Issue |
A&A
Volume 692, December 2024
|
|
---|---|---|
Article Number | A54 | |
Number of page(s) | 25 | |
Section | Catalogs and data | |
DOI | https://doi.org/10.1051/0004-6361/202451744 | |
Published online | 02 December 2024 |
H I line observations of 290 evolved stars made with the Nançay Radio Telescope
I. Data
1
GEPI, Observatoire de Paris, Université PSL,
5 place Jules Janssen,
92190
Meudon,
France
2
Observatoire Radioastronomique de Nançay, Observatoire de Paris, Université PSL, Université d’Orléans,
18330
Nançay,
France
3
Massachusetts Institute of Technology Haystack Observatory,
99 Millstone Road,
Westford,
MA
01886,
USA
4
LERMA, Observatoire de Paris, Université PSL,
61 av. de l’Observatoire,
75014
Paris,
France
★ Corresponding author; eric.gerard@obspm.fr
Received:
31
July
2024
Accepted:
15
October
2024
We present a compendium of H I 21-cm line observations of circumstellar envelopes (CSEs) of 290 evolved stars, mostly (~84%) on the asymptotic giant branch (AGB), made with the 100 m-class, single-dish Nançay Radio Telescope. The observational and data reduction procedures were optimised to separate genuine CSE H I emission from surrounding Galactic line features. For most targets (254), the results have not been previously published. Clear detections were made of 34 objects, for 33 of which the total H I flux and the size of the CSE could be determined. Possible detections were made of 21 objects, and upper limits could be determined for 95 undetected targets, while for 140 objects confusion from Galactic H I emission along the line of sight precluded meaningful upper limits. The collective results of this survey can provide guidance on the detectability of circumstellar H I gas for future mapping and imaging studies.
Key words: stars: AGB and post-AGB / circumstellar matter / stars: winds, outflows / radio lines: stars
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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