noise level reached is typically 50-70 and 100-150mJy/beam in Band 6
and 7, respectively. The beam sizes and rms values for each source are
listed in the paper together with the description of the reduction
process, the analysis of the cubes and tentative line detections.
Description:
The sources were observed with the ACA in stand-alone mode in Cycle 5
in Band 6 (project codes: 2018.1.01434.S).The observations covered
four spectral windows in each band. In Band 6 the windows were centred
on 216.2, 218.3, 230.7 and 232.1GHz. In Band 7 they were centred on
330.75, 332.25, 343.52 and 345.6GHz. This setup covers line emission
from 12CO(2-1), (3-2), and 13CO(3-2),as well as emission of other
molecules. The spectral resolution of the imaged data was set to
0.75km/s in the 12CO and 13CO windows and to 1.0 and 1.5km/s in
the other spectral windows in Band 6 and 7, respectively. All data
were calibrated using the standard scripts and imaged using the CASA
package (McMullin et al., 2007, ASP Conf. Ser., 376, 127).
Self-calibration was performed using a small number of channels,
typically two, across the peak of the 12CO line and applied to all
sources in both bands. The cubes and images have improved quality
compared to the data products provided in the ALMA archive. The cubes
cover each spectral window imaged separately resulting in eight fits
cubes per source. For each band a continuum image is generated from
all the line free channels.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 34 15 List of studied S-stars
list.dat 188 150 List of fits files
fits/* . 150 Individual fits files
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See also:
J/A+A/640/A133 : DEATHSTAR. Nearby AGB stars with ALMA ACA (Ramstedt+, 2020)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Simbad name
12- 13 I2 h RAh Simbad right Ascension (J2000.0)
15- 16 I2 min RAm Simbad right Ascension (J2000.0)
18- 22 F5.2 s RAs Simbad right Ascension (J2000.0)
24 A1 --- DE- Simbad Declination sign (J2000.0)
25- 26 I2 deg DEd Simbad declination (J2000.0)
28- 29 I2 arcmin DEm Simbad declination (J2000.0)
31- 34 F4.1 arcsec DEs Simbad declination (J2000.0)
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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- 10 A10 --- Name Star name
12- 20 F9.5 deg RAdeg Right Ascension of center (J2000)
21- 29 F9.5 deg DEdeg Declination of center (J2000)
31- 32 I2 --- Nx Number of pixels along X-axis
34- 35 I2 --- Ny Number of pixels along Y-axis
37- 40 I4 --- Nz ? Number of slices for the datacubes
42- 67 A26 "datime" Obs.date Observation date
69- 75 F7.3 GHz bFREQ ? Lower value of frequency interval
77- 83 F7.3 GHz BFREQ ? Upper value of frequency interval
85- 95 E11.6 Hz dFREQ ? Frequency resolution
97-101 I5 Kibyte size Size of FITS file
103-125 A23 --- FileName Name of FITS file, in subdirectory fits
127-188 A62 --- Title Title of the FITS file
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Acknowledgements:
Miora Andriantsaralaza, miora.andriantsaralaza(at)physics.uu.se
References:
McMullin et al., 2007, Astronomical Data Analysis Software and Systems XVI
ASP Conference Series, Vol. 376, proceedings of the conference held
15-18 October 2006 in Tucson, Arizona, USA. Edited by Richard A. Shaw,
Frank Hill and David J. Bell., p.127
Ramstedt et al., Paper i 2020A&A...640A.133R 2020A&A...640A.133R, Cat. J/A+A/640/A133
(End) Patricia Vannier [CDS] 13-Jul-2021