Search Publications
Constraining the solar neighbourhood age-metallicity relation from white dwarf-main sequence binaries
Gänsicke, B. T.; Tremblay, P. -E.; Koester, D. +11 more
The age-metallicity relation (AMR) is a fundamental tool for constraining the chemical evolution of the Galactic disc. In this work, we analyse the observational properties of this relation using binary stars that have not interacted consisting of a white dwarf (WD) - from which we can derive the total age of the system - and a main sequence (MS) …
Dependence of dark matter - electron scattering on the galactic dark matter velocity distribution
Radick, Aria; Taki, Anna-Maria; Yu, Tien-Tien
The rate of dark matter-electron scattering depends on the underlying velocity distribution of the dark matter halo. Importantly, dark matter-electron scattering is particularly sensitive to the high-velocity tail, which differs significantly amongst the various dark matter halo models. In this work, we summarize the leading halo models and discus…
An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685
Tamura, M.; Amado, P. J.; Caballero, J. A. +51 more
Dynamical histories of planetary systems, as well as the atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population, which the TESS mission is particularly well suited to discover. Here, we report on the follow-up of a transit signal detected in the TESS sector 19 photometric time …
Classical Cepheids in the Milky Way
Soszyński, I.; Udalski, A.; Pietrukowicz, P.
We share the most up-to-date, carefully verified list of classical Cepheids residing in the Galaxy. Based on long-term OGLE experience in the field of variable stars, we have inspected candidates for Cepheids from surveys such as ASAS, ASAS-SN, ATLAS, Gaia, NSVS, VVV, WISE, ZTF, among others, and also known sources from the General Catalogue of Va…
An ALMA study of hub-filament systems - I. On the clump mass concentration within the most massive cores
Peretto, Nicolas; Ragan, Sarah E.; Traficante, Alessio +7 more
The physical processes behind the transfer of mass from parsec-scale clumps to massive star-forming cores remain elusive. We investigate the relation between the clump morphology and the mass fraction that ends up in its most massive core (MMC) as a function of infrared brightness, i.e. a clump evolutionary tracer. Using Atacama Large Millimeter/s…
A Duality in the Origin of Bulges and Spheroidal Galaxies
Pérez-González, Pablo G.; Costantin, Luca; Koekemoer, Anton M. +11 more
Studying the resolved stellar populations of the different structural components that build massive galaxies directly unveils their assembly history. We aim at characterizing the stellar population properties of a representative sample of bulges and pure spheroids in massive galaxies (M⋆ > 1010 M⊙) in the GOODS-…
Space-Based Photometry of Binary Stars: From Voyager to TESS
Southworth, John
Binary stars are crucial laboratories for stellar physics, so have been photometric targets for space missions beginning with the very first orbiting telescope (OAO-2) launched in 1968. This review traces the binary stars observed and the scientific results obtained from the early days of ultraviolet missions (OAO-2, Voyager, ANS, IUE), through a …
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT). V. Sample, overview, and demography of disk molecular emission
Podio, L.; Bacciotti, F.; Fedele, D. +9 more
We present an overview of the ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT), a campaign devoted to the characterization of the molecular emission from partly embedded young stars. The project is aimed at attaining a better understanding of the gaseous products delivered to planets by means of high-resolution maps of the assorte…
From Starspots to Stellar Coronal Mass Ejections—Revisiting Empirical Stellar Relations
Papaioannou, Athanasios; Herbst, Konstantin; Airapetian, Vladimir S. +1 more
Upcoming missions, including the James Webb Space Telescope, will soon characterize the atmospheres of terrestrial-type exoplanets in habitable zones around cool K- and M-type stars by searching for atmospheric biosignatures. Recent observations suggest that the ionizing radiation and particle environment from active cool planet hosts may be detri…
MOVES - IV. Modelling the influence of stellar XUV-flux, cosmic rays, and stellar energetic particles on the atmospheric composition of the hot Jupiter HD 189733b
Vidotto, A. A.; Bourrier, V.; Fares, R. +7 more
Hot Jupiters provide valuable natural laboratories for studying potential contributions of high-energy radiation to pre-biotic synthesis in the atmospheres of exoplanets. In this fourth paper of the Multiwavelength Observations of an eVaporating Exoplanet and its Star (MOVES) programme, we study the effect of different types of high-energy radiati…