Search Publications
OH far-infrared emission from low- and intermediate-mass protostars surveyed with Herschel-PACS
van Dishoeck, E. F.; Larsson, B.; Goicoechea, J. R. +10 more
Context. The OH radical is a key species in the water chemistry network of star-forming regions, because its presence is tightly related to the formation and destruction of water. Previous studies of the OH far-infrared emission from low- and intermediate-mass protostars suggest that the OH emission mainly originates from shocked gas and not from …
Herschel far-infrared observations of the Carina Nebula complex. II. The embedded young stellar and protostellar population
Preibisch, T.; Zinnecker, H.; Roccatagliata, V. +3 more
Context. The Carina Nebula represents one of the largest and most active star forming regions known in our Galaxy. It contains numerous very massive (M ≳ 40 M⊙) stars that strongly affect the surrounding clouds by their ionizing radiation and stellar winds.
Aims: Our recently obtained Herschel PACS and SPIRE far-infrared maps cover…
Herschel-HIFI observations of high-J CO and isotopologues in star-forming regions: from low to high mass
Braine, J.; van Dishoeck, E. F.; Johnstone, D. +9 more
Context. Our understanding of the star formation process has traditionally been confined to certain mass or luminosity boundaries because most studies focus only on low-, intermediate-, or high-mass star-forming regions. Therefore, the processes that regulate the formation of these different objects have not been effectively linked. As part of the…
Vertical broad-line region structure in nearby active galactic nuclei
Kollatschny, W.; Zetzl, M.
Context. Broad emission lines are emitted in the surroundings of supermassive black holes in the centers of active galactic nuclei (AGN). This region is spatially not resolved.
Aims: We intend to get information on the structure and geometry of this broad emitting line region based on line profile observations.
Methods: We model the rota…
Large-scale environments of binary AGB stars probed by Herschel. I. Morphology statistics and case studies of R Aquarii and W Aquilae
Blommaert, J. A. D. L.; Jorissen, A.; Ottensamer, R. +14 more
The Mass loss of Evolved StarS (MESS) sample offers a selection of 78 asymptotic giant branch (AGB) stars and red supergiants (RSGs) observed with the PACS photometer on-board Herschel at 70 µm and 160 µm. For most of these objects, the dusty AGB wind is not spherically symmetric and the wind shape can be subdivided into four classes. …
An analysis of star formation with Herschel in the Hi-GAL survey. I. The science demonstration phase fields
Paladini, R.; Piacentini, F.; Elia, D. +8 more
Aims: The Herschel survey of the Galactic plane (Hi-GAL) provides a unique opportunity to study star formation over large areas of the sky and different environments in the Milky Way. We use the best-studied Hi-GAL fields to date, two 2°·2° tiles centered on (ℓ, b) = (30°, 0°) and (ℓ, b) = (59°, 0°), to study the star formation activity in th…
Far-infrared-detected Lyman-break galaxies at z ~ 3. Dust attenuation and dust correction factors at high redshift
Cepa, J.; Oteo, I.; Ederoclite, A. +7 more
Lyman-break galaxies (LBGs) represent one of the kinds of star-forming galaxies that are found in the high-redshift universe. The detection of LBGs in the far-infrared (FIR) domain can provide very important clues on their dust attenuation and total star-formation rate (SFR), allowing a more detailed study than has been performed so far. In this w…
Discovery of a magnetic field in the CoRoT hybrid B-type pulsator HD 43317
Neiner, C.; Briquet, M.; Pápics, P. I. +2 more
Context. A promising way of testing the impact of a magnetic field on internal mixing (core overshooting, internal rotation) in main-sequence B-type stars is to perform asteroseismic studies of a sample of magnetic pulsators.
Aims: The CoRoT satellite revealed that the B3IV star HD 43317 is a hybrid SPB/β Cep-type pulsator that has a wealth o…
RX J0440.9 + 4431: a persistent Be/X-ray binary in outburst
Klochkov, D.; Ferrigno, C.; Bozzo, E. +3 more
The persistent Be/X-ray binary
Observing extended sources with the Herschel SPIRE Fourier Transform Spectrometer
Valtchanov, I.; Wu, R.; Hopwood, R. +20 more
The Spectral and Photometric Imaging Receiver (SPIRE) on the European Space Agency's Herschel Space Observatory utilizes a pioneering design for its imaging spectrometer in the form of a Fourier Transform Spectrometer (FTS). The standard FTS data reduction and calibration schemes are aimed at objects with either a spatial extent that is much large…