Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Pavlenko, Ya. V."'
Autor:
Zhang, Z. H., Raddi, R., Burgasser, A. J., Casewell, S. L., Smart, R. L., Galvez-Ortiz, M. C., Jones, H. R. A., Baig, S., Lodieu, N., Gauza, B., Pavlenko, Ya. V., Jiao, Y. F., Zhao, Z. K., Zhou, S. Y., Pinfield, D. J.
We report the discovery of five white dwarf + ultracool dwarf systems identified as common proper motion wide binaries in the Gaia Catalogue of Nearby Stars. The discoveries include a white dwarf + L subdwarf binary, VVV 1256-62AB, a gravitationally
Externí odkaz:
http://arxiv.org/abs/2407.19219
Autor:
Dobrycheva, D. V., Vasylenko, M. Yu., Kulyk, I. V., Pavlenko, Ya. V., Shubina, O. S., Luk'yanyk, I. V., Korsun, P. P.
This study introduces an approach to detecting exocomet transits in the dataset of the Transiting Exoplanet Survey Satellite (TESS), specifically within its Sector 1. Given the limited number of exocomet transits detected in the observed light curves
Externí odkaz:
http://arxiv.org/abs/2402.19075
Autor:
Rushton, M. T., Woodward, C. E., Gehrz, R. D., Evans, A., Kaminsky, B., Pavlenko, Ya. V., Eyres, S. P. S.
We present an analysis of archival Spitzer InfraRed Spectrograph (IRS) observations of the recurrent nova RS Ophiuchi obtained on several occasions, beginning about 7 months after the outburst in 2006. These data show atomic emission lines, absorptio
Externí odkaz:
http://arxiv.org/abs/2209.12626
Autor:
Kaminsky, B., Evans, A., Pavlenko, Ya. V., Woodward, C. E., Banerjee, D. P. K., Gehrz, R. D., Walter, F., Starrfield, S., Ilyin, I., Strassmeier, K. G., Wagner, R. M.
We present an analysis of the red giant component of the recurrent nova V3890 Sgr, using data obtained before and after its 2019 eruption. Its effective temperature is $T_{\rm eff}=3050\pm$200 K for $\log{g}=0.7$, although there are modest changes in
Externí odkaz:
http://arxiv.org/abs/2207.14721
Autor:
Pavlenko, Ya. V., Evans, A., Banerjee, D. P. K., Geballe, T. R., Munari, U., Gehrz, R. D., Woodward, C. E., Starrfield, S.
We report the determination of abundances and isotopic ratios for C, O and Si in the photosphere of the red giant component of the recurrent nova T Coronae Borealis from new 2.284--2.402 $\mu$m and 3.985--4.155 $\mu$m spectroscopy. Abundances and iso
Externí odkaz:
http://arxiv.org/abs/2008.12150
Publikováno v:
A&A 642, A77 (2020)
This study is based on the use of the new ExoMol TiO rovibronic line lists to identify and model TiO isotopologue features in spectra of M-dwarfs. We aim to investigate problems involving the computation of electronic bands for different isotopologue
Externí odkaz:
http://arxiv.org/abs/2008.02092
Publikováno v:
A&A 633, A52 (2020)
The first overtone ($\Delta v$ = 2) bands of the monosubstituted isotopologues of CO at 2.3 $\mu$m in the spectrum of Arcturus (K2 III), and of the monosubstituted isotopologues of SiO at 4 $\mu$m in the spectrum of the red giant HD196610 (M6 III) ar
Externí odkaz:
http://arxiv.org/abs/1911.12326
Autor:
Pavlenko, Ya. V., Mascareno, A. Suarez, Osorio, M. R. Zapatero, Rebolo, R., Lodieu, N., Bejar, V. J. S., Hernandez, J. I. Gonzalez, Mohorian, M.
Publikováno v:
A&A 626, A111 (2019)
We study temporal variations of the emission lines of Halpha, Hepsilon, H and K Ca II, D1 and D2 Na I, 4026 and 5876 A He I in the HARPS spectra of Proxima Centauri across an extended time of 13.2 years, from May 27, 2004, to September 30, 2017. Aims
Externí odkaz:
http://arxiv.org/abs/1905.07347
Autor:
Evans, A., Pavlenko, Ya. V., Banerjee, D. P. K., Munari, U., Gehrz, R. D., Woodward, C. E., Starrfield, S., Helton, L. A., Shahbandeh, M., Davis, S., Dallaporta, S., Cherini, G.
We report the discovery of the diatomic molecule SiO in the gas phase in the environment of the recurrent nova T Coronae Borealis. While some of the SiO is photospheric, a substantial portion must arise in the wind from the red giant component of T C
Externí odkaz:
http://arxiv.org/abs/1904.04731
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