Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Elkin, V. G."'
Autor:
Butler, A. P., Butler, P. H., Bell, S. T., Chelkov, G. A., Dedovich, D. V., Demichev, M. A., Elkin, V. G., Gostkin, M. I., Kotov, S. A., Kozhevnikov, D. A., Kruchonak, U. G., Nozdrin, A. A., Porokhovoy, S. Yu., Potrap, I. N., Smolyanskiy, P. I., Zakhvatkin, M. M., Zhemchugov, A. S.
This paper describes an iterative method of per-pixel energy calibration of hybrid pixel detectors with GaAs:Cr sensor and Timepix readout chip. A convolution of precisely measured spectra of characteristic X-rays of different metals with the resolut
Externí odkaz:
http://arxiv.org/abs/1501.03334
We present an analysis of high time resolution spectra of the chemically peculiar Ap star HD 213637. The star shows rapid radial velocity variations with a period close to the photometric pulsation period. Radial velocity pulsation amplitudes vary si
Externí odkaz:
http://arxiv.org/abs/1411.3217
Autor:
Hubrig, S., Castelli, F., Gonzalez, J. F., Elkin, V. G., Mathys, G., Cowley, C. R., Wolff, B., Schoeller, M.
The recent availability of ESO's high-resolution spectrograph CRIRES offers now the opportunity to study numerous spectral features in the near-IR in intermediate-mass main-sequence and pre-main-sequence stars. High-resolution CRIRES spectra were obt
Externí odkaz:
http://arxiv.org/abs/1204.0652
New magnetic Ap stars with split Zeeman components are presented. These stars were discovered from observations with the FEROS spectrograph at the ESO 2.2-m telescope. Fifteen new magnetic stars are analysed here. Several stars with very strong magne
Externí odkaz:
http://arxiv.org/abs/1111.6448
Autor:
Kurtz, D. W., Cunha, M. S., Saio, H., Bigot, L., Balona, L. A., Elkin, V. G., Shibahashi, H., Brandao, I. M., Uytterhoeven, K., Frandsen, S., Frimann, S., Hatzes, A., Lueftinger, T., Gruberbauer, M., Kjeldsen, H., Christensen-Dalsgaard, J., Kawaler, S. D.
We have discovered a new rapidly oscillating Ap star among the Kepler Mission target stars, KIC 10195926. This star shows two pulsation modes with periods that are amongst the longest known for roAp stars at 17.1 min and 18.1 min, indicating that the
Externí odkaz:
http://arxiv.org/abs/1102.4298
Autor:
Hubrig, S., Mikulasek, Z., Gonzalez, J. F., Schoeller, M., Ilyin, I., Cure, M., Zejda, M., Cowley, C. R., Elkin, V. G., Pogodin, M. A., Yudin, R. V.
Despite of the importance of magnetic fields for the full understanding of the properties of accreting Herbig Ae/Be stars, these fields have scarcely been studied over the rotation cycle until now. One reason for the paucity of such observations is t
Externí odkaz:
http://arxiv.org/abs/1011.3132
Autor:
Elkin, V. G., Kurtz, D. W., Worters, H. L., Mathys, G., Smalley, B., van Wyk, F., Smith, A. M. S.
We report the detection of short period variations in the stars HD69013 and HD96237. These stars possess large overabundances of rare earth elements and global magnetic fields, thus belong to the class of chemically peculiar Ap stars of the main sequ
Externí odkaz:
http://arxiv.org/abs/1009.4022
The extraordinary magnetic Ap star HD75049 has been studied with data obtained with the ESO VLT and 2.2-m telescopes. Direct measurements reveal that the magnetic field modulus at maximum reaches 30kG. The star shows photometric, spectral and magneti
Externí odkaz:
http://arxiv.org/abs/0908.0849
Autor:
Freyhammer, L. M., Kurtz, D. W., Elkin, V. G., Mathys, G., Savanov, I., Zima, W., Shibahashi, H., Sekiguchi, K.
We have used high-speed spectroscopy of the rapidly oscillating Ap (roAp) star HD99563 to study the pulsation amplitude and phase behaviour of elements in its stratified atmosphere over one 2.91-d rotation cycle. We identify spectral features related
Externí odkaz:
http://arxiv.org/abs/0904.3530
We obtained thirteen spectropolarimetric observations of the strongly magnetic rapidly oscillating Ap star HD154708 over three months with the multi-mode instrument FORS1, installed at the 8-m Kueyen telescope of the VLT. These observations have been
Externí odkaz:
http://arxiv.org/abs/0903.2564