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Observations of H2O and OH masers in star-forming regions

Published online by Cambridge University Press:  13 January 2020

Georgij Rudnitskij Open the ORCID record for Georgij Rudnitskij [Opens in a new window] ,
Nuriya Ashimbaeva ,
Olga Bayandina ,
Pierre Colom ,
Evgeny Lekht ,
Mikhail Pashchenko ,
Nadezhda Shakhvorostova ,
Alexander Tolmachev  and
Irina Valtts
Georgij Rudnitskij
Affiliation:
Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow, 119234Russia email: [email protected]
Nuriya Ashimbaeva
Affiliation:
Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow, 119234Russia email: [email protected]
Olga Bayandina
Affiliation:
Astrospace Center, Lebedev Institute of Physics, Russian Academy of Sciences, Moscow, 117997Russia
Pierre Colom
Affiliation:
LESIA, Observatoire de Paris-Meudon, Meudon, 92195France
Evgeny Lekht
Affiliation:
Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow, 119234Russia email: [email protected]
Mikhail Pashchenko
Affiliation:
Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow, 119234Russia email: [email protected]
Nadezhda Shakhvorostova
Affiliation:
Astrospace Center, Lebedev Institute of Physics, Russian Academy of Sciences, Moscow, 117997Russia
Alexander Tolmachev
Affiliation:
Pushchino Radio Astronomy Observatory, Astrospace Center, Lebedev Institute of Physics, Russian Academy of Sciences, Pushchino, 142290Russia
Irina Valtts
Affiliation:
Astrospace Center, Lebedev Institute of Physics, Russian Academy of Sciences, Moscow, 117997Russia
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Abstract

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We report long-term observations of H2O and OH maser emission sources at wavelengths of 1.35 and 18 cm associated with star-forming regions. Strong quasi-periodic flares of maser emission have been observed. Several sources (in particular, G25.65+1.05, IRAS 16293−2422, Cep A) have displayed strong flares in the H2O line, when their peak flux density raised by a few orders of magnitude above the quiet state. Possible causes of this are discussed.

Keywords

stars: formationstars: planetary systems: protoplanetary disksradio lines: stars.
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S345: Origins: From the Protosun to the First Steps of Life , August 2018 , pp. 330 - 332
Copyright
© International Astronomical Union 2020 

References

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