Search Publications
On the shape of the mass-function of dense clumps in the Hi-GAL fields . I. Spectral energy distribution determination and global properties of the mass-functions
Smith, M. D.; Montier, L.; Ristorcelli, I. +11 more
Context. Stars form in dense, dusty clumps of molecular clouds, but little is known about their origin and evolution. In particular, the relationship between the mass distribution of these clumps (also known as the clump mass function or CMF) and the stellar initial mass function (IMF), is still poorly understood.
Aims: To discern the "true" …
The northwestern ejecta knot in SN 1006
Miceli, M.; Bocchino, F.; Decourchelle, A. +3 more
Aims: We want to probe the physics of fast collision-less shocks in supernova remnants. We are interested in the non-equilibration of temperatures and particle acceleration. Specifically, we aim to measure the oxygen temperature with regards to the electron temperature. In addition, we search for synchrotron emission in the northwestern therm…
A coordinated optical and X-ray spectroscopic campaign on HD 179949: searching for planet-induced chromospheric and coronal activity
Moutou, C.; Donati, J. -F.; Scandariato, G. +10 more
Context.
Correlation of spectral solar irradiance with solar activity as measured by VIRGO
Schmutz, W.; Shapiro, A. I.; Wehrli, C.
Context. The variability of solar spectral irradiance (SSI) over the rotational period and its trend over the solar activity cycle are important for understanding the Sun-Earth connection as well as for observational constraints for solar models. Recently the Spectral Irradiance Monitor (SIM) experiment on the Solar Radiation and Climate Experimen…
Gas and dust cooling along the major axis of M 33 (HerM33es). ISO/LWS [C ii] observations
Boquien, M.; Braine, J.; van der Werf, P. +12 more
Aims: We aim to better understand the heating of gas by observing the prominent gas cooling line [C ii] at 158 µm in the low-metallicity environment of the Local Group spiral galaxy M 33 on scales of 280 pc. In particular, we describe the variation of the photoelectric heating efficiency with the galactic environment.
Methods: In t…
The HARPS search for southern extra-solar planets . XXXII. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone
Bouchy, F.; Moutou, C.; Queloz, D. +10 more
The vast diversity of planetary systems detected to date is defying our capability of understanding their formation and evolution. Well-defined volume-limited surveys are the best tool at our disposal to tackle the problem, via the acquisition of robust statistics of the orbital elements. We are using the HARPS spectrograph to conduct our survey o…
Dense gas in M 33 (HerM33es)
Boquien, M.; Braine, J.; van der Werf, P. +13 more
Aims: We aim to better understand the emission of molecular tracers of the diffuse and dense gas in giant molecular clouds and the influence that metallicity, optical extinction, density, far-UV field, and star formation rate have on these tracers.
Methods: Using the IRAM 30 m telescope, we detected HCN, HCO+, 12CO,…
Comparison of geoeffectiveness of coronal mass ejections and corotating interaction regions
Vršnak, B.; Verbanac, G.; Bandić, M. +2 more
Context. A detailed comparison of the geomagnetic responses to interplanetary coronal mass ejection (ICMEs) and corotating interaction regions (CIRs) during solar cycle 23 was performed using geomagnetic indices Dst, Ap, and AE.
Aims: We aim to find out if there are relative differences in the response of various magnetospheric current system…
Luminosities of carbon-rich asymptotic giant branch stars in the Milky Way
Cristallo, S.; Guandalini, R.
Context. Stars evolving along the asymptotic giant branch can become carbon-rich in the final part of their evolution. They replenish the inter-stellar medium with nuclear processed material via strong radiative stellar winds. The determination of the luminosity function of these stars, even if far from being conclusive, is extremely important for…
Chromospheric evaporation in sympathetic coronal bright points
Ji, H. S.; Zhang, Q. M.
Context. Chromospheric evaporation is a key process in solar flares that has been extensively investigated using spectroscopic observations. However, direct soft X-ray (SXR) imaging of the process is rare, especially in remote brightenings associated with the primary flares that have recently attracted a great deal of attention.
Aims: We inte…