EDP Sciences
Free access
Volume 383, Number 1, February III 2002
Page(s) 244 - 266
Section Diffuse matter in space
DOI http://dx.doi.org/10.1051/0004-6361:20011631

A&A 383, 244-266 (2002)
DOI: 10.1051/0004-6361:20011631

Long-term study of water maser emission associated with young stellar objects

I. The database
R. Valdettaro1, F. Palla1, J. Brand2, R. Cesaroni1, G. Comoretto1, M. Felli1 and F. Palagi3

1  Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
2  Istituto di Radioastronomia CNR, Via Gobetti 101, 40129 Bologna, Italy
3  C.A.I.S.M.I.-CNR, Largo E. Fermi 5, 50125 Firenze, Italy

(Received 28 May 2001 / Accepted 15 November 2001 )

We present the results of more than 10 years of monitoring of the water vapor maser emission in 14 star forming regions obtained with the Medicina 32-m radiotelescope. The sample of objects covers a large range of luminosities of the associated FIR sources. In order to present in a compact and representative way the large amount of data available, we give for each source: a time-velocity-flux density plot, the time dependent integrated flux, the lower and upper envelopes of the maser emission, the frequency of the maser occurrence as a function of velocity, and the mean velocity averaged over the observing period. A brief morphological description of the environment of the maser source is also given. The present data form the basis for a discussion of the main properties of the water vapor maser emission to be presented in a forthcoming paper.

Key words: masers -- radio lines: interstellar -- ISM: molecules

Offprint request: R. Valdettaro, rv@arcetri.astro.it

SIMBAD Objects

© ESO 2002

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.