Search Results - Springer

Article

The symbiotic system Z Andromedae during the flare of 2000–2002

Optical and infrared photometric observations of the classical symbiotic binary Z And obtained in quiescent and active phases in 1999–2002 are analyzed. RI photometric data from the literature are used to estimat...

O. G. Taranova, N. A. Tomov, M. T. Tomova, V. I. Shenavrin in Astronomy Reports (2004)

Article

JHKLM photometry for carbon stars

We discuss our JHKLM photometry for nine carbon Mira stars, eighteen carbon semiregular variables, and two oxygen Mira stars. For fourteen carbon stars, we present and analyze their infrared light and color curve...

O. G. Taranova, V. I. Shenavrin in Astronomy Letters (2004)

Article

UBVJHKLM photometry of the symbiotic Mira V407 Cyg in 1998–2002

New results of UBV JHKLM photometry of the symbiotic Mira V407 Cyg performed in 1998–2002 are reported. In 2002, these observations were supplemented with RI observations and a search for rapid variability in the...

E. A. Kolotilov, V. I. Shenavrin, S. Yu. Shugarov, B. F. Yudin in Astronomy Reports (2003)

Article

Infrared photometry of the unique object FG Sge in 1985–2001

Our analysis of many years of infrared photometry of the unique object FG Sge indicates that the dust envelope formed around the supergiant in August 1992 is spherically symmetrical and contains compact, dense...

O. G. Taranova, V. I. Shenavrin in Astronomy Reports (2002)

Article

Photometric observations of R Coronae Borealis in the optical and infrared

The results of long-term photometric observations of R CrB in the UBV JHKLM bands are presented. The temporal and color characteristics of the emission of the star itself and of its extended dust envelope are ana...

V. I. Shenavrin, J. D. Fernie, G. Weigelt, B. F. Yudin in Astronomy Reports (2002)

Article

Observations of a unique minimum of RR Tau in the optical and near infrared

We present observations of the UX Ori star RR Tau in the optical (UBVRI)and near infrared (JHKLM)acquired between November 2000 and April 2001. We recorded a uniquely long (about half a year) Algol-like minimum w...

V. P. Grinin, D. N. Shakhovskoi, V. I. Shenavrin, A. N. Rostopchina… in Astronomy Reports (2002)

Article

Infrared photometry of Sakurai’s object (V4334 Sgr) in 2000

The infrared photometric observations of V4334 Sgr in 2000 are presented. They show that a gradual, but nonmonotonic increase in the optical depth of its dust envelope, which was formed early in 1997, had cont...

A. M. Tatarnikov, V. I. Shenavrin, P. A. Whitelock, M. W. Feast… in Astronomy Letters (2001)

Article

Evolution of the dust envelope of Sakurai’s star (V4334 Sgr) in 1997–1999

We have studied the structural evolution of the dust envelope of V4334 Sgr, starting with the onset of its condensation in 1997. A model with complete cloud cover, with the optical depth growing until the end ...

V. I. Shenavrin, B. F. Yudin in Astronomy Reports (2001)

Article

Infrared observations of the star R Cas

We present our JHKLM photometry for R Cas performed during 1988–2000. The pulsation period of R Cas is $$P \approx 429\mathop .\limit...

A. É. Nadzhip, A. M. Tatarnikov, V. I. Shenavrin, G. Weigelt… in Astronomy Letters (2001)

Article

Infrared photometry of five long-period binaries

We present and discuss JHKLM photometry for five long-period binaries (VV Cep, ZZ CMi, WY Gem, ε Aur, and ζ Aur). The IR radiation from WY Gem may contain a component with a period of ∼430 days, attributable to t...

O. G. Taranova, V. I. Shenavrin in Astronomy Letters (2001)

Article

Infrared photometry of the X-ray binary XTE J1118+480 in April 2000

We present the IR photometry of the X-ray binary XTE J1118+480 performed during seven nights in April and two nights in May–June 2000. A significant IR excess has been detected in the object, which may be due ...

O. G. Taranova, V. I. Shenavrin in Astronomy Letters (2001)

Article

Infrared photometry of the symbiotic novae V1016 Cyg and HM Sge in 1978–1999

The photometric JHKLM observations of the symbiotic novae V1016 Cyg and HM Sge in 1978–1999 are presented. Parameters of the cool stars themselves and the dust envelopes are estimated. The periods of 470±5 days (...

O. G. Taranova, V. I. Shenavrin in Astronomy Letters (2000)

Article

Infrared photometry of Sakurai’s object (V4334 Sgr) in 1996–1999

The infrared photometric observations of V4334 Sgr in 1996–1999 are presented. Together with optical data, they have allowed us to accurately estimate the bolometric flux from this star and to investigate the ...

A. M. Tatarnikov, V. I. Shenavrin, B. F. Yudin, P. A. Whitelock… in Astronomy Letters (2000)

Article

Multicolor photometry of CH Cygni in 1978–1998

We present the results of long-term (1978–1998) infrared and optical observations of the unique symbiotic system CH Cygni. The system’s IR brightness and color variations are generally consistent with a model ...

O. G. Taranova, V. I. Shenavrin in Astronomy Reports (2000)

Article

Solar analogs: Spectral energy distributions and physical parameters of their atmospheres

The angular diameters, radii, and effective temperatures of 16 G0–G5 main-sequence stars with color excesses 0.60≤B-V≤0.68 and parallaxes derived from Hipparcos data have been determined using their infrared flux...

I. N. Glushneva, V. I. Shenavrin, I. A. Roshchina in Astronomy Reports (2000)

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