Search Publications
White dwarf masses in intermediate polars observed with the Suzaku satellite
Yamada, S.; Makishima, K.; Ebisawa, K. +5 more
Context. White dwarfs (WDs) in cataclysmic variables (CVs) are important experimental laboratories where the electron degeneracy is taking place on a macroscopic scale. Magnetic CVs increase in number especially in the hard X-ray band (≳ 10 keV) thanks to sensitive hard X-ray missions.
Aims: From X-ray spectroscopy, we estimate the masses of …
Detection of hydrogen fluoride absorption in diffuse molecular clouds with Herschel/HIFI: an ubiquitous tracer of molecular gas
Menten, K. M.; Perault, M.; Boulanger, F. +47 more
We discuss the detection of absorption by interstellar hydrogen fluoride (HF) along the sight line to the submillimeter continuum sources W49N and W51. We have used Herschel's HIFI instrument in dual beam switch mode to observe the 1232.4762 GHz J = 1-0 HF transition in the upper sideband of the band 5a receiver. We detected foreground absorption …
Probing quiet Sun magnetism using MURaM simulations and Hinode/SP results: support for a local dynamo
Solanki, S. K.; Danilovic, S.; Schüssler, M.
Context. Owing to the limited spatial resolution and the weak polarization signal coming from the quietest regions on the Sun, the organization of the magnetic field on the smallest scales is largely unknown.
Aims: We obtain information about the magnetic flux present in the quiet Sun by comparing radiative MHD simulations with observations, …
Exploring the physical properties of local star-forming ULIRGs from the ultraviolet to the infrared
Elbaz, D.; Armus, L.; da Cunha, E. +3 more
We apply the da Cunha et al. (2008, MNRAS, 388, 1595) model of the spectral energy distribution (SEDs) of galaxies to a small pilot sample of purely star-forming ultra-luminous infrared galaxies (ULIRGs). We interpret the observed SEDs of 16 ULIRGs using this physically-motivated model that accounts for both the emission of stellar populations fro…
Distance determination for RAVE stars using stellar models . II. Most likely values assuming a standard stellar evolution scenario
Gilmore, G.; Freeman, K. C.; Munari, U. +23 more
The RAdial Velocity Experiment (RAVE) is a spectroscopic survey of the Milky Way which already collected over 400 000 spectra of ~ 330 000 different stars. We use the subsample of spectra with spectroscopically determined values of stellar parameters to determine the distances to these stars. The list currently contains 235 064 high quality spectr…
Strong absorption by interstellar hydrogen fluoride: Herschel/HIFI observations of the sight-line to G10.6-0.4 (W31C)
Menten, K. M.; Perault, M.; Boulanger, F. +45 more
We report the detection of strong absorption by interstellar hydrogen fluoride along the sight-line to the submillimeter continuum source G10.6-0.4 (W31C). We have used Herschel's HIFI instrument, in dual beam switch mode, to observe the 1232.4763 GHz J = 1-0 HF transition in the upper sideband of the Band 5a receiver. The resultant spectrum shows…
Mapping the column density and dust temperature structure of IRDCs with Herschel
Bernard, J. -P.; Montier, L.; Ristorcelli, I. +22 more
Infrared dark clouds (IRDCs) are cold and dense reservoirs of gas potentially available to form stars. Many of these clouds are likely to be pristine structures representing the initial conditions for star formation. The study presented here aims to construct and analyze accurate column density and dust temperature maps of IRDCs by using the first…
Cluster galaxies in XMMU J2235-2557: galaxy population properties in most massive environments at z ~ 1.4
Böhringer, H.; Demarco, R.; Pannella, M. +18 more
We present a multi-wavelength study of galaxy populations in the core of the massive, X-ray luminous cluster XMMU J2235 at z=1.39, based on high quality VLT and HST photometry at optical and near-infrared wavelengths. We derive luminosity functions in the z, H, and Ks bands, approximately corresponding to restframe U, R and z band. Thes…
Herschel/HIFI discovery of interstellar chloronium (H2Cl+)
Menten, K. M.; Falgarone, E.; Martin, P. G. +102 more
We report the first detection of chloronium, H2Cl+, in the interstellar medium, using the HIFI instrument aboard the Herschel Space Observatory. The 212-101 lines of ortho-H_235Cl+ and ortho-H_237Cl+ are detected in absorption towards NGC 6334I, and the 11…
Mapping the 12CO J = 1-0 and J = 2-1 emission in AGB and early post-AGB circumstellar envelopes. I. The COSAS program, first sample
Lindqvist, M.; Olofsson, H.; Grewing, M. +8 more
We present COSAS (CO Survey of late AGB Stars), a project to map and analyze the 12CO J = 1-0 and J = 2-1 line emission in a representative sample of circumstellar envelopes around AGB and post-AGB stars. The survey was undertaken with the aim of investigating small- and large-scale morphological and kinematical properties of the molecu…