2007A&A...461L...5B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST00:58:57

2007A&A...461L...5B - Astronomy and Astrophysics, volume 461, L5-8 (2007/1-1)

Evidence for bipolar jets from the optical spectra of the prototypical symbiotic star Z Andromedae.

BURMEISTER M. and LEEDJAERV L.

Abstract (from CDS):

We have studied optical spectra of the symbiotic star Z And, obtained during its latest outburst started in April 2006, with the aim of finding changes in the spectrum yielding clues to the nature of the hot component and its outbursts. The spectroscopic observations of Z And have been made using the 1.5-m telescope at the Tartu Observatory, Estonia, and processed in a standard way. We have found high velocity satellites to the hydrogen Balmer emission lines. Starting from July 30, 2006, weak additional emission components at velocities of about ±1150km/s were detected. Their appearance near the outburst maximum and similarity to the emission features in another symbiotic star Hen 3-1341 imply fast collimated outflows from the hot component of Z And. This finding is consistent with the earlier results by several authors that symbiotic stars can emit bipolar jets at certain stages of their outbursts. A significant decrease in the temperature of the hot component in initial stages of the outburst was detected by the disappearance of the high excitation emission lines from the spectrum.

Abstract Copyright:

Journal keyword(s): ISM: jets and outflows - binaries: symbiotic - stars: individual: Z And - binaries: close

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 V* AG Dra Sy* 16 01 41.0125687664 +66 48 10.131181273 11.50 11.06 9.74 8.52   K3IIIep 474 0
2 Hen 3-1341 Sy* 17 08 36.5712745890 -17 26 30.407858350           M3.5 56 0
3 EM* StHA 190 Sy* 21 41 44.8880611733 +02 43 54.409367196   11.13 10.22     G5e 41 0
4 V* Z And Sy* 23 33 39.9551345052 +48 49 05.973842875 8.86 9.35 8.00     M2III+B1eq 499 0

    Equat.    Gal    SGal    Ecl

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2019.10.23-00:58:57

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