Zobrazeno 1 - 10
of 374
pro vyhledávání: '"Sion, Edward M"'
Autor:
Godon, Patrick, Sion, Edward M., Gänsicke, Boris T., Hubeny, Ivan, de Martino, Domitilla, Pala, Anna F., Rodríguez-Gil, Pablo, Szkody, Paula, Toloza, Odette
We present a spectral analysis of the spectrum from the Hubble Space Telescope Cosmic Origins Spectrograph (HST/COS) of the southern VY Scl nova-like variable BB Doradus, obtained as part of a Cycle 20 HST/COS survey of accreting white dwarfs (WDs) i
Externí odkaz:
http://hdl.handle.net/10150/622674
http://arizona.openrepository.com/arizona/handle/10150/622674
http://arizona.openrepository.com/arizona/handle/10150/622674
Autor:
Godon, Patrick, Sion, Edward M.
Taking advantage of the now available Gaia EDR3 parallaxes, we carry out an archival {\it Hubble Space Telescope} (HST) far ultraviolet spectroscopic analysis of 10 cataclysmic variable systems, including 5 carefully selected eclipsing systems. We ob
Externí odkaz:
http://arxiv.org/abs/2203.11020
Autor:
Szkody, Paula, Godon, Patrick, Gaensicke, Boris T., Kafka, Stella, Castillo, Odette F. T., Bell, Keaton J., Cho, P. B., Sion, Edward M., Kumar, Praphull, Townsley, Dean M., Vanderbosch, Zach, Winget, Karen I., Loohuis, Claire J. Olde
Following the pulsation spectrum of a white dwarf through the heating and cooling involved in a dwarf nova outburst cycle provides a unique view of the changes to convective driving that take place on timescales of months versus millenia for non-accr
Externí odkaz:
http://arxiv.org/abs/2104.14720
Autor:
Sparks, Warren M., Sion, Edward M.
A substantial fraction of Cataclysmic Variables (CVs) reveals non-solar abundances. A comprehensive list of CVs which includes those that have been examined for these abundances is given. Three possible sources of these non-solar abundances on the se
Externí odkaz:
http://arxiv.org/abs/2103.14149
The spectra of disc-dominated cataclysmic variables (CVs) often deviate from the spectra of accretion disc models; in particular, the Balmer jump and absorption lines are found to be shallower in the observations than in the models. We carried out a
Externí odkaz:
http://arxiv.org/abs/2004.07908
We present a far ultraviolet spectroscopic analysis of the slowest known symbiotic nova AG Peg (M3/4III giant + hot white dwarf; P = 818.4 days) which underwent a nova explosion in 1850 followed by a very slow decline that did not end until 1996, mar
Externí odkaz:
http://arxiv.org/abs/1902.10002
Autor:
Sion, Edward M., Wilson, R. E., Godon, Patrick, Starrfield, Sumner, Williams, Robert E., Darnley, Matt J.
An HST COS Far UV spectrum (1170 A to 1800 A) was obtained for the short orbital period recurrent novae (T Pyxidis subclass), CI Aquilae. CI Aql is the only classical CV known to have two eclipses of sensible depth per orbit cycle and also have pre-
Externí odkaz:
http://arxiv.org/abs/1812.09993
We have used HST/COS to obtain a series of 4 FUV (915-2148A) spectroscopic observations of the prototypical dwarf nova U Geminorum during its cooling following a two-week outburst. Our FUV spectral analysis of the data indicates that the white dwarf
Externí odkaz:
http://arxiv.org/abs/1710.08539
The standard disk is often inadequate to model disk-dominated cataclysmic variables (CVs) and generates a spectrum that is bluer than the observed UV spectra [Puebla et al 2007]. X-ray observations of these systems reveal an optically thin boundary l
Externí odkaz:
http://arxiv.org/abs/1708.00325
Autor:
Szkody, Paula, Mukadam, Anjum S., Toloza, Odette, Gänsicke, Boris T., Dai, Zhibin, Pala, Anna F., Waagen, Elizabeth O., Godon, Patrick, Sion, Edward M.
Time-tag ultraviolet data obtained on the Hubble Space Telescope in 2013 reveal interesting variability related to the white dwarf spin in the two cataclysmic variables RZ Leo and CC Scl. RZ Leo shows a period at 220s and its harmonic at 110s, thus i
Externí odkaz:
http://arxiv.org/abs/1702.04076