Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Varol Keskin"'
Autor:
I. F. Bikmaev, Varol Keskin, Hideyuki Izumiura, E. N. Irtuganov, M. Yılmaz, S. S. Melnikov, Bun'ei Sato, Norio Okada, R. Ya. Zhuchkov, A. I. Galeev, Eiji Kambe, Selim O. Selam, I. Özavcı
Publikováno v:
New Astronomy. 34:108-113
We present three low-mass and one solar mass companions found around four intermediate-mass giants HD1695, HD120235, HD145316 and HD200004 from precise radial velocity measurements using the 1.5 m Russian-Turkish Telescope (RTT150) at the TUBITAK Nat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43d0beac1d94b79767b983434707eb9b
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100724344
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100724344
Autor:
I. F. Bikmaev, M. Yılmaz, E. N. Irtuganov, Varol Keskin, R. Ya. Zhuchkov, Selim O. Selam, Hideyuki Izumiura, I. Özavcı, A. I. Galeev, Eiji Kambe, S. Melnikov, Bun'ei Sato
WOS: 000416942200014
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 high precision
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 high precision
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16a10c1c6eee1952c2ee085b7db7b518
Publikováno v:
Astrophysics and Space Science. 323:75-81
We present multi-colour CCD observations of the low-temperature contact binaries, V453 Mon and V523 Cas. Their light curves are modelled to determine a new set of stellar and orbital parameters. Analysis of mid-eclipse times yields a new linear ephem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ea6c67534e2f955ef463a187ebb2447
https://doi.org/10.1007/s10509-009-0048-0
https://doi.org/10.1007/s10509-009-0048-0
Autor:
S. Evren, Tuncay Özdemir, Selim O. Selam, Nazim Aksaker, Sinan Kaan Yerli, T. Ozisik, Varol Keskin, Volkan Bakiş, Kazım Kaba, Erdem Erdi, O. Demircan, Tansel Ak, İbrahim Küçük, Mehmet Akif Erdoğan, Zeki Aslan
A site selection of potential observatory locations in Turkey have been carried out by using Multi-Criteria Decision Analysis (MCDA) coupled with Geographical Information Systems (GIS) and satellite imagery which in turn reduced cost and time and inc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::183f016e74c33b096b314d32267ece52
https://hdl.handle.net/20.500.12605/11363
https://hdl.handle.net/20.500.12605/11363
Autor:
Z. Aslan, L. N. Panteleev, N. A. Sakhibullin, R. A. Sunyaev, Varol Keskin, S. F. Kamus, É. A. Vitrichenko, Selim O. Selam, A. L. Yaskovich, I. F. Bikmaev, I. M. Khamitov, L. A. Dembo, R. Gumerov, M. N. Pavlinsky, Ümit Kiziloğlu
Publikováno v:
Astronomy Letters. 27:398-403
The AZT-22 telescope installed in Turkey (Antalia) was aligned and tested on stars by the Hartmann method. The rms normal deviation of an equivalent optical system is 0.040±0.016 µm. The circle of confusion is 0.40±0.04 arcsec in diameter at a 50%
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a0c33a5a2c360f243f6caf51fd4b87a
https://doi.org/10.1134/1.1374679
https://doi.org/10.1134/1.1374679
Publikováno v:
Astrophysics and Space Science. 257:83-94
The light curves, obtained by the authors of the present paper during the period 1978–1992, of the chromospherically active binary system RT Lac were examined. The average (B–V) colour indices were obtained and corrected for the interstellar exti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f007765553882ddd20673e12436facdf
https://doi.org/10.1023/a:1001051301322
https://doi.org/10.1023/a:1001051301322
Autor:
I. F. Bikmaev, Bun'ei Sato, Eiji Kambe, Selim O. Selam, M. Yılmaz, Hideyuki Izumiura, H. Ando, Varol Keskin
Publikováno v:
SCOPUS13841076-2013-20-1-SID84867612236
A small group of collaborators was established at the end of 2007 with the objective of starting an extra-solar planet search at the TUBITAK National Observatory of Turkey. High resolution spectra of some radial velocity standards and planet-harbouri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab3cfba8dec5c3eeaa22607d188baf69
https://openrepository.ru/article?id=44907
https://openrepository.ru/article?id=44907
Publikováno v:
Astronomische Nachrichten. 325:652-654
A custom meteorological monitoring system was constructed to reliably monitor the meteorological parameters of the site of TUBITAK National Observatory (TUBITAK: The Scientific and Technical Research Council of Turkey). The site is located on a mount
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0600ba957ca715b0796afd4cc89efab9
https://doi.org/10.1002/asna.200410311
https://doi.org/10.1002/asna.200410311
In this study, we present photometric and spectroscopic variations of the extremely small mass ratio ($q\simeq 0.1$) late-type contact binary system \astrobj{V1191 Cyg}. The parameters for the hot and cooler companions have been determined as $M_\tex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb14002583afab0639bf5f6dba73af79
https://aperta.ulakbim.gov.tr/record/84325
https://aperta.ulakbim.gov.tr/record/84325
In this study, we present long term photometric variations of the close binary system \astrobj{GO Cyg}. Modelling of the system shows that the primary is filling Roche lobe and the secondary of the system is almost filling its Roche lobe. The physica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7acdc8454088adacb515f5cdc08e3bc
http://arxiv.org/abs/1109.2634
http://arxiv.org/abs/1109.2634