Search Publications
Gomez's Hamburger (IRAS 18059-3211): a pre main-sequence A-type star
Bujarrabal, V.; Young, K.; Fong, D.
Aims: We study the nature of Gomez's Hamburger (IRAS 18059-3211; GoHam), a nebula that has been proposed to be a post-AGB object. Such a classification has not been confirmed; instead, we argue that it will be a key object in the study of disks rotating around young stars.
Methods: We present high-resolution SMA maps of CO J = 2-1 in Gomez's H…
Modeling magnetohydrodynamics and non-equilibrium SoHO/UVCS line emission of CME shocks
Raymond, J. C.; Orlando, S.; Reale, F. +1 more
Aims: We provide a guideline to interpret the UltraViolet Coronograph Spectrometer (UVCS) emission lines (in particular O VI and Si XII) during shock wave propagation in the outer solar corona.
Methods: We use a numerical magnetohydrodynamic (MHD) model performing a set of simulations of shock waves generated in the corona and from the result …
Detecting transits from Earth-sized planets around Sun-like stars
Fridlund, M.; Carpano, S.
Context: Detecting regular dips in the light curve of a star is an easy way to detect the presence of an orbiting planet. CoRoT is a Franco-European mission launched at the end of 2006, and one of its main objectives is to detect planetary systems using the transit method.
Aims: In this paper, we present a new method for transit detection and …
Asteroid 2867 Steins. I. Photometric properties from OSIRIS/Rosetta and ground-based visible observations
Jorda, L.; Lamy, P. L.; Barucci, M. A. +6 more
Context: Asteroid 2867 Steins is the first target of the Rosetta space mission with a flyby scheduled in September 2008.
Aims: An early characterization is needed to optimize the flyby parameters and the science operations and to maximize the scientific return. The aim of this article is to characterize the photometric properties of this aster…
Statistics of young starforming complexes in spiral galaxies using NIR photometry
Dottori, H.; Grosbøl, P.
Aims: Very young stellar clusters and cluster complexes may be embedded in dust lanes along spiral arms in disk galaxies and escape detection in visual bands. Observations in the near-infrared K-band offer an almost unbiased view of such clusters or complexes due to the small attenuation by dust at this wavelength. The objective is to determine th…
The Hubble Legacy Archive NICMOS grism data
Kümmel, M.; Haase, J.; Kuntschner, H. +6 more
The Hubble Legacy Archive (HLA) aims to create calibrated science data from the Hubble Space Telescope archive and make them accessible via user-friendly and Virtual Observatory (VO) compatible interfaces. It is a collaboration between the Space Telescope Science Institute (STScI), the Canadian Astronomy Data Centre (CADC) and the Space Telescope …
XMM-Newton studies of a massive cluster of galaxies: RXC J2228.6+2036
Böhringer, H.; Pointecouteau, E.; Chen, Y. +2 more
We present the X-ray properties of a massive cluster of galaxies (RXC J2228.6+2036 at z = 0.421) using XMM-Newton data. The X-ray mass modeling is based on the temperature and density distributions of the intracluster medium derived using a deprojection method. We find that RXC J2228.6+2036 is a hot cluster (T500=8.92^+1.78-1.32
On the relation between DC current locations and an EUV bright point: A case study
Madjarska, M. S.; Büchner, J.; Santos, J. C. +1 more
Context: Motion of the photospheric plasma forces the footpoints of magnetic flux tubes to move. This can give rise to electric currents in the solar atmosphere. The dissipation of these electric currents and the consequent heating of the solar plasma may be responsible for the formation of Extreme-UltraViolet (EUV) and X-ray bright points. Earlie…
Broadband imaging and narrowband polarimetry of comet 73P/Schwassmann-Wachmann 3, components B and C, on 3, 4, 8, and 9 May 2006
Boehnhardt, H.; Borisov, G.; Bonev, T.
Context: The Jupiter family comet 73P/Schwassmann-Wachmann 3 (SW3) split into several pieces in 1995. Some of the original fragments were observed during the next apparition of the comet in 1999-2001. The last return of the comet in 2005-2006 was accompanied by tremendous further splitting of some SW3 components - in particular component B - into …
Bulges of disk galaxies at intermediate redshifts. I. Samples with and without bulges in the Groth Strip survey
Cristóbal-Hornillos, D.; Guzmán, R.; Balcells, M. +4 more
Context: Analysis of bulges to redshifts of up to z ∼ 1 have provided ambiguous results as to whether bulges as a class are old structures akin to elliptical galaxies or younger products of the evolution of their host disks.
Aims: We aim to define a sample of intermediate-z disk galaxies harbouring central bulges, and a complementary sample of…