Search Publications
Globules and pillars in Cygnus X. I. Herschel far-infrared imaging of the Cygnus OB2 environment
Hill, T.; White, G. J.; André, Ph. +21 more
The radiative feedback of massive stars on molecular clouds creates pillars, globules and other features at the interface between the H II region and molecular cloud. Optical and near-infrared observations from the ground as well as with the Hubble or Spitzer satellites have revealed numerous examples of such cloud structures. We present here Hers…
Water and carbon dioxide distribution in the 67P/Churyumov-Gerasimenko coma from VIRTIS-M infrared observations
Erard, S.; Crovisier, J.; Piccioni, G. +14 more
Context. Studying the coma environment of comet 67P/Churyumov-Gerasimenko (67P) is one of the primary scientific goals of the VIRTIS experiment on the ESA Rosetta mission.
Aims: The distribution and variability of water vapour and carbon dioxide in the comet's coma are needed to estimate their production rate, abundances in the nucleus, and t…
Critical study of the distribution of rotational velocities of Be stars. I. Deconvolution methods, effects due to gravity darkening, macroturbulence, and binarity
Cidale, L.; Frémat, Y.; Royer, F. +9 more
Context. Among intermediate-mass and massive stars, Be stars are the fastest rotators in the main sequence (MS) and, as such, these stars are a cornerstone to validate models of structure and evolution of rotating stars. Several phenomena, however, induce under- or overestimations either of their apparent Vsini, or true velocity V.
Aims: In t…
CLASH-VLT: Environment-driven evolution of galaxies in the z = 0.209 cluster Abell 209
Demarco, R.; Moustakas, J.; Grillo, C. +19 more
Context. The analysis of galaxy properties, such as stellar masses, colors, sizes and morphologies, and the relations among them and the environment, in which the galaxies reside, can be used to investigate the physical processes driving galaxy evolution.
Aims: We conduct a thorough study of the cluster A209 with a new large spectro-photometr…
Planck intermediate results. XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +192 more
The quest for a B-mode imprint from primordial gravity waves on the polarization of the cosmic microwave background (CMB) requires the characterization of foreground polarization from Galactic dust. We present a statistical study of the filamentary structure of the 353 GHz Planck Stokes maps at high Galactic latitude, relevant to the study of dust…
Probing interstellar turbulence in cirrus with deep optical imaging: no sign of energy dissipation at 0.01 pc scale
Miville-Deschênes, M. -A.; Duc, P. -A.; Cuillandre, J. -C. +4 more
Diffuse Galactic light has been observed in the optical since the 1930s. We propose that, when observed in the optical with deep imaging surveys, it can be used as a tracer of the turbulent cascade in the diffuse interstellar medium (ISM), down to scales of about 1 arcsec. Here we present a power spectrum analysis of the dust column density of a d…
The Close AGN Reference Survey (CARS). What is causing Mrk 1018's return to the shadows after 30 years?
Combes, F.; Scharwächter, J.; Eckart, A. +11 more
We recently discovered that the active galactic nucleus (AGN) of Mrk 1018 has changed optical type again after 30 yr as a type 1 AGN. Here we combine Chandra, NuStar, Swift, Hubble Space Telescope and ground-based observations to explore the cause of this change. The 2-10 keV flux declines by a factor of ~8 between 2010 and 2016. We show with our …
The ATLASGAL survey: distribution of cold dust in the Galactic plane. Combination with Planck data
Menten, K. M.; Weiss, A.; Henning, Th. +9 more
Context. Sensitive ground-based submillimeter surveys, such as ATLASGAL, provide a global view on the distribution of cold dense gas in the Galactic plane at up to two-times better angular-resolution compared to recent space-based surveys with Herschel. However, a drawback of ground-based continuum observations is that they intrinsically filter em…
Understanding star formation in molecular clouds. III. Probability distribution functions of molecular lines in Cygnus X
Hill, T.; Schneider, N.; Ossenkopf, V. +11 more
The probability distribution function of column density (N-PDF) serves as a powerful tool to characterise the various physical processes that influence the structure of molecular clouds. Studies that use extinction maps or H2 column-density maps (N) that are derived from dust show that star-forming clouds can best be characterised by lo…
VISION - Vienna survey in Orion. I. VISTA Orion A Survey
Kainulainen, Jouni; Meingast, Stefan; Alves, João +17 more
Context. Orion A hosts the nearest massive star factory, thus offering a unique opportunity to resolve the processes connected with the formation of both low- and high-mass stars. Here we present the most detailed and sensitive near-infrared (NIR) observations of the entire molecular cloud to date.
Aims: With the unique combination of high im…