Search Publications
On the nature of the candidate T-Tauri star V501 Aurigae★
Neuhäuser, R.; Ginski, C.; Mugrauer, M. +18 more
We report new multicolour photometry and high-resolution spectroscopic observations of the long-period variable V501 Aur, previously considered to be a weak-lined T-Tauri star belonging to the Taurus-Auriga star-forming region. The spectroscopic observations reveal that V501 Aur is a single-lined spectroscopic binary system with a 68.8-d orbital p…
A (likely) X-ray jet from NGC6217 observed by XMM-Newton
Larsson, Josefin; Falocco, Serena; Nandi, Sumana
NGC6217 is a nearby spiral galaxy with a starburst region near its centre. Evidence for a low-luminosity Active Galactic Nucleus (AGN) in its core has also been found in optical spectra. Intriguingly, X-ray observations by ROSAT revealed three knots aligned with the galaxy centre, resembling a jet structure. This paper presents a study of XMM-Newt…
Study of a large arched structure of interstellar H I in the southern Milky Way
Olano, C. A.
We have revisited the sky region delimited by 290° < l < 320° and 3° < b < 17°, which includes a large arc of neutral hydrogen (H I), and extended the study region using the Leiden-Argentine-Bonn H I survey. The H I arc is almost an open downward semi-circumference of ≈10° of radius, with the symmetry axis perpendicular to the Galactic…
The 5 Gyr evolution of sub-M* galaxies
Yang, Y.; Flores, H.; Hammer, F. +3 more
We gathered two complete samples of MAB(r) < -18 (Mstar > 109 M⊙) galaxies, which are representative of the present-day galaxies and their counterparts at 5 Gyr ago. We analysed their 2D luminosity profiles and carefully decomposed them into bulges, bars and discs. This was done in a very consisten…
Editorial: Comets: A new vision after Rosetta and Philae
Taylor, Matt G. G. T.
Effects of the convective field on weakly outgassing comets
Galand, M.; Beth, A.
By applying a kinetic approach, we have developed two models in order to assess the influence of one main driver of plasma acceleration, the convective electric field, on the cometary ion distribution at 67P/Churyumov-Gerasimenko (67P/C-G). This electric field is carried by the solar wind and corresponds to the acceleration undergone by cometary i…
UV-extended E-MILES stellar population models: young components in massive early-type galaxies
Koleva, M.; Falcón-Barroso, J.; Ricciardelli, E. +2 more
We present UV-extended E-MILES stellar population synthesis models covering the spectral range λλ 1680-50 000 Å at moderately high resolution. We employ the NGSL space-based stellar library to compute spectra of single-age, single-metallicity stellar populations in the wavelength range from 1680 to 3540 Å. These models represent a significant impr…
A unified multiwavelength model of galaxy formation
Baugh, Carlton M.; Lagos, Claudia D. P.; Cole, Shaun +7 more
We present a new version of the GALFORM semi-analytical model of galaxy formation. This brings together several previous developments of GALFORM into a single unified model, including a different initial mass function (IMF) in quiescent star formation and in starbursts, feedback from active galactic nuclei suppressing gas cooling in massive haloes…
Modelling and interpreting spectral energy distributions of galaxies with BEAGLE
Charlot, Stéphane; Chevallard, Jacopo
We present a new-generation tool to model and interpret spectral energy distributions (SEDs) of galaxies, which incorporates in a consistent way the production of radiation and its transfer through the interstellar and intergalactic media. This flexible tool, named BEAGLE (for BayEsian Analysis of GaLaxy sEds), allows one to build mock galaxy cata…
Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies
Schaerer, D.; Thuan, T. X.; Izotov, Y. I. +4 more
Following our first detection reported in Izotov et al., we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming galaxies observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope. These galaxies, at redshifts of z ∼ 0.3, are characterized by high emission-line flux ratios [O III]…