C.D.S. - SIMBAD4 rel 1.7 - 2020.11.30CET22:24:53

2013A&A...551L..10S - Astronomy and Astrophysics, volume 551, L10-10 (2013/3-1)

Discovery of collimated ejection from the symbiotic binary BF Cygni.


Abstract (from CDS):

Detection of collimated ejection from white dwarfs (WD) in symbiotic binaries is very rare and has employed a variety of methods in X-ray, radio, optical imagery, and spectroscopy. To date, its signature in the optical spectra has only been recorded for four objects (MWC 560, Hen 3-1341, StHα190, and Z And). We present the first observational evidence of highly-collimated bipolar ejection from the symbiotic binary BF Cyg, which developed during its current (2006-12) active phase, and determine their physical parameters. We monitored the outburst with the optical high-resolution spectroscopy and multicolour UBVRCIC photometry. During 2009, three years after the 2006-eruption of BF Cyg, satellite components to Hα and Hβ lines emerged in the spectrum. During 2012, they became stable and were located symmetrically with respect to the main emission core of the line. Spectral properties of these components suggest bipolar ejection collimated within an opening angle of ≲15°, whose radiation is produced by an optically thin medium with the emission measure of 1-2x1059(d/3.8kpc)2/cm3. Formation of the collimated ejection a few years after the eruption and its evolution on a time scale of years at a constant optical brightness can aid us in better understanding the accretion process during the active phases of symbiotic stars.

Abstract Copyright:

Journal keyword(s): ISM: jets and outflows - binaries: symbiotic - stars: individual: BF Cygni

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 EM* MWC 560 Sy* 07 25 51.2841922233 -07 44 08.078237799   10.01 9.70 10.60   M4ep+Beq 185 0
2 Hen 3-1341 Sy* 17 08 36.5712745890 -17 26 30.407858350           M3.5 57 0
3 V* BF Cyg Sy* 19 23 53.5009795759 +29 40 29.173306238   10.52 9.30     Bep+M5III 267 0
4 EM* StHA 190 Sy* 21 41 44.8880611733 +02 43 54.409367196   11.13 10.22     G5e 41 0
5 V* Z And Sy* 23 33 39.9551345051 +48 49 05.973842875 8.86 9.35 8.00     M2III+B1eq 503 0

    Equat.    Gal    SGal    Ecl

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