Zobrazeno 1 - 10
of 19
pro vyhledávání: '"M. S. Catalán"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 336:611-620
We employ high-resolution echelle spectroscopy to measure the projected rotational velocity, V r o t sin i, in the post-common-envelope binaries EG UMa, HZ 9 and RE J1629 + 780. For EG UMa we obtain consistent V r o t σin ι measurements from the Na
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 335:593-609
We present high-resolution echelle spectroscopy that confirms, via the identification of numerous chromospheric emission lines, the extremely high levels of chromospheric activity displayed by the secondary stars in post-common-envelope binaries (PCE
Autor:
M. S. Catalán, Raymundo Baptista
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 324:599-611
(Abridged) We report on the analysis of high-speed photometry of the dwarf nova EX Dra through its outburst cycle with eclipse mapping techniques. The eclipse maps show evidence of the formation of a one-armed spiral structure in the disc at the earl
Publikováno v:
Scopus-Elsevier
(abridged abstract) We present multi-epoch high-resolution spectroscopy and photoelectric polarimetry of the long-period polar (AM Herculis star) QQ Vul. The blue emission lines show several distinct components, the sharpest of which can unequivocall
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 312:70-82
We present spectra in the range 8000–8665 A of the close, detached M-dwarf–white-dwarf binaries EG UMa and PG 1026+002. The Na i absorption doublet (8183, 8195 A) is detected along with a number of other absorption lines including intrinsically n
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 311:135-148
A time-resolved spectroscopic study of V603 Aql (Nova Aquilae 1918) is presented. An orbital period of Porb=01385±00002, consistent with previous results, and a radial velocity semi-amplitude of K=20±3 km s−1 are obtained from the radial velocity
Analysis of the oscillations in HST observations of the quiescent SU UMa type dwarf nova WZ Sagittae
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 310:750-758
ABSTRA C T An analysis of the UV oscillations in WZ Sge is presented, in which we obtain the oscillation amplitude spectra. We find a strong 27.9-s oscillation in our Hubble Space Telescope (HST) UV and zeroth-order light curves as well as weaker osc
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 310:398-406
We present results from photometric observations of the dwarf nova system HT Cas during the eruption of November 1995. The data include the first two--colour observations of an eclipse on the rise to outburst. They show that during the rise to outbur
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 300:233-243
We report on high-speed eclipse photometry of the dwarf nova V2051 Oph while it was in a low brightness state, at B ~ 16.2 mag. In comparison to the average IUE spectra, the ultraviolet continuum and emission lines appear reduced by factors of, respe
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 287:271-286