Formation of a disk structure in the symbiotic binary AX Per during its 2007-10 precursor-type activity ⋆

  title={Formation of a disk structure in the symbiotic binary AX Per during its 2007-10 precursor-type activity ⋆},
  author={Augustin Skopal and T. N. Tarasova and Zuzana Carikov'a and F. Castellani and G. Cherini and Sergio Dallaporta and A. Frigo and C. Marangoni and S. Moretti and U. Munari and G. L. Righetti and Alessandro Siviero and Salvatore Tomaselli and A. Vagnozzi and Paolo Valisa},
  journal={Astronomy and Astrophysics},
Context. AX Per is an eclipsing symbiotic binary. During active phases, deep narrow minima are observed in its light curve, and the ionization structure in the binary changes significantly. F rom∼2007.5, AX Per entered a new active phase. Aims. We aim to derive the ionization structure in the binary and its changes during the recent active phase. Methods. We used optical high- and low-resolution spectroscopy and U BVRCIC photometry. We modeled the SED in the optical and broad wings of the H… 
Ionization structure of hot components in symbiotic binaries during active phases
Context. During active phases of symbiotic binaries, an optically thick medium in the form of a flared disk develops around their hot stars. During quiescent phases, this structure is not evident.
Repeated transient jets from a warped disk in the symbiotic prototype Z And: A link to the long-lasting active phase
Active phases of some symbiotic binaries survive for a long time from years to decades. The accretion process onto a white dwarf (WD) sustaining long-lasting activity, and sometimes leading to
The Peculiar Light Curve of the Symbiotic Star AX Per of the Last 125 Years
We analyze the optical light curve (LC) of the last 125?years of the symbiotic star AX?Per through some remarkable correlations that we discovered in its power spectrum (PS). The data were assembled
Early evolution of the extraordinary Nova Del 2013 (V339 Del)
We determine the temporal evolution of the luminosity L(WD), radius R(WD) and effective temperature Teff of the white dwarf (WD) pseudophotosphere of V339 Del from its discovery to around day 40.
The path to Z And-type outbursts: The case of V426 Sagittae (HBHA 1704-05)
The star V426 Sge (HBHA~1704-05), originally classified as an emission-line object and a semi-regular variable, brightened at the beginning of August 2018, showing signatures of a symbiotic star
New outburst of the symbiotic nova AG Peg after 165 years
AG Peg is known as the slowest symbiotic nova, which experienced its nova-like outburst around 1850. After 165 years, during June of 2015, it erupted again showing characteristics of the Z And-type
The Symbiotic Stars
Any white dwarf or neutron star that accretes enough material from a red giant companion, such that this interaction can be detected at some wavelength, is currently termed Symbiotic Star (typical
Photometry of Symbiotic Stars - XIV
We present new multicolour UBVRcIc photometric observations of symbiotic stars, EG And, Z And, BF Cyg, CH Cyg, CI Cyg, V1016 Cyg, V1329 Cyg, AG Dra, RS Oph, AG Peg, AX Per, and the newly discovered
Recent photometry of symbiotic stars: Recent photometry of symbiotic stars
We present new multicolour (UBVRcIc) photometric observations of classical symbiotic stars, EG And, Z And, BF Cyg, CH Cyg, CI Cyg, V1329 Cyg, TX CVn, AG Dra, Draco C1, AG Peg and AX Per, carried out
Detection of X-rays from the jet-driving symbiotic star Hen 3-1341
Fil: Stute, M. Eberhard Karls Universitat Tubingen. Institute for Astronomy and Astrophysics; Alemania;


On the nature of the symbiotic binary AX Persei
Photometric and spectroscopic observations of the symbiotic binary AX Persei are presented. This system contains a red giant that fills its tidal lobe and transfers material into an accretion disk
High-dispersion spectroscopy of the symbiotic star AX Per: A binary model with rapid mass accretion
Results of high-dispersion spectroscopy (∼10 Å mm−1) of the symbiotic star AX Per carried out in the years from 1979 to 1987 are reported. The emission line [FeVII] 6086 consists of a narrow and a
Structure of the hot object in the symbiotic prototype Z Andromedae during its 2000-03 active phase
Aims. To investigate structure of the hot object in the symbiotic prototype Z And during its major 2000-03 active phase. Methods. Analysis of the far ultraviolet, optical low- and high-resolution
Notices to investigation of symbiotic binaries V. Physical parameters derived from UBV magnitudes
Abstract In the optical, the spectrum of symbiotic binaries consists of contributions from the cool giant, symbiotic nebula and the hot star. Strong emission lines are superposed on the continuum. In
Disentangling the composite continuum of symbiotic binaries - I. S-type systems
We describe a method of disentangling the composite, 0.12-5 µm continuum of symbiotic binaries. The ob- served SED is determined by the IUE/HST archival spectra and flux-points corresponding to the
The ongoing 2008–09 outburst of CI Cyg
In this paper, we discuss the early phases of the ongoing outburst that CI Cyg, a prototype symbiotic star, is currently undergoing after 30-year quiescence. We have tightly monitored CI Cyg in B V R
Broad Hα wings from the optically thin stellar wind of the hot components in symbiotic binaries
Aims. To model broad H wings observed in symbiotic binaries by an optically thin, bipolar stellar wind from their hot components as an alternative to that considering the Raman scattering of Ly
A photometric and spectroscopic study of the eclipsing symbiotic binary AX Persei
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
Spectroscopic Diagnosis on Symbiotic Star Z and During Recent Outburst Phase
This report aims to present preliminary results of spectroscopic diagnosis on symbiotic star Z And during recent outburst phenomenon. We have made high dispersion spectroscopy with HIDES (HIgh
Modeling the wind structure of AG Peg by fitting of C IV and N V resonance doublets
The latest outburst of AG Peg has lasted for 150 years, which makes it the slowest nova eruption ever recorded. During the time of IUE observations (1978−1995) line profiles and intensity ratios of