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|Title:||A 20-year H2O maser monitoring program with the Medicina 32-m telescope||Authors:||BRAND, JAN
Di Franco, S.
|Issue Date:||2007||Journal:||PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION||Volume:||Astrophysical Masers and their Environments||Editors:||Chapman, Jessica M.; Baan, Willem A.||Number:||vol. 3, S242||First Page:||223||Abstract:||The Arcetri/Bologna H<SUB>2</SUB>O maser group has been monitoring the 1.3-cm water maser emission from a sample of 43 star-forming regions (SFRs) and 22 late-type stars for about 20 years at a sampling rate of 4-5 observations each year, using the 32-m Medicina Radio Telescope (HPBW 1.‧9 at 22 GHz). For the late-type stars we observe representative samples of OH/IR-stars, Mira's, semi-regular variables, and supergiants. The SFR-sample spans a large interval in FIR luminosity of the associated Young Stellar Object (YSO), from 20 L<SUB></SUB> to 1.5 × 10<SUP>6</SUP> L<SUB></SUB>, and offers a unique data base for the study of the long-term (years) variability of the maser emission in regions of star formation. <P />This presentation concerns only the masers in SFRs. The information obtained from single-dish monitoring is complementary to what is extracted from higher-resolution (VLA and VLBI) observations, and can better explore the velocity domain and the long-term variability therein. <P />We characterize the variability of the sources in various ways and we study how it depends on the luminosity and other properties of the associated YSO and its environment.||Conference Name:||Astrophysical Masers and their Environments||Conference Place:||Alice Springs, Australia||Conference Date:||March 12-16, 2007||URI:||http://hdl.handle.net/20.500.12386/32803||URL:||https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/20year-h2o-maser-monitoring-program-with-the-medicina-32m-telescope/F91E4906464CBE22DC93772035E1723F
|Appears in Collections:||3.01 Contributi in Atti di convegno|
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