Search Publications
Gas lines from the 5-Myr old optically thin disk around HD 141569A . Herschel observations and modeling
Pinte, C.; Ménard, F.; Woitke, P. +20 more
Context. The gas- and dust dissipation processes in disks around young stars remain uncertain despite numerous studies. At the distance of ~99-116 pc, HD 141569A is one of the nearest HerbigAe stars that is surrounded by a tenuous disk, probably in transition between a massive primordial disk and a debris disk. Atomic and molecular gases have been…
Long-term change in the cyclotron line energy in Hercules X-1
Harrison, F. A.; Klochkov, D.; Wilms, J. +5 more
Aims: We investigate the long-term evolution of the cyclotron resonance scattering feature (CRSF) in the spectrum of the binary X-ray pulsar
Metho…
Star formation histories, extinction, and dust properties of strongly lensed z ~ 1.5-3 star-forming galaxies from the Herschel Lensing Survey
Smail, I.; Altieri, B.; Schaerer, D. +11 more
Context. Multi-wavelength, optical to IR/submm observations of strongly lensed galaxies identified by the Herschel Lensing Survey are used to determine the physical properties of high-redshift star-forming galaxies close to or below the detection limits of blank fields.
Aims: We aim to constrain theIR stellar and dust content, and to determin…
Extending the supernova Hubble diagram to z ~ 1.5 with the Euclid space mission
Della Valle, M.; Sullivan, M.; Kessler, R. +25 more
We forecast dark energy constraints that could be obtained from a new large sample of Type Ia supernovae where those at high redshift are acquired with the Euclid space mission. We simulate a three-prong SN survey: a z < 0.35 nearby sample (8000 SNe), a 0.2 < z < 0.95 intermediate sample (8800 SNe), and a 0.75 < z < 1.55 high-z samp…
Far-infrared molecular lines from low- to high-mass star forming regions observed with Herschel
Braine, J.; Fedele, D.; Contursi, A. +13 more
Aims: Our aim is to study the response of the gas-to-energetic processes associated with high-mass star formation and compare it with previously published studies on low- and intermediate-mass young stellar objects (YSOs) using the same methods. The quantified far-IR line emission and absorption of CO, H2O, OH, and [O i] reveals th…
An edge-on translucent dust disk around the nearest AGB star, L2 Puppis. VLT/NACO spectro-imaging from 1.04 to 4.05 µm and VLTI interferometry
Kervella, P.; Chiavassa, A.; Chesneau, O. +6 more
As the nearest known AGB star (d = 64 pc) and one of the brightest (mK ≈ -2), L2 Pup is a particularly interesting benchmark object to monitor the final stages of stellar evolution. We report new serendipitous imaging observations of this star with the VLT/NACO adaptive optics system in twelve narrow-band filters covering the…
Resolving HD 100546 disc in the mid-infrared: Small inner disc and asymmetry near the gap
Jaffe, W.; Dominik, C.; Henning, Th. +5 more
Context. A region of roughly half of the solar system scale around the star HD 100546 is known to be largely cleared of gas and dust, in contrast to the outer disc that extends to about 400 AU. However, some material is observed in the immediate vicinity of the star, called the inner disc. Studying the structure of the inner and the outer disc is …
ALMA observations of cool dust in a low-metallicity starburst, SBS 0335-052
Maiolino, R.; Menten, K. M.; Hunt, L. K. +9 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 0 Band 7 observations of an extremely metal-poor dwarf starburst galaxy in the Local Universe, SBS 0335-052 (12 + log (O/H) ~ 7.2). With these observations, dust is detected at 870 µm (ALMA Band 7), but 87% of the flux in this band is due to free-free emission from the star…
Kinematic structure of massive star-forming regions. I. Accretion along filaments
Henning, Th.; Krause, O.; Beuther, H. +8 more
Context. The mid- and far-infrared view on high-mass star formation, in particular with the results from the Herschel space observatory, has shed light on many aspects of massive star formation. However, these continuum studies lack kinematic information.
Aims: We study the kinematics of the molecular gas in high-mass star-forming regions.
A photometric and spectroscopic survey of solar twin stars within 50 parsecs of the Sun. I. Atmospheric parameters and color similarity to the Sun
Porto de Mello, G. F.; da Silva, R.; da Silva, L. +1 more
Context. Solar twins and analogs are fundamental in the characterization of the Sun's place in the context of stellar measurements, as they are in understanding how typical the solar properties are in its neighborhood. They are also important for representing sunlight observable in the night sky for diverse photometric and spectroscopic tasks, bes…