Search Publications
An optical spectroscopic survey of the 3CR sample of radio galaxies with z < 0.3. I. Presentation of the data
Macchetto, F. D.; Capetti, A.; Sparks, W. B. +4 more
We present a homogeneous and 92% complete dataset of optical nuclear spectra for the 113 3CR radio sources with redshifts <0.3, obtained with the Telescopio Nazionale Galileo. For these sources we could obtain uniform and uninterrupted coverage of the key spectroscopic optical diagnostics. The observed sample, including powerful classical FR II…
HD 50844: a new look at δ Scuti stars from CoRoT space photometry
Auvergne, M.; Amado, P. J.; Baudin, F. +21 more
Context:
Aims: This work presents the results obtained by CoRoT on HD 50844, the only δ Sct star observed in the CoRoT initial run (57.6 d). The aim of these CoRoT observations was to investigate and characterize for the first time the pulsational behaviour of a δ Sct star, when observed at a level of precision and with a much better duty cycl…
Radial distribution of the multiple stellar populations in ω Centauri
Anderson, J.; Milone, A. P.; Momany, Y. +4 more
Aims: We present a detailed study of the radial distribution of the multiple populations identified in the Galactic globular cluster ω Cen.
Methods: We used both space-based images (ACS/WFC and WFPC2) and ground-based images (FORS1@VLT and WFI@2.2m ESO telescopes) to map the cluster from the inner core to the outskirts ( 20 arcmin). These data…
Ground-based CCD astrometry with wide field imagers. III. WFI@2.2m proper-motion catalog of the globular cluster ω Centauri
Moretti, A.; Anderson, J.; Milone, A. P. +6 more
Context: ω Centauri is the most well studied Galactic Globular Cluster because of its numerous puzzling features: significant dispersion in metallicity, multiple populations, triple main-sequence, horizontal branch morphology, He-rich population(s), and extended star-formation history. Intensive spectroscopic follow-up observing campaigns targetin…
Strong [CII] emission at high redshift
Maiolino, R.; Meneghetti, M.; De Breuck, C. +3 more
We report the detection of the [Cii]157.74 µm fine-structure line in the lensed galaxy BRI 0952-0115 at z=4.43, using the APEX telescope. This is the first detection of the [Cii] line in a source with L_FIR < 1013~L_⊙ at high redshift. The line is much stronger than previous [Cii] detections at high-z (a factor of 5-8 higher in…
Suzaku measurement of Abell 2204's intracluster gas temperature profile out to 1800 kpc
Zhang, Y. -Y.; Ishisaki, Y.; Fujita, Y. +6 more
Context: Measurements of intracluster gas temperatures out to large radii, where much of the galaxy cluster mass resides, are important for using clusters for precision cosmology and for studies of cluster physics. Previous attempts to measure robust temperatures at cluster virial radii have failed.
Aims: The goal of this work is to measure th…
Evidence for nonlinear resonant mode coupling in the β Cephei star HD 180642 (V1449 Aquilae) from CoRoT photometry
Auvergne, M.; Michel, E.; Uytterhoeven, K. +8 more
Context: We present the CoRoT light curve of the β Cep star HD 180642, assembled during the first long run of the space mission, as well as archival single-band photometry.
Aims: Our goal is to analyse the detailed behaviour present in the light curve and interpret it in terms of excited-mode frequencies.
Methods: After describing the nois…
The normal Type Ia SN 2003hv out to very late phases
Sollerman, J.; Schmidt, B. P.; Fransson, C. +19 more
Aims: We study a thermonuclear supernova (SN), emphasizing very late phases.
Methods: An extensive dataset for SN 2003hv that covers the flux evolution from maximum light to day +786 is presented. This includes 82 epochs of optical imaging, 24 epochs of near-infrared (NIR) imaging, and 10 epochs of optical spectroscopy. These data are combined…
Hinode/EIS observations of propagating low-frequency slow magnetoacoustic waves in fan-like coronal loops
Wang, T. J.; Davila, J. M.; Mariska, J. T. +1 more
Aims: We report the first observation of multiple-periodic propagating disturbances along a fan-like coronal structure simultaneously detected in both intensity and Doppler shift in the Fe xii 195 Å line with the EUV Imaging Spectrometer (EIS) onboard Hinode. A new application of coronal seismology is provided based on this observation.
Method…
The B0.5IVe CoRoT target HD 49330. I. Photometric analysis from CoRoT data
Auvergne, M.; Baudin, F.; Michel, E. +19 more
Context: Be stars undergo outbursts producing a circumstellar disk from the ejected material. The beating of non-radial pulsations has been put forward as a possible mechanism of ejection.
Aims: We analyze the pulsational behavior of the early B0.5IVe star HD 49330 observed during the first CoRoT long run towards the Galactical anticenter (LRA…