Search Publications
Three-dimensional model of the irradiance of cometary nuclei: Using the nucleus of comet 67P/Churyumov–Gerasimenko as an example
Dorofeeva, V. A.; Marov, M. Ya.; Rusol, A. V.
The goal of this paper is to construct a 3D model of the surface of a cometary nucleus that allows the irradiance nonuniformity and temperature distribution to be investigated. This is very important, because in zones with a maximum surface temperature chemical and physical transformations of material are possible in subsurface layers. We propose …
Spectral behavior of the symbiotic nova AG Pegasi observed with IUE and HST
Sanad, M. R.; Bobrowsky, M.
Ultraviolet spectra from the International Ultraviolet Explorer (IUE) and from the Hubble Space Telescope (HST) of the symbiotic novae AG Peg during the period 1978-1996 are analyzed. Some spectra showing the modulations of spectral lines at different times are presented. We determined the reddening from the 2200 Å feature, finding that E(B-V) = 0…
Spectral Properties and Variability of BIS objects
Nesci, R.; Rossi, C.; Gaudenzi, S. +3 more
Through the analysis and interpretation of newly obtained and of literature data we have clarified the nature of poorly investigated IRAS point sources classified as late type stars, belonging to the Byurakan IRAS Stars catalog. From medium resolution spectroscopy of 95 stars we have strongly revised 47 spectral types and newly classified 31 sourc…
Catalog of 3<z<5.5 quasar candidates selected among XMM-Newton sources and its spectroscopic verification
Khorunzhev, Georgii; Sazonov, Sergey; Burenin, Rodion +1 more
We have compiled a catalog of 903 quasar candidates (including known quasars) at 3<z<5.5 selected among X-ray sources from the XMM-Newton serendipitous survey (3XMM-DR4 catalog). We used photometric SDSS, 2MASS and WISE data to select the objects. The surface number density of objects in our sample exceeds that in the SDSS spectroscopic quas…
A submillimeter study of the IR dust bubble S 21 and its environs
Rubio, M.; Borissova, J.; Firpo, V. +4 more
Based on the molecular emission in the 12CO(2-1) and 13CO(2-1) lines, and on the continuum emission in the MIR and FIR towards the S 21 IR dust bubble, we analyze the physical characteristics of the gas and dust linked to the nebula and the presence of young stellar objects (YSOs) in its environs. The line emission reveals a …
An All-Sky Portable (ASP) Optical Catalogue
Flesch, Eric Wim
This optical catalogue combines the all-sky USNO-B1.0/A1.0 and most-sky APM catalogues, plus overlays of SDSS optical data, into a single all-sky map presented in a sparse binary format that is easily downloaded at 9 Gb zipped. Total count is 1 163 237 190 sources and each has J2000 astrometry, red and blue magnitudes with PSFs and variability ind…
The role of XMM-Newton for present and next-generation Sunyaev-Zeldovich experiments
Pointecouteau, E.
A strong synergy exists between observations of the hot gas trapped in the potential well of galaxy clusters at X-ray wavelengths and through the Sunyaev-Zeldovich (SZ) effect. XMM-Newton has been a major asset in joint scientific analysis with data from the current generation of SZ instruments such as Planck, SPT, or ACT. I review the main X-ray …
PHL 6625: A Minor Merger-associated QSO Behind NGC 247
Tao, Lian; Feng, Hua; Kaaret, Philip +5 more
PHL 6625 is a luminous quasi-stellar object (QSO) at z = 0.3954 located behind the nearby galaxy NGC 247 (z = 0.0005). Hubble Space Telescope observations revealed an arc structure associated with it. We report on spectroscopic observations with the Very Large Telescope and multiwavelength observations from the radio to the X-ray band for the syst…
Future space missions: the inner region of the Solar system
Vasylenko, A. A.
The paper deals with an overview of space missions to explore the inner region of the Solar System, the nearest on time of their launch, namely, Probe Plus, Solar Orbiter, BepiColombo, EXOMars, and InSight. Each of them will study either the Sun or the planet of the Earth group. Their launches are planned for 2018-2020. We describe briefly predest…
A (likely) X-ray jet from NGC6217 observed by XMM-Newton
Larsson, Josefin; Falocco, Serena; Nandi, Sumana
NGC6217 is a nearby spiral galaxy with a starburst region near its centre. Evidence for a low-luminosity Active Galactic Nucleus (AGN) in its core has also been found in optical spectra. Intriguingly, X-ray observations by ROSAT revealed three knots aligned with the galaxy centre, resembling a jet structure. This paper presents a study of XMM-Newt…