Search Publications
VELOcities of CEpheids (VELOCE). I. High-precision radial velocities of Cepheids
Spetsieri, Zoi T.; Anderson, Richard I.; Cruz Reyes, Mauricio +27 more
We present the first data release of VELOcities of CEpheids (VELOCE), dedicated to measuring the high-precision radial velocities (RVs) of Galactic classical Cepheids (henceforth, Cepheids). The first data release (VELOCE DR1) comprises 18 225 RV measurements of 258 bona fide classical Cepheids on both hemispheres collected mainly between 2010 and…
KRATOS: A large suite of N-body simulations to interpret the stellar kinematics of LMC-like discs
Luri, X.; Bernet, M.; Chemin, L. +4 more
Context. The Large and Small Magellanic Clouds (LMC and SMC, respectively) are the brightest satellites of the Milky Way (MW), and for the last thousand million years they have been interacting with one another. As observations only provide a static picture of the entire process, numerical simulations are used to interpret the present-day observat…
MINDS: A multi-instrument investigation into the molecule-rich JWST-MIRI spectrum of the DF Tau binary system
Banzatti, Andrea; Henning, Thomas; Güdel, Manuel +26 more
Context. The majority of young stars form in multiple systems, the properties of which can significantly impact the evolution of any circumstellar disks. Aims. We investigate the physical and chemical properties of the equal-mass, small-separation (~66 milliarcsecond, ~9 au) binary system DF Tau. Previous spatially resolved observations indicate t…
Searching for precursor activity of Type IIn supernovae
Reichart, D. E.; Pignata, G.; Haislip, J. B. +4 more
We conducted a search for luminous outbursts prior to the explosion of Type IIn supernovae (SNe IIn). We built a sample of 27 objects spectroscopically classified as SNe IIn and all located at z < 0.015. Using deep archival SN fields images - taken up to nearly 20 yr prior to the SN explosions themselves - from transient surveys (PTF, ZTF, DES …
Bayesian analysis of the molecular emission and dust continuum of protoplanetary disks
Woitke, P.; Kamp, I.; Min, M. +2 more
Context. The MIRI instrument on board the James Webb Space Telescope probes the chemistry and dust mineralogy of the inner regions of protoplanetary disks. The observed spectra are unprecedented in their detail and reveal a rich chemistry with strong diversity between objects. This complicates interpretations that are mainly based on manual contin…
JWST detections of amorphous and crystalline HDO ice toward massive protostars
Manoj, P.; Narang, Mayank; Bourke, Tyler L. +19 more
Context. Tracing the origin and evolution of interstellar water is key to understanding many of the physical and chemical processes involved in star and planet formation. Deuterium fractionation offers a window into the physicochemical history of water due to its sensitivity to local conditions.
Aims: The aim of this work is to utilize the in…
The SPHERE view of the Chamaeleon I star-forming region. The full census of planet-forming disks with GTO and DESTINYS programs
Pinte, C.; Rab, C.; Schmidt, T. O. B. +32 more
Context. The past few years have seen a revolution in the study of circumstellar disks. New instrumentation in the near-infrared and (sub)millimeter regimes have allowed us to routinely spatially resolve disks around young stars of nearby star-forming regions. As a result, we have found that substructures with scales of ~10 au in disks are common.…
Active galactic nucleus X-ray luminosity function and absorption function in the Early Universe (3 ≤ z ≤ 6)
Paltani, S.; Pierre, M.; Vignali, C. +15 more
The X-ray luminosity function (XLF) of active galactic nuclei (AGN) offers a robust tool to study the evolution and the growth of the supermassive black-hole population over cosmic time. Owing to the limited area probed by X-ray surveys, optical surveys are routinely used to probe the accretion in the high-redshift Universe z ≥ 3. However, optical…
LIME: A LIne MEasuring library for large and complex spectroscopic data sets. I. Implementation of a virtual observatory for JWST spectra
Morisset, C.; Amorín, R.; Firpo, V. +1 more
Context. The upcoming generation of telescopes, instruments, and surveys is poised to usher in an unprecedented "Big Data" era in the field of astronomy. Within this context, even seemingly modest tasks such as spectral line analyses could become increasingly challenging for astronomers.
Aims: In this paper, we announce the release of LIME. T…
The tangled warp of the Milky Way
McMillan, Paul J.; Jónsson, Viktor Hrannar
Aims: We aim to determine the influence of the Milky Way's warp on the kinematics of stars across the disc, and therefore measure its precession rate and line of nodes under different assumptions.
Methods: We applied Jeans' first equation to a model of a rigidly precessing warp. The predictions of these models were fitted to the average …