Browsing by Author "Bikmaev I."

Sort by: Order: Results:

  • A highly eccentric spectroscopic binary star: HD 5624 
    Yilmaz M.; Selam S.; Izumiura H.; Bikmaev I.; Sato B.; Keskin V.; Kambe E. (2019)
    © 2019, Astronomical Institute, Slovak Academy of Sciences. In this study, we present an orbital solution for precise radial velocity (PRV) measurements of HD 5624. We obtained high resolution spectroscopic data using the ...
  • A Jupiter-mass planet around the K0 giant HD 208897 
    Yllmaz M.; Sato B.; Bikmaev I.; Selam S.; Izumiura H.; Keskin V.; Kambe E.; Melnikov S.; Galeev A.; Özavcl; Irtuganov E.; Zhuchkov R. (2017)
    © ESO, 2017. For over 10 years, we have carried out a precise radial velocity (RV) survey to find substellar companions around evolved G, K-type stars to extend our knowledge of planet formation and evolution. We performed ...
  • A snapshot of the oldest active galactic nuclei feedback phases 
    Brienza M.; Shimwell T.W.; de Gasperin F.; Bikmaev I.; Bonafede A.; Botteon A.; Brüggen M.; Brunetti G.; Burenin R.; Capetti A.; Churazov E.; Hardcastle M.J.; Khabibullin I.; Lyskova N.; Röttgering H.J.A.; Sunyaev R.; van Weeren R.J.; Gastaldello F.; Mandal S.; Purser S.J.D.; Simionescu A.; Tasse C. (2021)
    Active galactic nuclei inject large amounts of energy into their host galaxies and surrounding environment, shaping their properties and evolution1,2. In particular, active-galactic-nuclei jets inflate cosmic-ray lobes, ...
  • Abundance analysis of targets for the COROT/MONS asteroseismology missions II. Abundance analysis of the COROT main targets 
    Bruntt H.; Bikmaev I.; Catala C.; Solano E.; Gillon M.; Magain P.; Van't Veer-Menneret C.; Stütz C.; Weiss W.; Ballereau D.; Bouret J.; Charpinet S.; Hua T.; Katz D.; Lignières F.; Lueftinger T. (2004)
    One of the goals of the ground-based support program for the COROT and MONS/RØMER satellite missions is to characterize suitable target stars for the part of the missions dedicated to asteroseismology. We present the ...
  • Additional spectroscopic redshift measurements for galaxy clusters from the first Planck catalogue 
    Vorobyev V.; Burenin R.; Bikmaev I.; Khamitov I.; Dodonov S.; Zhuchkov R.; Irtuganov E.; Mescheryakov A.; Melnikov S.; Semena A.; Tkachenko A.; Aghanim N.; Sunyaev R. (2016)
    © 2015, Pleiades Publishing, Inc.We present the results of spectroscopic redshift measurements for the galaxy clusters from the first all-sky Planck catalogue that have been mostly identified based on the optical observations ...
  • An abundance analysis of the single-lined spectroscopic binaries with barium stars-like orbital elements: I. Analysis and results 
    Začs L.; Musaev F.; Bikmaev I.; Alksnis O. (1997)
    Detailed abundance analyses have been carried out for 17 single-lined binaries (giants and dwarfs) with orbital elements and mass functions similar to those of barium stars, using high-dispersion CCD spectra and model ...
  • An abundance analysis of the single-lined spectroscopic binaries with barium stars-like orbital elements: II. The spectroscopic data 
    Začs L.; Alksnis O.; Musaev F.; Bikmaev I.; Galazutdinov G. (1999)
    High-resolution spectroscopic observations are presented for 19 single-lined binaries (giants and dwarfs) with orbital elements and mass functions similar to those of barium stars, two radial velocity non-variable barium ...
  • Analysis of fundamental parameters for V477 Lyr 
    Shimansky V.; Pozdnyakova S.; Borisov N.; Bikmaev I.; Galeev A.; Sakhibullin N.; Spiridonova O. (2008)
    We analyze the photometric and spectroscopic observations of the young pre-cataclysmic variable (pre-CV) V477 Lyr. The masses of both binary components have been corrected by analyzing their radial velocity curves. We show ...
  • Analysis of optical light curves for the components of the gravitationally lensed quasar SBS 1520+530 based on observations with the 1.5-m RTT-150 telescope in 2001-2005 
    Khamitov I.; Bikmaev I.; Aslan Z.; Sakhibullin N.; Vlasyuk V.; Zheleznyak A.; Zakharov A. (2006)
    We present the R c-band light curves for components A and B of the gravitationally lensed quasar SBS 1520+530 obtained during 2001-2005 with the 1.5-m Russian-Turkish Telescope (RTT-150) at the TUBITAK National Observatory ...
  • Analysis of reflection effects in HS 2333+3927 
    Shimanskii V.; Yakin D.; Borisov N.; Bikmaev I. (2012)
    The results of photometric and spectroscopic observations of the pre-cataclysmic variable HS 2333+3927, which is a HW Vir binary system, are analyzed. The parameters of the sdB subdwarf companion (T eff = 37 500 ± 500 K, ...
  • Analysis of spectra of V471 Tau and HD 115404 
    Shimansky V.; Bikmaev I.; Shimanskaya N. (2011)
    We analyze the chemical composition of the atmospheres of a single K-type star HD 115404 and the secondary component of the V471 Tau variable. We use the technique of modeling of synthetic spectra to analyze the high-resolution ...
  • Analysis of the FF Aqr spectra 
    Shimanskaya N.; Bikmaev I.; Shimansky V. (2011)
    We determine the atmospheric parameters of the secondary in the close binary system FF Aqr and analyze its chemical composition. A series of high-resolution spectra are taken at different orbital phases using the coude ...
  • Analysis of the optical emission of the young precataclysmic variables HS 1857+5144 and ABELL 65 
    Shimansky V.; Pozdnyakova S.; Borisov N.; Bikmaev I.; Vlasyuk V.; Spiridonova O.; Galeev A.; Mel'nikov S. (2009)
    We analyze the physical state and the properties of the close binary systems HS 1857+5144 and Abell 65. We took the spectra of both systems over a wide range of orbital phases with the 6-m telescope of the Special Astrophysical ...
  • Aperiodic optical variability of intermediate polars-cataclysmic variables with truncated accretion disks 
    Revnivtsev M.; Burenin R.; Bikmaev I.; Kniazev A.; Buckley D.; Pretorius M.; Khamitov I.; Ak T.; Eker Z.; Melnikov S.; Crawford S.; Pavlinsky M. (2010)
    We study the power spectra of the variability of seven intermediate polars containing magnetized asynchronous accreting white dwarfs, XSS J00564+4548, IGR J00234+6141, DO Dra, V1223 Sgr, IGR J15094-6649, IGR J16500-3307 ...
  • Around-the-clock observations of the Q0957+561A,B gravitationally lensed quasar. II. Results for the second observing season 
    Colley W.; Schild R.; Abajas C.; Alcalde D.; Aslan Z.; Bikmaev I.; Chavushyan V.; Chinarro L.; Cournoyer J.; Crowe R.; Dudinov V.; Evans A.; Jeon Y.; Goicoechea L.; Golbasi O.; Khamitov I.; Kjernsmo K.; Lee H.; Lee J.; Lee K.; Lee M.; Lopez-Cruz O.; Mediavilla E.; Moffat A.; Mujica R.; Ullan A.; Muñoz J.; Oscoz A.; Park M.; Purves N.; Saanum O.; Sakhibullin N.; Serra-Ricart M.; Sinelnikov I.; Stabell R.; Stockton A.; Teuber J.; Thompson R.; Woo H.; Zheleznyak A. (2003)
    We report on an observing campaign in 2001 March to monitor the brightness of the later arriving Q0957+561B image in order to compare with the previously published brightness observations of the (first-arriving) A image. ...
  • Atmospheric chemical composition of the "twin" components of equal mass in the CP SB2 system 66 Eri 
    Yushchenko A.; Gopka V.; Khokhlova V.; Musaev F.; Bikmaev I. (1999)
    We determine the atmospheric chemical composition of the components of the CP SB2 system 66 Eri with approximately equal masses (MA/MB = 0.97) by using two CCD echelle spectra of the star. These spectra have been taken ...
  • Barium abundances in cool dwarf stars as a constraint to s- and r-process nucleosynthesis 
    Mashonkina L.; Gehren T.; Bikmaev I. (1999)
    We revise barium abundances in 11 cool stars with metallicities ranging from -2.65 to 0.05. The results are based on differential NLTE model atmosphere analyses of spectra that have a typical S/N of 200 and a resolution ...
  • Broad band variability of SS433: Accretion disk at work? 
    Revnivtsev M.; Fabrika S.; Abolmasov P.; Postnov K.; Bikmaev I.; Burenin R.; Pavlinsky M.; Sunyaev R.; Khamitov I.; Sakhibullin N. (2006)
    We present broad band power spectra of variations of SS433 in radio, optical and X-ray spectral bands. We show that at frequencies lower than 10 -5 Hz the source demonstrates the same variability pattern in all these bands. ...
  • Chemical composition of 15 photometric analogues of the sun 
    Galeev A.; Bikmaev I.; Musaev F.; Galazutdinov G. (2004)
    The results of a spectroscopic analysis of 15 stars that are photometric analogues of the Sun are reported. The effective temperatures and surface gravities in the stellar atmospheres are derived from published photometric ...
  • Chemical composition of δ Scuti stars: 1. AO CVn, CP Boo, KW Aur 
    Galeev A.; Ivanova D.; Shimansky V.; Bikmaev I. (2012)
    We used high-resolution echelle spectra acquired with the 1. 5-m Russian-Turkish Telescope to determine the fundamental atmospheric parameters and abundances of 30 chemical elements for three δ Scuti stars: AOCVn, CP Boo, ...

Search DSpace

Browse

My Account