R Crt and RT Vir Medicina spectra : J/A+A/644/A45

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Authors : Brand J. orcid , Engels D., Winnberg A. (hide) , Engels D., Winnberg A. et..al

VizieR DOI : 10.26093/cds/vizier.36440045
Bibcode : 2020A&A...644A..45B (ADS) (Simbad) (Objects)
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CDS Keywords : Masers; Stars, variable; Stars, giant; Spectra, radio
UAT : Astrophysical masers, Radio astronomy, Variable stars, Giant stars, Radio spectroscopy

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Inserted into VizieR : 27-Nov-2020
Last modification : 27-Apr-2021

Water vapour masers in long-period variable stars. II. The semi-regular variables R Crt and RT Vir. (2020)

Keywords : stars AGB and post-AGB - masers

Abstract:Water masers emitting at a radiofrequency of 22GHz are often found in the circumstellar envelopes of evolved stars. We monitored the H_2_O maser emission of a larger sample of evolved stars of different types to study the maser properties as a function of stellar type. We wish to understand the origin and evolution of the H_2_O masers in circumstellar envelopes. In this paper, we take a closer look at R Crt and RT Vir, two nearby (<250pc) semi-regular variable stars. The findings complement our monitoring results for RX Boo and SV Peg, two other semi-regular variable stars that we have discussed in a previous paper. ...(more)
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Astronomy and Astrophysics policies
The FITS files are the spectra of the 22GHz water maser emission of R Crt and RT Vir as shown in Figs. 13 and 14 in the paper. Flux density versus Vlos (or frequency). The observations were made with the 32-m Medicina antenna and the 100-m telescope at Effelsberg. The spectra were originally in CLASS-format and were transformed to FITS via the command 'fits write name.fits /mode spectrum' in CLASS. CLASS is part of the Grenoble GILDAS software package. The file names consist of the name of the star, followed by a running number, and finally by the TJD (truncated Julian Date, TJD=JD-2440000.5).
Jan Brand, brand(at)ira.inaf.it

                


                

                    

                


                

                    

                


                

                    
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