Search Publications
Binaries among low-mass stars in nearby young moving groups
Henning, Thomas; Brandner, Wolfgang; Schlieder, Joshua +5 more
The solar galactic neighborhood contains a number of young co-moving associations of stars (known as young moving groups) with ages of 10-150 Myr, which are prime targets for a range of scientific studies, including direct imaging planet searches. The late-type stellar populations of such groups still remain in their pre-main sequence phase, and a…
HADES RV Programme with HARPS-N at TNG. V. A super-Earth on the inner edge of the habitable zone of the nearby M dwarf GJ 625
Rebolo, R.; Ribas, I.; Morales, J. C. +27 more
We report the discovery of a super-Earth orbiting at the inner edge of the habitable zone of the star GJ 625 based on the analysis of the radial-velocity (RV) time series from the HARPS-N spectrograph, consisting of 151 HARPS-N measurements taken over 3.5 yr. GJ 625 b is a planet with a minimum mass Msini of 2.82 ± 0.51 M⊕ with an orbit…
Cliffs versus plains: Can ROSINA/COPS and OSIRIS data of comet 67P/Churyumov-Gerasimenko in autumn 2014 constrain inhomogeneous outgassing?
Jorda, L.; Altwegg, K.; Sierks, H. +18 more
Context. This paper describes the modelling of gas and dust data acquired in the period August to October 2014 from the European Space Agency's Rosetta spacecraft when it was in close proximity to the nucleus of comet 67P/Churyumov-Gerasimenko.
Aims: With our 3D gas and dust comae models this work attempts to test the hypothesis that cliff ac…
Are we seeing accretion flows in a 250 kpc Lyα halo at z = 3?
Boulanger, F.; Humphrey, A.; Villar-Martín, M. +8 more
Using MUSE on the ESO-VLT, we obtained a four-hour exposure of the z = 3.12 radio galaxy MRC 0316-257. We detect features down to 10-19 erg s-1 cm-2 arcsec-2, with the highest surface brightness regions reaching more than a factor of 100 higher. We find Lyα emission out to 250 kpc in projection from the …
Relationship between turbulence energy and density variance in the solar neighbourhood molecular clouds
Federrath, C.; Kainulainen, J.
The relationship between turbulence energy and gas density variance is a fundamental prediction for turbulence-dominated media and is commonly used in analytic models of star formation. We determine this relationship for 15 molecular clouds in the solar neighbourhood. We use the line widths of the CO molecule as the probe of the turbulence energy …
New outburst of the symbiotic nova AG Pegasi after 165 yr
Wolf, M.; Boyd, D.; Skopal, A. +13 more
Context. AG Peg is known as the slowest symbiotic nova, which experienced its nova-like outburst around 1850. After 165 yr, during June of 2015, it erupted again showing characteristics of the Z And-type outburst.
Aims: The primary objective is to determine basic characteristics, the nature and type of the 2015 outburst of AG Peg.
Method…
A combined HST and XMM-Newton campaign for the magnetic O9.7 V star HD 54879. Constraining the weak-wind problem of massive stars
Ilyin, I.; Hamann, W. -R.; Hubrig, S. +7 more
Context.
Aims: To gain insights into the interplay between atmospheres, winds, and magnetic fields of massive s…
Production of O2 through dismutation of H2O2 during water ice desorption: a key to understanding comet O2 abundances
Bockelée-Morvan, D.; Dulieu, F.; Minissale, M.
Context. Detection of molecular oxygen and prediction of its abundance have long been a challenge for astronomers. The low abundances observed in few interstellar sources are well above the predictions of current astrochemical models. During the Rosetta mission, an unexpectedly high abundance of O2 was discovered in the comet 67P/Churyu…
Long optical plateau in the afterglow of the short GRB 150424A with extended emission. Evidence for energy injection by a magnetar?
Greiner, J.; Klose, S.; Schady, P. +14 more
Context. Short-duration gamma-ray bursts (GRBs) with extended emission form a subclass of short GRBs, comprising about 15% of the short-duration sample. Afterglow detections of short GRBs are also rare (about 30%) because of their lower luminosity.
Aims: We present a multiband data set of the short burst with extended emission, GRB 150424A, c…
The ALMA Frontier Fields Survey. III. 1.1 mm emission line identifications in Abell 2744, MACSJ 0416.1-2403, MACSJ 1149.5+2223, Abell 370, and Abell S1063
Kneissl, R.; Demarco, R.; Laporte, N. +12 more
Context. Most sub-mm emission line studies of galaxies to date have targeted sources with known redshifts where the frequencies of the lines are well constrained. Recent blind line scans circumvent the spectroscopic redshift requirement, which could represent a selection bias.
Aims: Our aim is to detect emission lines present in continuum ori…