Search Publications
Galaxy populations in the most distant SPT-SZ clusters. I. Environmental quenching in massive clusters at 1.4 ≲ z ≲ 1.7
Bayliss, M. B.; Sharon, K.; Schrabback, T. +25 more
We present the first results from a galaxy population study in the highest redshift galaxy clusters identified in the 2500 deg2 South Pole Telescope Sunyaev Zel'dovich effect (SPT-SZ) survey, which is sensitive to M500 ≳ 3 × 1014 M⊙ clusters from z ∼ 0.2 out to the highest redshifts where such massive st…
New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field
Khan, S.; Cantat-Gaudin, T.; Chaplin, W. J. +15 more
The importance of studying the Gaia DR2 parallax zero-point by external means was underlined by the articles that accompanied the release, and initiated by several works making use of Cepheids, eclipsing binaries, and asteroseismology. Despite a very efficient elimination of basic-angle variations, a small fluctuation remains and shows up as a sma…
X-ray emission of z > 2.5 active galactic nuclei can be obscured by their host galaxies
Feltre, A.; Massardi, M.; Vignali, C. +6 more
We present a multiwavelength study of seven active galactic nuclei (AGN) at spectroscopic redshift >2.5 in the 7 Ms Chandra Deep Field South that were selected for their good far-infrared (FIR) and submillimeter (submm) detections. Our aim is to investigate the possibility that the obscuration observed in the X-rays can be produced by the inter…
A possibly inflated planet around the bright young star DS Tucanae A
Sabotta, S.; Messina, S.; D'Orazi, V. +13 more
Context. The origin of the observed diversity of planetary system architectures is one of the main topics of exoplanetary research. The detection of a statistically significant sample of planets around young stars allows us to study the early stages of planet formation and evolution, but only a handful are known so far. In this regard a considerab…
Organic chemistry in the innermost, infalling envelope of the Class 0 protostar L483
Choi, Minho; Di Francesco, James; Lee, Jeong-Eun +3 more
Context. Observations of the innermost regions of deeply embedded protostellar cores have revealed complicated physical structures as well as a rich chemistry with the existence of complex organic molecules. The protostellar envelopes, outflow, and large-scale chemistry of Class 0 and Class I objects have been well studied, but while previous work…
Water vapor detection in the transmission spectra of HD 209458 b with the CARMENES NIR channel
Schmitt, J. H. M. M.; Alonso-Floriano, F. J.; Sánchez-López, A. +31 more
Aims: We aim at detecting water vapor in the atmosphere of the hot Jupiter HD 209458 b and perform a multi-band study in the near infrared with CARMENES.
Methods: The water vapor absorption lines from the atmosphere of the planet are Doppler-shifted due to the large change in its radial velocity during transit. This shift is of the order…
Ring structure in the MWC 480 disk revealed by ALMA
Pascucci, Ilaria; Banzatti, Andrea; Herczeg, Gregory J. +20 more
Gap-like structures in protoplanetary disks are likely related to planet formation processes. In this paper, we present and analyze high-resolution (0.17''× 0.11'') 1.3 mm ALMA continuum observations of the protoplanetary disk around the Herbig Ae star MWC 480. Our observations show for the first time a gap centered at 74 au with a width of 23 au,…
PynPoint: a modular pipeline architecture for processing and analysis of high-contrast imaging data
Quanz, S. P.; Amara, A.; Stolker, T. +4 more
Context. The direct detection and characterization of planetary and substellar companions at small angular separations is a rapidly advancing field. Dedicated high-contrast imaging instruments deliver unprecedented sensitivity, enabling detailed insights into the atmospheres of young low-mass companions. In addition, improvements in data reduction…
Gaia kinematics reveal a complex lopsided and twisted Galactic disc warp
Castro-Ginard, A.; Figueras, F.; Romero-Gómez, M. +2 more
Context. There are few warp kinematic models of the Galaxy able to characterise both structure and kinematics, since these require high accuracy at large distances. These models are necessary to shed light on the lopsidedness of the warp and the twisting of the line-of-nodes of the stellar warp already seen in gas and dust.
Aims: We use the v…
Nuclear molecular outflow in the Seyfert galaxy NGC 3227
Rigopoulou, D.; Hunt, L. K.; Vestergaard, M. +24 more
ALMA observations have revealed nuclear dusty molecular disks or tori with characteristic sizes 15-40 pc in the few Seyferts and low -luminosity AGN that have been studied so far. These structures are generally decoupled both morphologically and kinematically from the host galaxy disk. We present ALMA observations of the CO(2-1) and CO(3-2) molecu…