Search Publications
Comparison of hydrostatic and lensing cluster mass estimates: A pilot study in MACS J0647.7+7015
Macías-Pérez, J. F.; Perotto, L.; Pointecouteau, E. +6 more
The detailed characterization of scaling laws relating the observables of a cluster of galaxies to their mass is crucial for obtaining accurate cosmological constraints with clusters. In this paper, we present a comparison between the hydrostatic and lensing mass profiles of the cluster MACS J0647.7+7015 at z = 0.59. The hydrostatic mass profile i…
On the trail of a comet's tail: A particle tracking algorithm for comet 67P/Churyumov-Gerasimenko
Agarwal, Jessica; Pfeifer, Marius; Schröter, Matthias
Context. During the post-perihelion phase of the European Space Agency's Rosetta mission to comet
TUVOpipe: A pipeline to search for UV transients with Swift-UVOT
Wijnands, Rudy; Modiano, David; Parikh, Aastha +3 more
Despite the prevalence of transient-searching facilities operating across most wavelengths, the ultraviolet (UV) transient sky remains to be systematically studied. Therefore, we recently initiated the Transient Ultraviolet Objects (TUVO) project, with which we search for serendipitous UV transients in data obtained using currently available UV in…
SPHERE adaptive optics performance for faint targets
Jones, M. I.; Milli, J.; Blanchard, I. +4 more
Context. High-contrast imaging is a powerful technique for detecting and characterizing planetary companions at orbital separations ≳100 mas from their parent stars.
Aims: We aim to study the limiting magnitude of the VLT/SPHERE adaptive optics (AO) system and the corresponding instrument performance for faint targets (G ≥ 11.0 mag).
Met…
Predicting HCN, HCO+, multi-transition CO, and dust emission of star-forming galaxies. Constraining the properties of resolved gas and dust disks of local spiral galaxies
Braine, J.; Bigiel, F.; Gratier, P. +2 more
The interstellar medium is a turbulent, multiphase, and multi-scale medium that follows scaling relations that link the surface density, volume density, and velocity dispersion with the cloud size. Galactic clouds range from below 1 pc to about 100 pc in size. Extragalactic clouds appear to follow the same range, although they are only now becomin…
Existence of tidal tails for the globular cluster NGC 5824
Zhao, Gang; Zhao, Jing-Kun; Ishigaki, Miho N. +5 more
Context. Several dynamically cold streams have been associated with certain globular clusters (GCs) based on orbital energies and angular momenta. Some of these streams are surprisingly far apart from their progenitors and one such pair is Triangulum and NGC 5824. Triangulum can be considered as a piece of the leading tail of NGC 5824 since the cl…
The uncertain interstellar medium of high-redshift quiescent galaxies: Impact of methodology
Daddi, E.; Gobat, R.; Caminha, G. B. +3 more
How much gas and dust is contained in high-redshift quiescent galaxies (QGs) is currently an open question with relatively few and contradictory answers, as well as important implications for our understanding of the nature of star formation quenching processes at cosmic noon. Here we revisit far-infrared (FIR) observations of the REQUIEM-ALMA sam…
SDSS-IV MaStar: Stellar parameter determination with continuum-supplemented full-spectrum fitting
Bizyaev, Dmitry; Beers, Timothy C.; Holtzman, Jon A. +13 more
Aims: We present a stellar parameter catalog built to accompany the MaStar Stellar Library, which is a comprehensive collection of empirical, medium-resolution stellar spectra.
Methods: We constructed this parameter catalog by using a multicomponent χ2 fitting approach to match MaStar spectra to models generated by interpolati…
Analysis of the public HARPS/ESO spectroscopic archive. Jupiter-like planets around HD103891 and HD105779
Mazeh, T.; Zucker, S.; Tal-Or, L. +3 more
Aims: We use the recently published database of radial velocities (RVs) that were derived from fifteen years of HARPS/ESO observations to search for planet candidates.
Methods: For targets with sufficient RV data, we applied an automated algorithm to identify significant periodic signals and fit a Keplerian model for orbital estimates. W…
Radial distribution of plasma at comet 67P. Implications for cometary flyby missions
Henri, P.; Edberg, N. J. T.; Vigren, E. +3 more
Context. The Rosetta spacecraft followed comet 67P/Churyumov-Gerasimenko (67P) for more than two years at a slow walking pace (~1 m s−1) within 1500 km from the nucleus. During one of the radial movements of the spacecraft in the early phase of the mission, the radial distribution of the plasma density could be estimated, and the ionosp…