Query : 2001A&A...367..199S

2001A&A...367..199S - Astronomy and Astrophysics, volume 367, 199-210 (2001/2-3)

A photometric and spectroscopic study of the eclipsing symbiotic binary AX Persei.


Abstract (from CDS):

We analysed photometric and spectroscopic optical observations of the eclipsing symbiotic binary AX Persei. For the first time, we present and discuss its historical, 1887-1999, photographic/B-band and visual light curve (LC). The red giant in AX Per losses mass via the wind at a rate of {dot}(M)=7.4±1.7x10–7M/yr. The terminal velocity of the wind is v=32±6km/s. We estimated an effective radius of the Hii nebula during the post-outburst stage (to JD2450000) to be of Rn=192±25R and its average electron concentration ∼ne=(2.9-3.6)±0.7x109cm–3 for the electron temperature Te=1-1.5x104K. The [OIII] nebula in AX Per is rather dense, having the electron concentration ne([OIII])≃3x107cm–3 for Te=1-1.5x104K. Spectroscopic observations made in the middle of the 1992.8 and 1994.7 eclipses showed that a significant part of flux emitted in the HI, HeII and nebular [OIII] lines originates in the vicinity of the hot component. Transition of AX Per to its nebular phase occurred at/around JD2450000. A small ∼0.6mag brightening at that time and consequently very broad wave-like variation in the LC developed. This event was caused by dilution of a shell around the hot star, during which about of 1.5x1050 particles (∼1.3x10–7M) were injected into the ionized region.

Abstract Copyright:

Journal keyword(s): stars: binaries: symbiotics - stars: circumstellar matter - stars: mass-loss

VizieR on-line data: <Available at CDS (J/A+A/367/199): table2.dat table3.dat>

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
1 V* AX Per Sy* 01 36 22.7004366768 +54 15 02.411547480   11.45 10.67 11.04   M3IIIep+A0 290 1
2 HD 9839 * 01 37 25.0636780536 +55 04 14.920312620   8.44 7.47     K0 17 0
3 V* BF Cyg Sy* 19 23 53.5006095432 +29 40 29.177024952   10.52 9.30     Bep+M5III 274 0

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