Search Publications
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…
A ring in a shell: the large-scale 6D structure of the Vela OB2 complex
Jordi, C.; Cantat-Gaudin, T.; Balaguer-Núñez, L. +3 more
Context. The Vela OB2 association is a group of ∼10 Myr stars exhibiting a complex spatial and kinematic substructure. The all-sky Gaia DR2 catalogue contains proper motions, parallaxes (a proxy for distance), and photometry that allow us to separate the various components of Vela OB2.
Aims: We characterise the distribution of the Vela OB2 st…
The Gaia-ESO survey: Calibrating a relationship between age and the [C/N] abundance ratio with open clusters
Gilmore, G.; Bayo, A.; Prada Moroni, P. G. +51 more
Context. In the era of large high-resolution spectroscopic surveys such as Gaia-ESO and APOGEE, high-quality spectra can contribute to our understanding of the Galactic chemical evolution by providing abundances of elements that belong to the different nucleosynthesis channels, and also by providing constraints to one of the most elusive astrophys…
Constraining disk evolution prescriptions of planet population synthesis models with observed disk masses and accretion rates
Lodato, G.; Testi, L.; Williams, J. P. +4 more
While planets are commonly discovered around main-sequence stars, the processes leading to their formation are still far from being understood. Current planet population synthesis models, which aim to describe the planet formation process from the protoplanetary disk phase to the time exoplanets are observed, rely on prescriptions for the underlyi…
Chemical (in)homogeneity and atomic diffusion in the open cluster M 67
Yong, D.; Asplund, M.; Dotter, A. +4 more
Context. The benchmark open cluster M 67 is known to have solar metallicity and an age similar to that of the Sun. It thus provides us with a great opportunity to study the properties of solar twins, as well as the evolution of Sun-like stars.
Aims: Previous spectroscopic studies of M 67 reported possible subtle changes in stellar surface abu…