Search Publications
The 3XMM/SDSS Stripe 82 Galaxy Cluster Survey. I. Cluster catalogue and discovery of two merging cluster candidates
Takey, A.; Durret, F.; Mahmoud, E. +1 more
We present a galaxy cluster survey based on XMM-Newton observations that are located in Stripe 82 of the Sloan Digital Sky Survey (SDSS). The survey covers an area of 11.25 deg2. The X-ray cluster candidates were selected as serendipitously extended detected sources from the third XMM-Newton serendipitous source catalogue (3XMM-DR5). A …
First stars of the ρ Ophiuchi dark cloud. XMM-Newton view of ρ Oph and its neighbors
Pillitteri, I.; Wolk, S. J.; Goodman, A. +1 more
Star formation in molecular clouds can be triggered by the dynamical action of winds from massive stars. Furthermore, X-ray and UV fluxes from massive stars can influence the life time of surrounding circumstellar disks. We present the results of a 53 ks XMM-Newton observation centered on the ρ Ophiuchi A+B binary system. ρ Ophiuchi lies in the ce…
Observations of solar flares with IRIS and SDO
Innes, D. E.; Li, D.; Ning, Z. J.
Flare kernels brighten simultaneously in all Solar Dynamics Observatory (SDO) Atmospheric Imaging Assembly (AIA) channels making it difficult to determine their temperature structure. The Interface Region Imaging Spectrograph (IRIS) is able to spectrally resolve Fe xxi emission from cold chromospheric brightenings, so it can be used to infer the a…
Glancing through the accretion column of EXO 2030+375
Klochkov, Dmitry; Ferrigno, Carlo; Zdziarski, Andrzej A. +3 more
Context. The current generation of X-ray instruments progressively reveals more and more details about the complex magnetic field topology and the geometry of the accretion flows in highly magnetized accretion-powered pulsars.
Aims: We took advantage of the large collecting area and good timing capabilities of the EPIC cameras onboard XMM-New…
The segregation of starless and protostellar clumps in the Hi-GAL ℓ = 224° region
Elia, D.; Olmi, L.; Cunningham, M. +1 more
Context. Stars form in dense, dusty structures, which are embedded in larger clumps of molecular clouds often showing a clear filamentary structure on large scales (≳1 pc). The origin (e.g., turbulence or gravitational instabilities) and evolution of these filaments, as well as their relation to clump and core formation, are not yet fully understo…
Velocity resolved [C II] spectroscopy of the center and the BCLMP 302 region of M 33 (HerM 33es)
Braine, J.; Ossenkopf, V.; van der Werf, P. +8 more
Context. The forbidden fine structure transition of C+ at 158 µm is one of the major cooling lines of the interstellar medium (ISM).
Aims: We aim to understand the contribution of the ionized, atomic, and molecular phases of the ISM to the [C II] emission from clouds near the dynamical center and the BCLMP302 H II region in t…
Mildly obscured active galaxies and the cosmic X-ray background
Walter, R.; Esposito, V.
Context. The diffuse cosmic X-ray background (CXB) is the sum of the emission of discrete sources, mostly massive black-holes accreting matter in active galactic nuclei (AGN). The CXB spectrum differs from the integration of the spectra of individual sources, calling for a large population, undetected so far, of strongly obscured Compton-thick AGN…
The hot gas content of fossil galaxy clusters
Arnaud, M.; Pointecouteau, E.; Pratt, G. W. +1 more
We investigate the properties of the hot gas in four fossil galaxy systems detected at high significance in the Planck Sunyaev-Zeldovich (SZ) survey. XMM-Newton observations reveal overall temperatures of kT ~ 5-6 keV and yield hydrostatic masses M500,HE ≳ 3.5 × 1014M⊙, confirming their nature as bona fide massive …
Multiwavelength campaign on Mrk 509. XV. Global modeling of the broad emission lines in the optical, UV, and X-ray bands
Kaastra, J. S.; Arav, N.; Bianchi, S. +11 more
Aims: We model the broad emission lines present in the optical, UV, and X-ray spectra of Mrk 509, a bright type 1 Seyfert galaxy. The broad lines were simultaneously observed during a large multiwavelength campaign, using the XMM-Newton-OM for the optical lines, HST-COS for the UV lines, and XMM-Newton-RGS and Epic for the X-ray lines. We als…
The slowly pulsating B-star 18 Pegasi: A testbed for upper main sequence stellar evolution
Mugrauer, M.; Irrgang, A.; Moehler, S. +2 more
The predicted width of the upper main sequence in stellar evolution models depends on the empirical calibration of the convective overshooting parameter. Despite decades of discussions, its precise value is still unknown and further observational constraints are required to gauge it. Based on a photometric and preliminary asteroseismic analysis, w…