Search Publications
Ubiquitous argonium (ArH+) in the diffuse interstellar medium: A molecular tracer of almost purely atomic gas
Menten, K. M.; Falgarone, E.; Godard, B. +14 more
Aims: We describe the assignment of a previously unidentified interstellar absorption line to ArH+ and discuss its relevance in the context of hydride absorption in diffuse gas with a low H2 fraction. The confidence of the assignment to ArH+ is discussed, and the column densities are determined toward several …
Indications for an influence of hot Jupiters on the rotation and activity of their host stars
Poppenhaeger, K.; Wolk, S. J.
Context. The magnetic activity of planet-hosting stars is an important factor for estimating the atmospheric stability of close-in exoplanets and the age of their host stars. It has long been speculated that close-in exoplanets can influence the stellar activity level. However, testing for tidal or magnetic interaction effects in samples of planet…
ALMA resolves turbulent, rotating [CII] emission in a young starburst galaxy at z = 4.8
Smail, Ian; Maiolino, Roberto; Caselli, Paola +9 more
We present spatially resolved Atacama Large Millimeter/submillimeter Array (ALMA) [Cii] observations of the z = 4.7555 submillimetre galaxy, ALESS 73.1. Our 0.̋5 FWHM map resolves the [Cii] emitting gas which is centred close to the active galactic nucleus (AGN). The gas kinematics are dominated by rotation but with high turbulence, vrot…
Planck 2013 results. VI. High Frequency Instrument data processing
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +240 more
Wedescribe the processing of the 531 billion raw data samples from the High Frequency Instrument (HFI), which we performed to produce six temperature maps from the first 473 days of Planck-HFI survey data. These maps provide an accurate rendition of the sky emission at 100, 143, 217, 353, 545, and 857GHz with an angular resolution ranging from 9.´…
GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts
Wuyts, E.; Cenko, S. B.; Covino, S. +62 more
Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (Liso ≲ 1048.5 erg s-1) than the average of more distant ones (Liso ≳ 1049.5 erg s-1). It has been suggested that the properties of several low-luminosi…
The VLT-FLAMES Tarantula Survey. XVI. The optical and NIR extinction laws in 30 Doradus and the photometric determination of the effective temperatures of OB stars
van Loon, J. Th.; Crowther, P. A.; Herrero, A. +11 more
Context. The commonly used extinction laws of Cardelli et al. (1989, ApJ, 345, 245) have limitations that, among other issues, hamper the determination of the effective temperatures of O and early B stars from optical and near-infrared (NIR) photometry.
Aims: We aim to develop a new family of extinction laws for 30 Doradus, check their genera…
A Herschel [C II] Galactic plane survey. III. [C II] as a tracer of star formation
Goldsmith, P. F.; Langer, W. D.; Pineda, J. L.
Context. The [C ii] 158 µm line is the brightest far-infrared cooling line in galaxies, representing 0.1 to 1% of their far-infrared continuum emission, and is therefore a potentially powerful tracer of star formation activity. The [C ii] line traces different phases of the interstellar medium (ISM), including the diffuse ionized medium, war…
The Hawk-I UDS and GOODS Survey (HUGS): Survey design and deep K-band number counts
Wuyts, S.; Daddi, E.; Chary, R. -R. +40 more
We present the results of a new, ultra-deep, near-infrared imaging survey executed with the Hawk-I imager at the ESO VLT, of which we make all the data (images and catalog) public. This survey, named HUGS (Hawk-I UDS and GOODS Survey), provides deep, high-quality imaging in the K and Y bands over the portions of the UKIDSS UDS and GOODS-South fiel…
A remarkable recurrent nova in M 31: The optical observations
Ness, J. -U.; Henze, M.; Shafter, A. W. +5 more
Context. In late Nov. 2013 the fifth eruption in five years of the M 31 recurrent nova M 31N 2008-12a was announced.
Aims: In this Letter we address the optical lightcurve and progenitor system of M 31N 2008-12a.
Methods: Optical imaging data of the 2013 eruption from the Liverpool Telescope, La Palma; Danish 1.54 m Telescope, La Silla; …
The molecular gas reservoir of 6 low-metallicity galaxies from the Herschel Dwarf Galaxy Survey. A ground-based follow-up survey of CO(1-0), CO(2-1), and CO(3-2)
Lebouteiller, V.; Madden, S. C.; Galliano, F. +14 more
Context. Observations of nearby starburst and spiral galaxies have revealed that molecular gas is the driver of star formation. However, some nearby low-metallicity dwarf galaxies are actively forming stars, but CO, the most common tracer of this reservoir, is faint, leaving us with a puzzle about how star formation proceeds in these environments.…