Search Publications
Distance estimates for AGB stars from parallax measurements
De Beck, E.; Ramstedt, S.; Vlemmings, W. H. T. +1 more
Context. Estimating the distances to asymptotic giant branch (AGB) stars using optical measurements of their parallaxes is not straightforward because of the large uncertainties introduced by their dusty envelopes, their large angular sizes, and their surface brightness variability.
Aims: This paper aims to assess the reliability of the dista…
The X-shooter Spectral Library (XSL): Data Release 3
Peletier, R. F.; Arentsen, A.; Coelho, P. R. T. +12 more
We present the third data release (DR3) of the X-shooter Spectral Library (XSL). This moderate-to-high resolution, near-ultraviolet-to-near-infrared (350-2480 nm, R ∼ 10 000) spectral library is composed of 830 stellar spectra of 683 stars. DR3 improves upon the previous data release by providing the combined de-reddened spectra of the three X-sho…
Inference of the cosmic rest-frame from supernovae Ia
Horstmann, Nick; Pietschke, Yannic; Schwarz, Dominik J.
We determine the proper motion of the Solar System from the Pantheon sample of type Ia supernovae (SNe). The posterior distribution of the Solar System proper velocity, its direction, and relevant cosmological parameters were obtained based on the observed distance moduli, heliocentric redshifts, and positions of SNe by means of a Markov chain Mon…
An estimation of the Gaia EDR3 parallax bias from stellar clusters and Magellanic Clouds data
Maíz Apellániz, J.
Context. The early-third Gaia data release (EDR3) parallaxes constitute the most detailed and accurate dataset that currently can be used to determine stellar distances in the solar neighborhood. Nevertheless, there is still room for improvement in their calibration and systematic effects can be further reduced in some circumstances.
Aims: Th…
A high angular resolution view of the PAH emission in Seyfert galaxies using JWST/MRS data
Rigopoulou, D.; García-Burillo, S.; Shimizu, T. +16 more
Polycyclic aromatic hydrocarbons (PAHs) are carbon-based molecules that are ubiquitous in a variety of astrophysical objects and environments. In this work we use JWST/MIRI MRS spectroscopy of three Seyferts to compare their nuclear PAH emission with that of star-forming (SF) regions. This study represents the first of its kind to use sub-arcsecon…
The population of hot subdwarf stars studied with Gaia. IV. Catalogues of hot subluminous stars based on Gaia EDR3
Geier, S.; Pelisoli, I.; Culpan, R. +3 more
In light of substantial new discoveries of hot subdwarfs by ongoing spectroscopic surveys and the availability of the Gaia mission Early Data Release 3 (EDR3), we compiled new releases of two catalogues of hot subluminous stars: The data release 3 (DR3) catalogue of the known hot subdwarf stars contains 6616 unique sources and provides multi-band …
The atmosphere and architecture of WASP-189 b probed by its CHEOPS phase curve
Alonso, R.; Deleuil, M.; Erikson, A. +83 more
Context. Gas giants orbiting close to hot and massive early-type stars can reach dayside temperatures that are comparable to those of the coldest stars. These `ultra-hot Jupiters' have atmospheres made of ions and atomic species from molecular dissociation and feature strong day-to-night temperature gradients. Photometric observations at different…
The PLATO field selection process. I. Identification and content of the long-pointing fields
Heras, A. M.; Deleuil, M.; Rauer, H. +26 more
PLAnetary Transits and Oscillations of stars is an ESA M-class satellite planned for launch by the end of 2026 and dedicated to the wide-field search of transiting planets around bright and nearby stars, with a strong focus on discovering habitable rocky planets hosted by solar-like stars. The choice of the fields to be pointed at is a crucial tas…
The complex time and energy evolution of quasi-periodic eruptions in eRO-QPE1
Salvato, M.; Buchner, J.; Nandra, K. +8 more
Quasi-periodic eruptions (QPEs) are recurrent X-ray bursts found in the nuclei of low-mass galaxies. Their trigger mechanism is still unknown, but recent models involving one or two stellar-mass companions around the central massive (≈105 − 106 M⊙) black hole have gathered significant attention. While these models …
Newly detected open clusters in the Galactic disk using Gaia EDR3
Hao, C. J.; Xu, Y.; Lin, Z. H. +3 more
The astrometric satellite Gaia recently released part of its third data set, which provides a good opportunity to hunt for more open clusters in the Milky Way. In this work, we conduct a blind search for open clusters in the Galactic disk using a sample-based clustering search method with high spatial resolution, which is especially suited to find…