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Chandra and XMM–Newton Observations of H2O Maser Galaxy Mrk 266
Wang, J.; Fan, J. H.; Zhang, J. S.
For H2O megamaser galaxy Mrk 266, its Chandra and XMM–Newton data are analyzed here. It shows existence of two obscured nuclei (separation is ~ 5″). Our preferred model, the high energy reflected model can fit the hard component of both nuclei spectra well.
Clarification on Polarity of Bipolar Electric Field Solitary Structures in Space Plasmas with Satellite Observation
Liu, Zhen-Xing; Shi, Jian-Kui; Qureshi, M. N. S. +1 more
The bipolar electric field solitary (EFS) structures observed frequently in space plasmas by satellites have two different polarities, first positive electric field peak then negative (i.e., positive/negative) and first negative then positive peak (i.e., negative/positive). We provide the physical explanation on the polarity of observed bipolar EF…
Observations of the recurrent M 31 transient XMMU J004215.8+411924 with Swift, Chandra, HST, and Einstein
Pietsch, W.; Barnard, R.; Garcia, M. +2 more
Context. The transient X-ray source XMMU J004215.8+411924 within M 31 was found to be in outburst again in the 2010 May 27 Chandra observation. We present results from our four Chandra and seven Swift observations that covered this outburst.
Aims: X-ray transient behaviour is generally caused by one of two things: mass accretion from a high m…
Bridging model and observed stellar spectra
Allende Prieto, C.
Accurate model stellar fluxes are key for the analysis of observations of individual stars or stellar populations. Model spectra differ from real stellar spectra due to limitations of the input physical data and adopted simplifications, but can be empirically calibrated to maximize their resemblance to actual stellar spectra. We describe a least-s…
V2368 Ophiuchi: an eclipsing and double-lined spectroscopic binary used as a photometric comparison star for U Ophiuchi
Wolf, M.; Harmanec, P.; Yang, S. +8 more
The A-type star HR 6412 = V2368 Oph was used by several investigators as a photometric comparison star for the known eclipsing binary U Oph but was found to be variable by three independent groups, including us. By analysing series of new spectral and photometric observations and a critical compilation of available radial velocities, we were able …
Comment on “An analysis of VLF electric field spectra measured in Titan's atmosphere by the Huygens probe” by J. A. Morente et al.
Berthelier, Jean-Jacques; Béghin, Christian; Hamelin, Michel +4 more
Abstract Available from http://www.agu.org
New aspects of spectral behavior of SS Cyg and WX Hyi between quiescence and outburst states in the UV
Sanad, M. R.
We present low-resolution UV spectra of the dwarf novae SS Cyg and WX Hyi in both quiescence and outburst states from observations taken by the International Ultraviolet Explorer (IUE) during the period between 1978-1994 and 1979-1993 for two systems respectively. Both SS Cyg and WX Hyi are characterized by emission lines in quiescence physical st…
Tidal variations in the Martian lower atmosphere inferred from Mars Express Planetary Fourier Spectrometer temperature data
Grassi, D.; Kasaba, Y.; Formisano, V. +4 more
We report on the characteristics of tidal variations in the Martian lower atmosphere (<45 km) using the Mars Express (MEX) Planetary Fourier Spectrometer (PFS) temperature data for about three Martian years (between the ends of MY26 and MY29). The PFS data, which widely cover local time, enable us to investigate diurnal variations in the atmosp…
Correction to “Are the basins of Titan's Hotei Regio and Tui Regio sites of former low latitude seas?”
Moore, Jeffrey M.; Howard, Alan D.
Abstract Available from http://www.agu.org
Investigating the correlation between high-frequency global oscillations and solar flares
Rabello-Soares, M. C.; Bogart, R. S.; Chakraborty, S. +1 more
Global oscillations have been observed in the high-frequency spectrum in velocity and intensity measurements above the acoustic cutoff frequency of the solar atmosphere. In a recent work, strong correlation at high frequencies, determined between helioseismic spectra and soft x-ray flux has been cited as evidence that solar flares may be one of th…