EDP Sciences
Free access
Volume 397, Number 3, January III 2003
Page(s) 997 - 1010
Section Stellar atmospheres
DOI http://dx.doi.org/10.1051/0004-6361:20021589

A&A 397, 997-1010 (2003)
DOI: 10.1051/0004-6361:20021589

Hipparcos red stars in the $HpV_{\rm T2}$ and $V\!I_{\rm C}$ systems

I. Platais1, 2, D. Pourbaix1, A. Jorissen1, V. V. Makarov2, 3, L. N. Berdnikov4, N .N. Samus5, 4, T. Lloyd Evans6, T. Lebzelter7 and J. Sperauskas8

1  Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, CP 226, Boulevard du Triomphe, 1050 Bruxelles, Belgium
2  Universities Space Research Association, Division of Astronomy and Space Physics, 300 D Street SW, Washington, D.C. 20024, USA
3  U.S. Naval Observatory, 3450 Massachusetts Ave., NW, Washington D.C. 20392-5420, USA
4  Sternberg Astronomical Institute and Isaac Newton Institute of Chile, Moscow Branch, 13 Universitetskij Prosp., Moscow 119992, Russia
5  Institute of Astronomy, Russian Academy of Sciences, 48 Pyatnitskaya Str., Moscow 119017, Russia
6  School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife, Scotland KY16 9SS
7  Institut für Astronomie, Universität Wien, Türkenschanzstr. 17, 1180 Vienna, Austria
8  Vilnius University Observatory, Ciurlionio 29, Vilnius 2009, Lithuania

(Received 20 September 2002 / Accepted 28 October 2002 )

For Hipparcos M, S, and C spectral type stars, we provide calibrated instantaneous (epoch) Cousins $V\!-\!I$ color indices using newly derived $HpV_{\rm T2}$ photometry. Three new sets of ground-based Cousins $V\!I$ data have been obtained for more than 170 carbon and red M giants. These datasets in combination with the published sources of $V\!I$ photometry served to obtain the calibration curves linking Hipparcos/Tycho $Hp-V_{\rm T2}$ with the Cousins $V\!-\!I$ index. In total, 321 carbon stars and 4464 M- and S-type stars have new $V\!-\!I$ indices. The standard error of the mean $V\!-\!I$ is about 0.1 mag or better down to $Hp\approx9$ although it deteriorates rapidly at fainter magnitudes. These $V\!-\!I$ indices can be used to verify the published Hipparcos $V\!-\!I$ color indices. Thus, we have identified a handful of new cases where, instead of the real target, a random field star has been observed. A considerable fraction of the DMSA/C and DMSA/V solutions for red stars appear not to be warranted. Most likely such spurious solutions may originate from usage of a heavily biased color in the astrometric processing.

Key words: stars: late type -- stars: carbon -- techniques: photometric -- techniques: radial velocities

Offprint request: D. Pourbaix, pourbaix@astro.ulb.ac.be

SIMBAD Objects
Tables at the CDS

© ESO 2003

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.