EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 128/1 Article
Free access article

Issue Astron. Astrophys. Suppl. Ser.
Volume 128, Number 1, February_II 1998
Page(s) 1 - 6
DOI http://dx.doi.org/10.1051/aas:1998124

DOI: 10.1051/aas:1998124

A&A Supplement series, Vol. 128, February II 1998, 1-6

Received September 23, 1996; accepted May 30, 1997

Variation of spectral features in the ON2 water maser

A. Márqueztex2html_wrap509, J.E. Mendoza-Torrestex2html_wrap509, and E.E. Lekht tex2html_wrap513

Send offprint request: E.E. Lekht

tex2html_wrap515  Instituto Nacional de Astrofısica, Óptica y Electrónica, Apartado Postal 51 y 216, Puebla, Pue., Z.P. 72000, México
tex2html_wrap517  Sternberg Astronomical Institute, Universitetsky prospect 13, 119899, Moscow, Russia

Abstract:

Results are presented of the analysis of tex2html_wrap_inline489 maser spectra in ON2, obtained with the RT-22 radio telescope at Pushchino during 1981-1996. The spectral features are analyzed and their time evolution examined. Anticorrelation between the fluxes of features with close radial velocities is found. A systematic displacement of the drifts sum of all features from 0.8 to tex2html_wrap_inline491 during 1981-1988 and 1990-1996 is observed. In 1989 a fast jump of this parameter from -0.3 to tex2html_wrap_inline495 took place. The quadratic sum of the drifts of the features always increased during a rise in maser activity. Possible causes of the observed phenomena are discussed.

keywords: ISM: ON2 -- masers -- radio lines: ISM

SIMBAD Objects

Copyright by the European Southern Observatory (ESO)



What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.