Search Publications
HIFI spectroscopy of low-level water transitions in M 82
Teyssier, D.; Harris, A. I.; van der Werf, P. P. +23 more
We present observations of the rotational ortho-water ground transition, the two lowest para-water transitions, and the ground transition of ionised ortho-water in the archetypal starburst galaxy M 82, performed with the HIFI instrument on the Herschel Space Observatory. These observations are the first detections of the para-H2O(1…
X-ray monitoring of classical novae in the central region of M 31. I. June 2006-March 2007
Della Valle, M.; Pietsch, W.; Haberl, F. +9 more
Context. Classical novae (CNe) have recently been reported to represent the major class of supersoft X-ray sources (SSSs) in the central region of our neighbour galaxy M 31.
Aims: We carried out a dedicated monitoring of the M 31 central region with XMM-Newton and Chandra in order to find SSS counterparts of CNe, determine the duration of the…
Magnetic field intensification: comparison of 3D MHD simulations with Hinode/SP results
Solanki, S. K.; Danilovic, S.; Schüssler, M.
Context. Recent spectro-polarimetric observations have provided detailed measurements of magnetic field, velocity and intensity during events of magnetic field intensification in the solar photosphere.
Aims: By comparing with synthetic observations derived from MHD simulations, we investigate the physical processes underlying the observations…
New ephemeris of the ADC source 2A 1822-371: a stable orbital-period derivative over 30 years
Papitto, A.; Di Salvo, T.; Burderi, L. +4 more
We report on a timing of the eclipse arrival times of the low mass X-ray binary and X-ray pulsar 2A 1822-371 performed using all available observations of the Proportional Counter Array on board the Rossi X-ray Timing Explorer, XMM-Newton pn, and Chandra. These observations span the years from 1996 to 2008. Combining these eclipse arrival time mea…
The multifrequency campaign on 3C 279 in January 2006
Burwitz, V.; Bremer, M.; Gurwell, M. +7 more
Context. The prominent blazar 3C 279 is known for its large-amplitude variability throughout the electromagnetic spectrum and its often γ-ray-dominated spectral energy distribution. However, the characterization of its broadband spectral variability still lacks a consistent picture, and the origin of its high-energy emission is still unclear.
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Methanol maps of low-mass protostellar systems. I. The Serpens molecular core
van Dishoeck, E. F.; Kristensen, L. E.; Hogerheijde, M. R. +4 more
Context. Methanol has a rich rotational spectrum providing a large number of transitions at sub-millimetre wavelengths from a range of energy levels in one single telescope setting, thus making it a good tracer of physical conditions in star-forming regions. Furthermore, it is formed exclusively on grain surfaces and is therefore a clean tracer of…
Gas in the protoplanetary disc of HD 169142: Herschel's view
Pinte, C.; Ménard, F.; Duchêne, G. +49 more
In an effort to simultaneously study the gas and dust components of the disc surrounding the young Herbig Ae star HD 169142, we present far-IR observations obtained with the PACS instrument onboard the Herschel Space Observatory. This work is part of the open time key program GASPS, which is aimed at studying the evolution of protoplanetary discs.…
Realistic model atmosphere and revised abundances of the coolest Ap star HD 101065
Shulyak, D.; Ryabchikova, T.; Kochukhov, O. +1 more
Aims: Among the known Ap stars, HD 101065 is probably one of the most interesting objects, demonstrating very rich spectra of rare-earth elements (REE). Strongly peculiar photometric parameters of this star can not be fully reproduced by any modern theoretical calculations, even those accounting for realistic chemistry of its atmosphere. In t…
Water in massive star-forming regions: HIFI observations of W3 IRS5
de Graauw, Th.; Liseau, R.; Braine, J. +59 more
We present Herschel observations of the water molecule in the massive star-forming region W3 IRS5. The o-H_217O 110-101, p-H_218O 111-000, p-H2O 202-111, p-H2O 111-000, o-H2O 221-212, …
The WIRCAM Deep Infrared Cluster Survey. I. Groups and clusters at z ⪆ 1.1
Finoguenov, A.; Daddi, E.; Ilbert, O. +12 more
Aims: We use a combination of CFHTLS deep optical data, WIRcam Deep Survey (WIRDS) near-infrared data and XMM-Newton survey data to identify z ⪆ 1.1 clusters in the CFHTLS D1 and D4 fields. Counterparts to such clusters can not be identified without deep near-infrared data and as such the total of ≈ 1 deg2 of J, H and Ks…