63 citations · 298 across the 18 of their papers we have counts for
17 papers · 1 filter
An Empirical Effective-Temperature Calibrations for Galactic B/A Supergiants
N. L. Vaidman, A. S. Miroshnichenko, Sh. T. Nurmakhametova +9
We present empirical effective temperature Teff calibrations for Galactic supergiants of spectral types B5-A5 based on optical spectra. The relationships were derived from a refere…
Dynamical Masses and Radiative Transfer Modeling of HD 698: a Be Binary in Evolutionary Transition
Ilfa A. Gabitova, Alex C. Carciofi, Tajan H. de Amorim +13
We present a detailed analysis of the early post-mass-transfer binary HD 698 (V742 Cas) combining high-resolution optical spectroscopy, long-baseline interferometry, and radiative-…
The B[e] Phenomenon in Supergiants. A Result of Mass Transfer in Binaries, Mergers, or What?
Anatoly S. Miroshnichenko, Sergey V. Zharikov, Nadezhda L. Vaidman +1
The B[e] phenomenon discovered nearly 50 years ago features the presence of forbidden emission lines due to extended and dense circumstellar gas and large IR excesses due to the ra…
Intriguing X-ray and optical variations of the gamma Cas analog HD45314
G. Rauw, Y. Nazé, M. A. Smith +11
A growing number of Be and Oe stars, named the gamma Cas stars, are known for their unusually hard and intense X-ray emission. This emission could either trace accretion by a compa…
IGR J19552+0044: A new asynchronous short period polar: "Filling the gap between intermediate and ordinary polars"
G. Tovmassian, D. Gonzalez-Buitrago, J. Thorstensen +23
Based on XMM--Newton X-ray observations IGR J19552+0044 appears to be either a pre-polar or an asynchronous polar. We conducted follow-up optical observations to identify the sourc…
Towards Understanding The B[e] Phenomenon: VI. Nature and Spectral Variations of HD 85567
S. A. Khokhlov, A. S. Miroshnichenko, R. Mennickent +7
We report the results of high-resolution () spectroscopic observations of the emission-line object HD 85567, which has been classified as a FS CMa type object or a p…
Long orbital period pre-polars containing an early K-type donor stars. Bottleneck accretion mechanism in action
G. Tovmassian, D. Gonzalez-Buitrago, S. Zharikov +6
We studied two objects identified as a Cataclysmic Variables (CVs) with periods exceeding the natural boundary for Roche lobe filling ZAMS secondary stars. We present observational…
Time-dependent spectral-feature variations of stars displaying the B[e] phenomenon III. HD 50138
T. Jeřábková, D. Korčáková, A. Miroshnichenko +8
We analyse spectroscopic observations of the B[e] star HD 50138 (MWC 158, V743 Mon, or IRAS 06491-0654), a member of the FS CMa group, obtained over the last twenty years. Four dif…
Interpreting the spectral behavior of MWC 314
A. Frasca, A. S. Miroshnichenko, C. Rossi +4
MWC 314 is one of the most luminous stars in the Milky Way. Its fundamental parameters are similar to those of LBVs, although no large photometric variations have been recorded. We…
Confirmation of the Luminous Blue Variable status of MWC 930
A. S. Miroshnichenko, N. Manset, S. V. Zharikov +14
We present spectroscopic and photometric observations of the emission-line star MWC 930 (V446 Sct) during its long-term optical brightening in 2006--2013. Based on our earlier data…
TYC 3159-6-1: a runaway blue supergiant
V. V. Gvaramadze, A. S. Miroshnichenko, N. Castro +2
We report the results of optical spectroscopy of a candidate evolved massive star in the Cygnus X region, TYC 3159-6-1, revealed via detection of its curious circumstellar nebula i…
Doppler tomography of the circumstellar disk of π Aquarii
S. V. Zharikov, A. S. Miroshnichenko, E. Pollmann +17
The work is aimed at a study of the circumstellar disk of the bright classical binary Be star π Aqr. We analysed variations of a double-peaked profile of the Hα emission line in th…
BG Gem - a Poorly-Studied Binary with a Possible Black Hole Component
N. A. Drake, A. S. Miroshnichenko, S. Danford +1
BG Gem is an eclipsing binary with a 91.6-day orbital period. The more massive primary component does not seem to show absorption lines in the spectrum, while the less massive seco…
AMBER/VLTI observations of the B[e] star MWC 300
Y. Wang, G. Weigelt, A. Kreplin +8
Aims. We study the enigmatic B[e] star MWC 300 to investigate its disk and binary with milli-arcsecond-scale angular resolution. Methods. We observed MWC 300 with the VLTI/AMBER in…
Properties and nature of Be stars: 29. Orbital and long-term spectral variations of γ Cassiopeiæ
J. Nemravová, P. Harmanec, P. Koubský +6
A detailed analysis of more than 800 electronic high-resolution spectra of gamma Cas, which were obtained during a time interval of over 6000 days (16.84 yrs) at several observator…
Radio Continuum Emission from FS CMa Stars
L. F. Rodriguez, A. Baez-Rubio, A. S. Miroshnichenko
The FS CMa stars exhibit bright optical emission-line spectra and strong IR excesses. Very little is known of their radio characteristics. We analyzed archive Very Large Array data…
Towards Understanding The B[e] Phenomenon: IV. Modeling of IRAS 00470+6429
Alex C. Carciofi, Anatoly S. Miroshnichenko, Jon E. Bjorkman
FS CMa type stars are a recently described group of objects with the B[e] phenomenon that exhibit strong emission-line spectra and strong IR excesses. In this paper we report the f…