Search Publications
``TNOs are cool'': A survey of the trans-Neptunian region. II. The thermal lightcurve of (136108) Haumea
Jorda, L.; Fornasier, S.; Groussin, O. +33 more
Thermal emission from Kuiper belt object (136108) Haumea was measured with Herschel-PACS at 100 µm and 160 µm for almost a full rotation period. Observations clearly indicate a 100 µm thermal lightcurve with an amplitude of a factor of ~2, which is positively correlated with the optical lightcurve. This confirms that both are pri…
Detection of frequency spacings in the young O-type binary HD 46149 from CoRoT photometry
Auvergne, M.; Baudin, F.; Poretti, E. +15 more
Aims: Using the CoRoT space based photometry of the O-type binary HD 46149, stellar atmospheric effects related to rotation can be separated from pulsations, because they leave distinct signatures in the light curve. This offers the possibility of characterising and exploiting any pulsations seismologically.
Methods: Combining high-quali…
Transiting exoplanets from the CoRoT space mission. XI. CoRoT-8b: a hot and dense sub-Saturn around a K1 dwarf
Mazeh, T.; Guterman, P.; Aigrain, S. +47 more
Aims: We report the discovery of CoRoT-8b, a dense small Saturn-class exoplanet that orbits a K1 dwarf in 6.2 days, and we derive its orbital parameters, mass, and radius.
Methods: We analyzed two complementary data sets: the photometric transit curve of CoRoT-8b as measured by CoRoT and the radial velocity curve of CoRoT-8 as measured b…
INTEGRAL/IBIS 7-year All-Sky Hard X-ray Survey. I. Image reconstruction
Sunyaev, R.; Krivonos, R.; Tsygankov, S. +5 more
This paper is the first in a series devoted to the hard X-ray whole sky survey performed by the INTEGRAL observatory over seven years. Here we present an improved method for image reconstruction with the IBIS coded mask telescope. The main improvements are related to the suppression of systematic effects that strongly limit sensitivity in the regi…
``TNOs are Cool'': A survey of the trans-Neptunian region. I. Results from the Herschel science demonstration phase (SDP)
Fornasier, S.; Groussin, O.; Gutiérrez, P. J. +32 more
The goal of the Herschel open time key programme “TNOs are Cool!” is to derive the physical and thermal properties for a large sample of Centaurs and trans-Neptunian objects (TNOs), including resonant, classical, detached and scattered disk objects. We present results for seven targets either observed in PACS point-source, or in mini scan-map mode…
Flux emergence and coronal eruption
Hood, A. W.; Archontis, V.
Aims: Our aim is to study the photospheric flux distribution of a twisted flux tube that emerges from the solar interior. We also report on the eruption of a new flux rope when the emerging tube rises into a pre-existing magnetic field in the corona.
Methods: To study the evolution, we use 3D numerical simulations by solving the time-dep…
Herschel-ATLAS: The angular correlation function of submillimetre galaxies at high and low redshift
Rodighiero, G.; de Zotti, G.; Herranz, D. +36 more
We present measurements of the angular correlation function of galaxies selected from the first field of the H-ATLAS survey. Careful removal of the background from galactic cirrus is essential, and currently dominates the uncertainty in our measurements. For our 250 µm-selected sample we detect no significant clustering, consistent with the …
The physical properties of the dust in the RCW 120 H II region as seen by Herschel
Miville-Deschênes, M. -A.; Boulanger, F.; Abergel, A. +43 more
Context. RCW 120 is a well-studied, nearby Galactic H ii region with ongoing star formation in its surroundings. Previous work has shown that it displays a bubble morphology at mid-infrared wavelengths, and has a massive layer of collected neutral material seen at sub-mm wavelengths. Given the well-defined photo-dissociation region (PDR) boundary …
A precise measurement of the solar differential rotation by tracing small bright coronal structures in SOHO-EIT images. Results and comparisons for the period 1998-2006
Hanslmeier, A.; Wöhl, H.; Brajša, R. +1 more
Aims: We precisely determine the solar rotation velocity during most of the 23rd solar cycle, in the years 1998-2006. We measure the solar differential rotation by tracing small bright coronal structures (SBCS) in SOHO-EIT images.
Methods: The 28.4 nm EIT channel was used and positions of more than 55 000 structures were measured applyin…
The extrasolar planet Gliese 581d: a potentially habitable planet?
Rauer, H.; von Paris, P.; Grenfell, J. L. +6 more
Aims: The planetary system around the M star Gliese 581 contains at least three close-in potentially low-mass planets, Gl 581c, d, and e. In order to address the question of the habitability of Gl 581d, we performed detailed atmospheric modeling studies for several planetary scenarios.
Methods: A 1D radiative-convective model was used to…