Search Publications
Missions
Journals
Publication Years
A Universal Decline Law of Classical Novae. III. GQ Muscae 1983
Cassatella, Angelo; Kato, Mariko; Hachisu, Izumi
We present a unified model of infrared (IR), optical, ultraviolet (UV), and X-ray light curves for the 1983 outburst of GQ Muscae (Nova Muscae 1983) and estimate its white dwarf (WD) mass. Based on an optically thick wind model of nova outbursts, we model the optical and IR light curves with free-free emission, and the UV 1455 Å and supersoft X-ra…
XMM-Newton X-ray spectra of the SNR 0509-67.5: data and models
Vink, J.; Kosenko, D.; Blinnikov, S. +1 more
Aims: We report on X-ray observations of the supernova remnant 0509-67.5 in the Large Magellanic Cloud acquired by the XMM-Newton X-ray observatory. We use the imaging spectroscopy (EPIC) and Reflective Grating Spectrometer (RGS) data to investigate properties of the remnant and its environment.
Methods: The X-ray spectra were analyzed with SP…
Star formation in the hosts of GHz peaked spectrum and compact steep spectrum radio galaxies
O'Dea, C. P.; Labiano, A.; Baum, S. A. +2 more
Aims:We are searching for star formation regions in the hosts of potentially young radio galaxies (gigahertz peaked spectrum and compact steep spectrum sources).
Methods: We used near-UV imaging with the Hubble Space Telescope Advanced Camera for Surveys.
Results: We find near-UV light could be the product of recent star formation in five …
Observations of Low-Latitude Coronal Plumes
Wang, Y. -M.; Muglach, K.
Using Fe IX/X 17.1 nm observations from the Extreme-Ultraviolet Imaging Telescope (EIT) on the Solar and Heliospheric Observatory (SOHO), we have identified many coronal plumes inside low-latitude coronal holes as they transited the solar limb during the late declining phase of cycle 23. These diffuse, linear features appear to be completely analo…
Deep Infrared Observations of the Puzzling Central X-Ray Source in RCW 103
Caraveo, P. A.; Bignami, G. F.; Mereghetti, S. +4 more
The object 1E 161348-5055 (1E 1613) is a pointlike, soft X-ray source shining at the center of the 2000 yr old supernova remnant (SNR) RCW 103. It features a puzzling 6.67 hr periodicity and dramatic variability over a timescale of a few years. This, coupled with a young age and the lack of an obvious optical counterpart, makes 1E 1613 a unique so…
Earth X-ray albedo for cosmic X-ray background radiation in the 1-1000 keV band
Sunyaev, R.; Revnivtsev, M.; Sazonov, S. +1 more
We present calculations of the reflection of the cosmic X-ray background (CXB) by the Earth's atmosphere in the 1-1000 keV energy range. The calculations include Compton scattering and X-ray fluorescent emission and are based on a realistic chemical composition of the atmosphere. Such calculations are relevant for CXB studies using the Earth as an…
Intermittency in the Photosphere and Corona above an Active Region
Wang, Haimin; Yurchyshyn, Vasyl; Abramenko, Valentyna
Recent studies have demonstrated without doubt that the magnetic field in the photosphere and corona is an intermittent structure, opening new views of the underlying physics. In particular, such problems as the existence in the corona of localized areas with extremely strong resistivity (required to explain magnetic reconnection at all scales) an…
Red giant clump in the Tycho-2 catalogue
Gontcharov, G. A.
The Tycho-2 proper motions and Tycho-2 and 2MASS photometry are used to select 97348 red giant clump (RGC) stars. The interstellar extinction and photometric distance are calculated for each of the stars. The selected stars are shown to form a selection-unbiased sample of RGC stars within about 350 pc of the Sun with the addition of more distant s…
Mid-Infrared Spectra of High-Redshift (z > 2) Radio Galaxies
Stern, D.; Fazio, G. G.; Seymour, N. +8 more
We present the first mid-infrared Spitzer/Infrared Spectrograph (IRS) observations of powerful radio galaxies at z > 2. These radio galaxies, 4C +23.56 (z = 2.48) and 6C J1908+7220 (z = 3.53), both show strong mid-infrared continua, but with 6C J1908+7220 also showing strong PAH emission at rest-frame 6.2 and 7.7 µm. In 4C +23.56 we see n…
An X-ray and optical study of the ultracompact X-ray binary A 1246-58
Verbunt, F.; in't Zand, J. J. M.; Méndez, M. +4 more
Results are discussed of an X-ray and optical observation campaign of the low-mass X-ray binary A 1246-58 performed with instruments on Satellite per Astronomia X (“BeppoSAX”), the Rossi X-ray Timing Explorer (RXTE), the X-ray Multi-mirror Mission (“XMM-Newton”), the Swift mission, and the Very Large Telescope. Spectra and flux time histories are …