| Issue |
A&A
Volume 372, Number 2, June III 2001
|
|
|---|---|---|
| Page(s) | 644 - 650 | |
| Section | The Sun | |
| DOI | https://doi.org/10.1051/0004-6361:20010496 | |
| Published online | 15 June 2001 | |
Determination of RV towards galactic O stars
1
CAISMI/CNR, Largo E. Fermi 5, 50125 Firenze, Italy
2
Dipartimento di Astronomia e Scienza dello Spazio, Universitá di Firenze, Largo E. Fermi 5, 50125 Firenze, Italy
3
Dipartimento di Astronomia, Universitá di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Corresponding author: P. Patriarchi, pat@arcetri.astro.it
Received:
22
May
2000
Accepted:
2
April
2001
We present new measurements of the interstellar reddening parameter
towards 35 O stars. The results are combined with measurements from
the literature for 60 stars to study the behaviour of RV with heliocentric
distance.
RV is the single basic
parameter which characterizes the interstellar extinction from the
near-infrared to the far-UV spectral region. The absolute extinction AV,
from which RV is derived, is best determined by optical and near-infrared
photometry (Cardelli et al. [CITE]).
We consider important the derivation of RV with the
same technique in the direction of as many as possible galactic O
stars.
Key words: interstellar medium: dust, extinction
© ESO, 2001
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