34 citations · 76 across the 11 of their papers we have counts for
11 papers
The ESO SupJup Survey XI. Atmospheric properties of six isolated M- and L-type dwarfs with CRIRES+
C. R. Malcolm, N. Grasser, I. A. G. Snellen +9
The distinct formation pathways of brown dwarfs and giant exoplanets may be encoded in their atmospheric composition. We present atmospheric retrievals for six isolated brown dwarf…
The carbon isotope ratio of β Pic b with high-resolution spectroscopy
D. González Picos, I. A. G. Snellen, R. Landman +6
Isotopic ratios trace the formation and evolution of planets and link their atmospheres to the chemistry of their natal protoplanetary discs. We measure $^{12}\mathrm{C}/^{13}\math…
Strong and variable stratospheric CO emission from lava-planet 55 Cnc e observed with NIRCam/JWST
Ignas Snellen, Yamila Miguel, Leoni Janssen +4
Some rocky planets orbit so close to their host stars that stellar heating melts their surfaces. They offer a rare glimpse of planets in a magma-ocean state, providing an observabl…
JWST high-contrast spectroscopy with speckle modelling: Atmospheric retrievals of the T dwarf companion HD 19467 B
Darío González Picos, Tessa van der Post, Sam de Regt +3
High-contrast, medium-resolution spectroscopy with JWST can resolve molecular and isotopic features in cool substellar atmospheres, but for close-in companions the extracted spectr…
The ESO SupJup Survey IX: Isotopic evidence of a recent formation for Luhman 16AB
S. de Regt, I. A. G. Snellen, D. González Picos +8
The distinct formation pathways of directly-imaged exoplanets and isolated brown dwarfs might leave imprints in the inherited elemental and isotopic abundances, but such measuremen…
Disentangling disc and atmospheric signatures of young brown dwarfs with JWST/NIRSpec
D. González Picos, S. de Regt, S. Gandhi +2
Young brown dwarfs serve as analogues of giant planets and provide benchmarks for atmospheric and formation models. JWST has enabled access to near-infrared spectra of brown dwarfs…
The ESO SupJup Survey VIII. Chemical fingerprints of young L dwarf twins
N. Grasser, I. A. G. Snellen, S. de Regt +8
The potentially distinct formation pathways of exoplanets and brown dwarfs may be imprinted in their elemental and isotopic ratios. This work is part of the ESO SupJup Survey, whic…
The ESO SupJup Survey VII: Clouds and line asymmetries in CRIRES J-band spectra of the Luhman 16 binary
S. de Regt, I. A. G. Snellen, N. F. Allard +8
Brown dwarfs at the L-T transition likely experience an inhomogeneous clearing of the clouds in their atmospheres. The resulting surface of thin and thick cloudy patches has been p…
Peering above the clouds of the warm Neptune GJ 436b with CRIRES+
Natalie Grasser, Ignas A. G. Snellen, Rico Landman +2
Exoplanets with masses between Earth and Neptune are amongst the most commonly observed, yet their properties are poorly constrained. Their transmission spectra are often featurele…
Ages, metallicity, and alpha-enhancement of the globular cluster populations in NGC 3311
Natalie Grasser, Magda Arnaboldi, Carlos Eduardo Barbosa +3
Aims. We aim to investigate the stellar population properties, ages, and metal content of the globular clusters (GCs) in NGC 3311, the central galaxy of the Hydra I cluster, to bet…
The Oph region revisited with Gaia EDR3
Natalie Grasser, Sebastian Ratzenböck, João Alves +10
Context. Young and embedded stellar populations are important probes of the star formation process. Paradoxically, we have a better census of nearby embedded young populations than…