2003A&A...400..279S


Query : 2003A&A...400..279S

2003A&A...400..279S - Astronomy and Astrophysics, volume 400, 279-291 (2003/3-2)

Long-term spectroscopic monitoring of the Luminous Blue Variable HD 160529.

STAHL O., GAENG T., STERKEN C., KAUFER A., RIVINIUS T., SZEIFERT T. and WOLF B.

Abstract (from CDS):

We have spectroscopically monitored the galactic Luminous Blue Variable HD 160529 and obtained an extensive high-resolution data set that covers the years 1991 to 2002. During this period, the star evolved from an extended photometric minimum phase towards a new visual maximum. In several observing seasons, we covered up to four months with almost daily spectra. Our spectra typically cover most of the visual spectral range with a high spectral resolution (λ/Δλ≃20000 or more). This allows us to investigate the variability in many lines and on many time scales from days to years. We find a correlation between the photospheric Hei lines and the brightness of the star, both on a time scale of months and on a time scale of years. The short-term variations are smaller and do not follow the long-term trend, strongly suggesting different physical mechanisms. Metal lines also show both short-term and long-term variations in strength and also a long-term trend in radial velocity. Most of the line-profile variations can be attributed to changing strengths of lines. Propagating features in the line profiles are rarely observed. We find that the mass-loss rate of HD 160529 is almost independent of temperature, i.e. visual brightness.

Abstract Copyright:

Journal keyword(s): stars: individual: HD 160529 - stars: early-type - stars: emission-line, Be - stars: variables: general - stars: mass-loss

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10197 1
2 HD 6884 s*b 01 07 18.2182685856 -72 28 03.657105156   10.32 10.2     B9Ia0ek 119 0
3 * bet Ori s*b 05 14 32.27210 -08 12 05.8981 -0.56 0.10 0.13 0.13 0.15 B8Iae 742 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15993 1
5 HD 269662 sg* 05 30 51.4749432240 -69 02 58.590657600 10.23 10.52 10.28 10.40 10.390 A0Ia 98 0
6 HD 92207 sg* 10 37 27.0681291600 -58 44 00.016141092 5.71 5.95 5.45     A0Ia 150 0
7 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 611 0
8 * z02 Car s*b 11 08 33.9978278688 -61 56 49.832516832 4.96 5.42 5.19 4.89 4.72 B9.5Ia 81 0
9 * omi02 Cen sg* 11 31 48.7995475440 -59 30 56.329619148 5.52 5.63 5.14 4.61 4.15 A2Ia 77 0
10 HD 160529 sg* 17 41 59.0261939376 -33 30 13.704456780 8.17 7.87 6.66 5.50 4.51 A2Ia 191 1

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2022.05.24-10:52:07

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