Search Publications
Kinematic signature of an intermediate-mass black hole in the globular cluster NGC 6388
Kissler-Patig, M.; de Zeeuw, P. T.; Lützgendorf, N. +4 more
Context. Intermediate-mass black holes (IMBHs) are of interest in a wide range of astrophysical fields. In particular, the possibility of finding them at the centers of globular clusters has recently drawn attention. IMBHs became detectable since the quality of observational data sets, particularly those obtained with HST and with high resolution …
Accurate p-mode measurements of the G0V metal-rich CoRoT target HD 52265
Auvergne, M.; Baudin, F.; García, R. A. +27 more
Context. The star
Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +201 more
We perform a detailed investigation of sources from the Cold Cores Catalogue of Planck Objects (C3PO). Our goal is to probe the reliability of the detections, validate the separation between warm and cold dust emission components, provide the first glimpse at the nature, internal morphology and physical characterictics of the Planck-detected sourc…
Hubble flow around Fornax cluster of galaxies
Karachentsev, I. D.; de Freitas Pacheco, J. A.; Nasonova, O. G.
Aims: This work aims to provide a new mass estimate for the Fornax cluster and the Fornax-Eridanus complex, avoiding methods like the virial or fits of the X-ray emission profile, which assume that the system is in equilibrium. This is probably not the case for Fornax, because it is still in process of formation.
Methods: Our mass estima…
Planck early results. II. The thermal performance of Planck
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +229 more
The performance of the Planck instruments in space is enabled by their low operating temperatures, 20 K for LFI and 0.1 K for HFI, achieved through a combination of passive radiative cooling and three active mechanical coolers. The scientific requirement for very broad frequency coverage led to two detector technologies with widely different tempe…
Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs
Quirrenbach, A.; Reffert, S.
Context. The recently completed re-reduction of the Hipparcos data by van Leeuwen (2007a, Astrophysics and Space Science Library, 350) makes it possible to search for the astrometric signatures of planets and brown dwarfs known from radial velocity surveys in the improved Hipparcos intermediate astrometric data.
Aims: Our aim is to put more s…
The complex circumstellar environment of HD 142527
Waters, L. B. F. M.; Pantin, E.; Dominik, C. +10 more
Context. The recent findings of gas giant planets around young A-type stars suggest that disks surrounding Herbig Ae/Be stars will develop planetary systems. An interesting case is HD 142527, for which previous observations revealed a complex circumstellar environment and an unusually high ratio of infrared to stellar luminosity. Its properties di…
Study of LINER sources with broad Hα emission. X-ray properties and comparison to luminous AGN and X-ray binaries
Porquet, D.; Reeves, J. N.; Younes, G. +1 more
Context. An important number of multiwavelength studies of low ionization nuclear emission-line regions (LINERs) were dedicated to investigate the excitation mechanism responsible for the detected emission lines. Radiative emission from accretion into a super massive black hole (SMBH) is now believed to be, in an increasing number of LINERs, the s…
Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. I. Measurements, methods, and first results
Grundahl, F.; Bedin, L. R.; Brogaard, K. +4 more
Context. Models of stellar structure and evolution can be constrained by measuring accurate parameters of detached eclipsing binaries in open clusters. Multiple binary stars provide the means to determine helium abundances in these old stellar systems, and in turn, to improve age estimates.
Aims: Earlier measurements of the masses and radii o…
The Herschel view of massive star formation in G035.39-00.33: dense and cold filament of W48 undergoing a mini-starburst
Martin, P. G.; Hill, T.; White, G. J. +29 more
The filament IRDC G035.39-00.33 in the W48 molecular complex is one of the darkest infrared clouds observed by Spitzer. It has been observed by the PACS (70 and 160 µm) and SPIRE (250, 350, and 500 µm) cameras of the Herschel Space Observatory as part of the W48 molecular cloud complex in the framework of the HOBYS key programme. The o…