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http://hdl.handle.net/20.500.12386/32803
Title: | A 20-year H2O maser monitoring program with the Medicina 32-m telescope | Authors: | BRAND, JAN Felli, M. CESARONI, Riccardo CODELLA, CLAUDIO COMORETTO, Giovanni Di Franco, S. MASSI, Fabrizio MOSCADELLI, Luca NESTI, Renzo OLMI, LUCA Palagi, F. Palla, F. PANELLA, Dario Valdettaro, R. |
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 https://api.elsevier.com/content/abstract/scopus_id/38849111867 |
ISSN: | 1743-9213 | ISBN: | 978-0521-87464-9 | DOI: | 10.1017/S1743921307013014 | Bibcode ADS: | 2007IAUS..242..223B | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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Brand_2007_IAUS.pdf | PDF editoriale | 808.96 kB | Adobe PDF | View/Open |
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