Search Publications
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE). IV. A tail of ionised gas in the merger remnant NGC4424
Ferrarese, L.; Buat, V.; Boquien, M. +31 more
We observed the late-type peculiar galaxy NGC 4424 during the Virgo Environmental Survey Tracing Galaxy Evolution (VESTIGE), a blind narrow-band Hα+[NII] imaging survey of the Virgo cluster carried out with MegaCam at the Canada-French-Hawaii Telescope (CFHT). The presence of a ∼110 kpc (in projected distance) HI tail in the southern direction ind…
Detection of the Milky Way spiral arms in dust from 3D mapping
Hogg, David W.; Bailer-Jones, Coryn A. L.; Rezaei Kh., Sara +1 more
Large stellar surveys are sensitive to interstellar dust through the effects of reddening. Using extinctions measured from photometry and spectroscopy, together with three-dimensional (3D) positions of individual stars, it is possible to construct a three-dimensional dust map. We present the first continuous map of the dust distribution in the Gal…
Resolving the hydrostatic mass profiles of galaxy clusters at z ∼ 1 with XMM-Newton and Chandra
Arnaud, M.; Pratt, G. W.; Bartalucci, I. +1 more
We present a detailed study of the integrated total hydrostatic mass profiles of the five most massive M500SZ < 5 × 1014 M⊙ galaxy clusters selected at z ∼ 1 via the Sunyaev-Zel'dovich effect. These objects represent an ideal laboratory to test structure formation models where the primary driver is gr…
The X-ray catalog of spectroscopically identified Galactic O stars. Investigating the dependence of X-ray luminosity on stellar and wind parameters
Oskinova, L. M.; Nebot Gómez-Morán, A.
The X-ray emission of O-type stars was first discovered in the early days of the Einstein satellite. Since then many different surveys have confirmed that the ratio of X-ray to bolometric luminosity in O-type stars is roughly constant, but there is a paucity of studies that account for detailed information on spectral and wind properties of O-star…
Milky Way metallicity gradient from Gaia DR2 F/1O double-mode Cepheids
Kovtyukh, V.; Lemasle, B.; Kniazev, A. +8 more
Context. The ratio of the first overtone (1O)/fundamental (F) periods of mixed-mode Cepheids that pulsate simultaneously in these two modes (F/1O) is metallicity-dependent. It can therefore be used to characterize the systems that host such variable stars.
Aims: We want to take advantage of the F/1O double-mode Cepheids listed in the Gaia Dat…
The Gaia-ESO Survey: Churning through the Milky Way
Gilmore, G.; Bayo, A.; Recio-Blanco, A. +29 more
Context. There have been conflicting results with respect to the extent that radial migration has played in the evolution of the Galaxy. Additionally, observations of the solar neighborhood have shown evidence of a merger in the past history of the Milky Way that drives enhanced radial migration.
Aims: We attempt to determine the relative fra…
Asteroid models reconstructed from the Lowell Photometric Database and WISE data
Alí-Lagoa, V.; Hanuš, J.; Ďurech, J.
Context. Information about the spin state of asteroids is important for our understanding of the dynamical processes affecting them. However, spin properties of asteroids are known for only a small fraction of the whole population.
Aims: To enlarge the sample of asteroids with a known rotation state and basic shape properties, we combined spa…
Constraining physical conditions for the PDR of Trumpler 14 in the Carina Nebula
Onaka, Takashi; Okada, Yoko; Le Petit, Franck +5 more
We investigate the physical conditions of the CO gas, based on the submillimeter imaging spectroscopy from a 2' × 7' (1.5 × 5 pc2) area near the young star cluster, Trumpler 14 of the Carina Nebula. The observations presented in this work are taken with the Fourier Transform Spectrometer (FTS) of the Spectral and Photometric Imaging REc…
Exploring the space density of X-ray selected cataclysmic variables
Schwope, A. D.
The space density of the various classes of cataclysmic variables (CVs) has up to now only been weakly constrained, due to the small number of objects in complete X-ray flux-limited samples and the difficulty in deriving precise distances to CVs. The former limitation still exists. Here the impact of Gaia parallaxes and implied distances on the sp…
Fundamental properties of red-clump stars from long-baseline H-band interferometry
Kervella, P.; Villanova, S.; Mérand, A. +7 more
Observations of 48 red-clump stars were obtained in the H band with the PIONIER instrument installed at the Very Large Telescope Interferometer. Limb-darkened angular diameters were measured by fitting radial intensity profile I(r) to square visibility measurements. Half the angular diameters determined have formal errors better than 1.2%, while t…