Search Publications
Identifying XMM-Newton observations affected by solar wind charge exchange - Part II
Read, A. M.; Carter, J. A.; Sembay, S.
Aims: We wished to analyse a sample of observations from the XMM-Newton Science Archive to search for evidence of exospheric solar wind charge exchange (SWCX) emission.
Methods: We analysed 3012 observations up to and including revolution 1773. The method employed extends from that of the previously published paper by these authors on th…
Photochemistry of polycyclic aromatic hydrocarbons in cosmic water ice. I. Mid-IR spectroscopy and photoproducts
Allamandola, L. J.; Bouwman, J.; Linnartz, H. +1 more
Context. Polycyclic aromatic hydrocarbons (PAHs) are known to be abundantly present in photon-dominated regions (PDRs), as evidenced by their ubiquitous mid-IR emission bands. Towards dense clouds, however, their IR emission bands are strongly suppressed. It is here where molecules are known to reside on very cold grains (T ≤ 30 K) in the form of …
OH emission from warm and dense gas in the Orion Bar PDR
Le Bourlot, J.; Contursi, A.; Bergin, E. A. +7 more
As part of a far-infrared (FIR) spectral scan with Herschel/PACS, we present the first detection of the hydroxyl radical (OH) towards the Orion Bar photodissociation region (PDR). Five OH (X 2Π; ν = 0) rotational Λ-doublets involving energy levels out to Eu/k ~ 511 K have been detected (at ~65, ~79, ~84, ~119 and ~163 µ…
Observation of H2O in a strongly lensed Herschel-ATLAS source at z = 2.3
Smail, I.; Omont, A.; Clements, D. L. +54 more
The Herschel survey, H-ATLAS, with its large areal coverage, has recently discovered a number of bright, strongly lensed high-z submillimeter galaxies. The strong magnification makes it possible to study molecular species other than CO, which are otherwise difficult to observe in high-z galaxies. Among the lensed galaxies already identified by H-A…
Dynamical evolution of a magnetic cloud from the Sun to 5.4 AU
Mandrini, C. H.; Gulisano, A. M.; Démoulin, P. +2 more
Context. Significant quantities of magnetized plasma are transported from the Sun to the interstellar medium via interplanetary coronal mass ejections (ICMEs). Magnetic clouds (MCs) are a particular subset of ICMEs, forming large-scale magnetic flux ropes. Their evolution in the solar wind is complex and mainly determined by their own magnetic for…
X-ray monitoring of classical novae in the central region of M 31. II. Autumn and winter 2007/2008 and 2008/2009
Della Valle, M.; Pietsch, W.; Haberl, F. +7 more
Context. Classical novae (CNe) represent the major class of supersoft X-ray sources (SSSs) in the central region of the galaxy M 31.
Aims: We performed a dedicated monitoring of the M 31 central region with XMM-Newton and Chandra between Nov. 2007 and Feb. 2008 and between Nov. 2008 and Feb. 2009, respectively, to find SSS counterparts of CNe…
Tidal streams around galaxies in the SDSS DR7 archive. I. First results
Bomans, D. J.; Dettmar, R. -J.; Miskolczi, A.
Context. Models of hierarchical structure formation predict the accretion of smaller satellite galaxies onto more massive systems and this process should be accompanied by a disintegration of the smaller companions visible, e.g., in tidal streams.
Aims: In order to verify and quantify this scenario we have developed a search strategy for low …
First simultaneous multi-wavelength observations of the black hole candidate IGR J17091-3624. ATCA, INTEGRAL, Swift, and RXTE views of the 2011 outburst
Tomsick, J. A.; Rodriguez, J.; Cadolle Bel, M. +5 more
We present the results of the first four (quasi-)simultaneous radio (ATCA), X-ray (Swift, RXTE), and γ-ray (INTEGRAL) observations of the black hole candidate IGR J17091-3624, performed in February and March 2011. The X-ray analysis shows that the source was in the hard state, and then it transited to a soft intermediate state. We study the correl…
The spectroscopic evolution of the symbiotic-like recurrent nova V407 Cygni during its 2010 outburst. I. The shock and its evolution
Shore, S. N.; Wahlgren, G. M.; Osborne, J. P. +7 more
Context. V407 Cyg was, before 2010 Mar., known only as a D-type symbiotic binary system in which the Mira variable has a pulsation period of approximately 750 days, one of the longest known. On 2010 Mar. 10, it was discovered in outburst, eventually reaching V < 8. This is the first recorded nova event for this system, but it closely resembles …
Dust formation in the ejecta of the type II-P supernova 2004dj
Balog, Z.; Kiss, L. L.; Vinkó, J. +3 more
Aims: Core-collapse supernovae (CC SNe), especially type II-Plateau ones, are thought to be important contributors to cosmic dust production. SN 2004dj, one of the closest and brightest SN since 1987A, offered a good opportunity to examine dust-formation processes. To find signs of newly formed dust, we analyze all available mid-infrared (MIR…