| Issue |
A&A
Volume 373, Number 2, July II 2001
|
|
|---|---|---|
| Page(s) | 572 - 575 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20010623 | |
| Published online | 15 July 2001 | |
UV (IUE) spectra of the central stars of high latitude planetary nebulae Hb7 and Sp3*
1
Indian Institute of Astrophysics, Koramangla, Bangalore 560034, India
2
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
3
Institute of Astronomy, School of Science, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
4
Kiso Observatory, School of Science, University of Tokyo, Mitaka, Kiso, Nagano 397-0101, Japan
Corresponding author: G. Gauba, gauba@iiap.ernet.in
Received:
15
November
2000
Accepted:
23
April
2001
We present an analysis of the UV (IUE) spectra of the central stars of
Hb7 and Sp3. Comparison with the IUE spectrum of the standard star
HD 93205 leads to a spectral classification of O3V for these stars,
with an effective temperature of 50 000 K. From the P-Cygni profiles
of CIV (1550 Å), we derive stellar wind velocities and mass loss rates of
-1317 km s
km s-1 and 
yr-1
and -1603 km s
km s-1 and 
yr-1
for Hb7 and Sp3 respectively. From all the available data, we reconstruct
the spectral energy distribution of Hb7 and Sp3.
Key words: planetary Nebulae: individual: Hb7, Sp3 / stars: AGB and Post-AGB / stars: evolution / stars: mass-loss / stars: winds / ultraviolet: stars
© ESO, 2001
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