Search Publications
First CoRoT light curves of RR Lyrae stars. Complex multiplet structure and non-radial pulsation detections in V1127 Aquilae
Auvergne, M.; Poretti, E.; Baglin, A. +14 more
Context. The CoRoT - Convection Rotation and planetary Transits - space mission is a great opportunity for monitoring stars with excellent time-sampling and unprecedented photometric precision for up to 150 days. As an important benefit, high-quality RR Lyrae light curves are obtained with a quasi-uninterrupted coverage over several pulsation and …
PACS and SPIRE photometer maps of M 33: First results of the HERschel M 33 Extended Survey (HERM33ES)
Boquien, M.; Braine, J.; Beck, R. +37 more
Context. Within the framework of the HERM33ES key program, we are studying the star forming interstellar medium in the nearby, metal-poor spiral galaxy M 33, exploiting the high resolution and sensitivity of Herschel.
Aims: We use PACS and SPIRE maps at 100, 160, 250, 350, and 500 µm wavelength, to study the variation of the spectral en…
Seyfert 2 galaxies in the GeV band: jets and starburst
Walter, R.; Ricci, C.; Dorner, D. +2 more
Context. The Fermi/LAT collaboration recently reported the detection of starburt galaxies in the high energy Γ-ray domain, as well as radio-loud narrow-line Seyfert 1 objects.
Aims: Motivated by the presence of sources close to the location of composite starburst/Seyfert 2 galaxies in the first year Fermi/LAT catalogue, we aim at studying hig…
INTEGRAL hard X-ray spectra of the cosmic X-ray background and Galactic ridge emission
Walter, R.; Produit, N.; Courvoisier, T. J. -L. +4 more
Aims: We derive the spectra of the cosmic X-ray background (CXB) and of the Galactic ridge X-ray emission (GRXE) in the ~20-200 keV range from the data of the IBIS instrument aboard the INTEGRAL satellite obtained during the four dedicated Earth-occultation observations in early 2006.
Methods: We analyze the modulation of the IBIS/ISGRI …
Water content and wind acceleration in the envelope around the oxygen-rich AGB star IK Tauri as seen by Herschel/HIFI
Waters, L. B. F. M.; Olofsson, H.; Marston, A. P. +25 more
During their asymptotic giant branch evolution, low-mass stars lose a significant fraction of their mass through an intense wind, enriching the interstellar medium with products of nucleosynthesis. We observed the nearby oxygen-rich asymptotic giant branch star IK Tau using the high-resolution HIFI spectrometer onboard Herschel. We report on the f…
Coronal hole boundaries evolution at small scales. II. XRT view. Can small-scale outflows at CHBs be a source of the slow solar wind
Doyle, J. G.; Madjarska, M. S.; Subramanian, S.
Aims: We aim to further explore the small-scale evolution of coronal hole boundaries using X-ray high-resolution and high-cadence images. We intend to determine the fine structure and dynamics of the events causing changes of coronal hole boundaries and to explore the possibility that these events are the source of the slow solar wind.
M…
HerMES: Halo occupation number and bias properties of dusty galaxies from angular clustering measurements
Aussel, H.; Elbaz, D.; Valtchanov, I. +75 more
We measure the angular correlation function, w(θ), from 0.5 to 30 arcmin of detected sources in two wide fields of the Herschel Multi-tiered Extragalactic Survey (HerMES). Our measurements are consistent with the expected clustering shape from a population of sources that trace the dark matter density field, including non-linear clustering at arcm…
A high-resolution line survey of IRC +10216 with Herschel/HIFI. First results: Detection of warm silicon dicarbide (SiC{_2})
Waters, L. B. F. M.; Liseau, R.; Teyssier, D. +24 more
We present the first results of a high-spectral-resolution survey of the carbon-rich evolved star IRC+10216 that was carried out with the HIFI spectrometer onboard Herschel. This survey covers all HIFI bands, with a spectral range from 488 to 1901 GHz. In this letter we focus on the band-1b spectrum, in a spectral range 554.5-636.5 GHz, where we i…
PEP: First Herschel probe of dusty galaxy evolution up to z ~ 3
Berta, S.; Magnelli, B.; Nordon, R. +32 more
Aims: We exploit the deepest existing far-infrared (FIR) data obtained so far by Herschel at 100 and 160 µm in the GOODS-N, as part of the PACS evolutionary probe (PEP) survey, to derive for the first time the evolution of the rest-frame 60-µm, 90-µm, and total IR luminosity functions (LFs) of galaxies and AGNs from z = 0 to…
Cold DUst around NEarby Stars (DUNES). First results. A resolved exo-Kuiper belt around the solar-like star ζ2 Ret
Heras, A. M.; Fridlund, M.; Olofsson, G. +46 more
We present the first far-IR observations of the solar-type stars δ Pav, HR 8501, 51 Peg and ζ2 Ret, taken within the context of the DUNES Herschel open time key programme (OTKP). This project uses the PACS and SPIRE instruments with the objective of studying infrared excesses due to exo-Kuiper belts around nearby solar-type stars. The o…