Search Publications
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.…
Planck 2013 results. VII. HFI time response and beams
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +220 more
This paper characterizes the effective beams, the effective beam window functions and the associated errors for the Planck High Frequency Instrument (HFI) detectors. The effective beam is theangular response including the effect of the optics, detectors, data processing and the scan strategy. The window function is the representation of this beam …
Thermal desorption of circumstellar and cometary ice analogs
Martín-Doménech, R.; Muñoz Caro, G. M.; Bueno, J. +1 more
Context. Thermal annealing of interstellar ices takes place in several stages of star formation. Knowledge of this process comes from a combination of astronomical observations and laboratory simulations under astrophysically relevant conditions.
Aims: For the first time we present the results of temperature programmed desorption (TPD) experi…
The VLT-FLAMES Tarantula Survey. XIV. The O-type stellar content of 30 Doradus
Lennon, D. J.; Simón-Díaz, S.; de Koter, A. +6 more
Detailed spectral classifications are presented for 352 O-B0 stars in the VLT-FLAMES Tarantula Survey ESO Large Programme, of which 213 O-type are judged of sufficiently high quality for further morphological analysis. Among them, six subcategories of special interest are distinguished. (1) Several new examples of the earliest spectral types O2-O3…