Search Publications
Estimating distance, pressure, and dust opacity using submillimeter observations of self-gravitating filaments
Martin, P. G.; Fischera, J.
We present a detailed study of the surface brightness profiles of dense filaments in
Astrometric confirmation of young low-mass binaries and multiple systems in the Chamaeleon star-forming regions
Neuhäuser, R.; Schmidt, T. O. B.; Mugrauer, M. +4 more
Context. The star-forming regions in Chamaeleon (Cha) are one of the nearest (distance ~ 165 pc) and youngest (age ~ 2 Myr) conglomerates of recently formed stars and the ideal target for population studies of star formation.
Aims: We investigate a total of 16 Cha targets that have been suggested, but not confirmed, to be binaries or multiple…
η Carinae: linelist for the emission spectrum of the Weigelt blobs in the 1700 to 10 400 Å wavelength region
Gull, T. R.; Johansson, S.; Hartman, H. +1 more
Aims: We present line identifications in the 1700 to 10 400 Å region for the Weigelt blobs B and D, located 0″.1 to 0″.3 NNW of
The abundance of C18O and HDO in the envelope and hot core of the intermediate mass protostar NGC 7129 FIRS 2
Cernicharo, J.; Johnstone, D.; Fuente, A. +11 more
Context. NGC 7129 FIRS 2 is a young intermediate-mass (IM) protostar, which is associated with two energetic bipolar outflows and displays clear signs of the presence of a hot core. It has been extensively observed with ground based telescopes and within the WISH guaranteed time Herschel key program.
Aims: This paper is dedicated to the model…
Dynamo regime transition among Sun-like stars in M 34. A time evolution model of X-ray activity on the main sequence
Gondoin, P.
Context. The X-ray emission from late-type stars in open clusters exhibits two kinds of dependences on stellar rotation. While fast rotators have a relatively constant X-ray emission level, slower rotators show a decline of their X-ray emission with decreasing rotation rate. The physical significance of the transition between these two X-ray emiss…
The VLT/VISIR mid-IR view of 47 Tucanae. A further step in solving the puzzle of RGB mass loss
Bayo, A.; Milone, A. P.; Bressan, A. +5 more
There is an ongoing debate regarding the onset luminosity of dusty mass loss in population-II red giant stars. We present VLT/VISIR mid-infrared (MIR) 8.6 µm imaging of 47 Tuc, the centre of attention of a number of space-based Spitzer observations and studies. The VISIR high-resolution (diffraction limited) observations allow excellent matc…
Transiting exoplanets from the CoRoT space mission. XXIII. CoRoT-21b: a doomed large Jupiter around a faint subgiant star
Mazeh, T.; Aigrain, S.; Alonso, R. +45 more
CoRoT-21, a F8IV star of magnitude V = 16 mag, was observed by the space telescope CoRoT during the Long Run 01 (LRa01) in the first winter field (constellation Monoceros) from October 2007 to March 2008. Transits were discovered during the light curve processing. Radial velocity follow-up observations, however, were performed mainly by the 10-m K…
Spectrally resolved C II emission in M 33 (HerM33es). Physical conditions and kinematics around BCLMP 691
Boquien, M.; Braine, J.; van der Werf, P. +7 more
This work presents high spectral resolution observations of the [C ii] line at 158 µm, one of the major cooling lines of the interstellar medium, taken with the HIFI heterodyne spectrometer on the Herschel satellite. In BCLMP 691, an H ii region far north (3.3 kpc) in the disk of M 33, the [C ii] and CO line profiles show similar velocities …
Radiative equilibrium in solar prominences reconsidered
Heinzel, P.; Anzer, U.
Aims: We reconsider the question which kinetic temperatures can lead to prominence configurations that are in radiative equilibrium. We compare these temperatures to those from other calculations.
Methods: For this purpose we solved the full non-LTE radiative-transfer problem for a gas consisting of hydrogen, helium and calcium. We used …
A detailed X-ray investigation of ζ Puppis. I. The dataset and some preliminary results
Nazé, Y.; Rauw, G.; Flores, C. A.
Aims: One of the closest and brightest massive stars, ζ Puppis, was the first early-type object observed by the current generation of X-ray observatories. These observations provided some surprising results, partly confirming the theoretical predictions while simultaneously unveiling some problematic mismatches with expectations. In this seri…