Search Publications
Col-OSSOS: The Two Types of Kuiper Belt Surfaces
Marsset, Michaël; Fraser, Wesley C.; Pike, Rosemary E. +12 more
The Colors of the Outer Solar System Origins Survey (Col-OSSOS) has gathered a high-quality, near-simultaneous, and brightness-complete sample of (g - r) and (r - J) colors for 102 Kuiper Belt objects (KBOs) with (u - g) and (r - z) gathered for some. We present the current state of the survey and data analysis. Recognizing that the optical colors…
Dust Properties of 870 µm-selected Galaxies in GOODS-S
Bauer, F. E.; Barger, A. J.; Cowie, L. L. +2 more
We analyze the dust properties of 57 870 µm-selected dusty star-forming galaxies in GOODS-S using new deep Atacama Large Millimeter/Submillimeter Array 1.2, 2, and 3 mm continuum imaging together with other far-infrared through millimeter data. We fit the spectral energy distributions (SEDs) with optically thin modified blackbodies to constr…
Combining HIPPARCOS and Gaia data for the study of binaries: The BINARYS tool
Arenou, F.; Babusiaux, C.; van Leeuwen, F. +6 more
Context. Orbital motion in binary and planetary systems is the main source of precise stellar and planetary mass measurements, and the joint analysis of data obtained using multiple observational methods can both lift degeneracies and improve precision.
Aims: We set out to measure the masses of individual stars in binary systems using all the…
Using shell models to investigate clumping in the WN4 star HD 50896
Hillier, D. John; Dessart, Luc; Flores, Brian L.
The spectra of Wolf-Rayet (WR) stars exhibit strong, broad emission lines that originate in the wind. These winds are radiatively driven and are susceptible to hydrodynamic instabilities that result in the formation of clumps. When modelling spectra of WR stars the volume-filling factor (VFF) approach is usually employed to treat clumpy winds. How…
Photometric metallicity for 694 233 Galactic giant stars from Gaia DR3 synthetic Strömgren photometry. Metallicity distribution functions of halo substructures
Massari, D.; De Angeli, F.; Riello, M. +4 more
We used two previous calibrations and the standardised synthetic photometry in the v, b, and y Strömgren passbands from Gaia DR3 BP/RP spectra to obtain photometric metallicities for a selected sample of 694 233 old Galactic giant stars having |b|> 20.0° and parallax uncertainties lower than 10%. The zero point of both sets of photometric metal…
Calibrating angular momentum transport in intermediate-mass stars from gravity-mode asteroseismology
Mombarg, J. S. G.
Context. The physical mechanisms driving the transport of angular momentum in stars are not fully understood, as current models cannot explain the observed stellar rotation profiles across all stages of evolution.
Aims: By making use of pulsating F-type dwarfs, we aim to (i) observationally calibrate the efficiency of angular momentum transpo…
The slippery slope of dust attenuation curves. Correlation of dust attenuation laws with star-to-dust compactness up to z = 4
Ciesla, L.; Buat, V.; Małek, K. +5 more
Aims: We investigate the dust attenuation of 122 heavily dust-obscured galaxies detected with the Atacama Large Millimeter Array (ALMA) and Herschel in the COSMOS field. We search for correlations between dust attenuation recipes and the variation of physical parameters, namely, the effective radii of galaxies, their star formation rates, and…
Carbon-oxygen ultra-massive white dwarfs in general relativity
Córsico, Alejandro H.; Rebassa-Mansergas, Alberto; Althaus, Leandro G. +4 more
We employ the La Plata stellar evolution code, LPCODE, to compute the first set of constant rest-mass carbon-oxygen ultra-massive white dwarf evolutionary sequences for masses higher than 1.29 M⊙ that fully take into account the effects of general relativity on their structural and evolutionary properties. In addition, we employ the LP-…
Tidally induced velocity gradients in the Milky Way dwarf spheroidal satellites
del Pino, Andrés; Aparicio, Antonio; Martínez-García, Alberto Manuel
We present a kinematic study of six dwarf spheroidal galaxies (dSph) satellites of the Milky Way (MW), namely Carina, Draco, Fornax, Sculptor, Sextans, and Ursa Minor. We combine proper motions (PMs) from the Gaia Data Release 3 (DR3) and line-of-sight velocities (vlos) from the literature to derive their 3D internal kinematics and to s…
Solution to the Conflict between the Estimations of Resolved and Unresolved Galaxy Stellar Mass from the Perspective of JWST
Lin, Zesen; Kong, Xu; Gu, Yizhou +2 more
By utilizing the spatially resolved photometry of galaxies at 0.2 < z < 3.0 in the CEERS field, we estimate the resolved and unresolved stellar mass via fitting of the spectral energy distribution (SED) to study the discrepancy between them. We first compare M * derived from photometry with and without the JWST wavelength coverage…