Search Publications
Constraining the thermally pulsing asymptotic giant branch phase with resolved stellar populations in the Small Magellanic Cloud
Boyer, Martha L.; Girardi, Léo; Dalcanton, Julianne J. +17 more
The thermally pulsing asymptotic giant branch (TP-AGB) experienced by low- and intermediate-mass stars is one of the most uncertain phases of stellar evolution and the models need to be calibrated with the aid of observations. To this purpose, we couple high-quality observations of resolved stars in the Small Magellanic Cloud (SMC) with detailed s…
The CARMENES search for exoplanets around M dwarfs. Different roads to radii and masses of the target stars
Schmitt, J. H. M. M.; del Burgo, C.; Amado, P. J. +28 more
Aims: We determine the radii and masses of 293 nearby, bright M dwarfs of the CARMENES survey. This is the first time that such a large and homogeneous high-resolution (R > 80 000) spectroscopic survey has been used to derive these fundamental stellar parameters.
Methods: We derived the radii using Stefan-Boltzmann's law. We obtained …
Observational Constraints on the Merger History of Galaxies since z ≈ 6: Probabilistic Galaxy Pair Counts in the CANDELS Fields
Pérez-González, Pablo G.; Grogin, Norman A.; Koekemoer, Anton M. +13 more
Galaxy mergers are expected to have a significant role in the mass assembly of galaxies in the early universe, but there are very few observational constraints on the merger history of galaxies at z > 2. We present the first study of galaxy major mergers (mass ratios <1:4) in mass-selected samples out to z ≈ 6. Using all five fields of the H…
The Southern Photometric Local Universe Survey (S-PLUS): improved SEDs, morphologies, and redshifts with 12 optical filters
Riguccini, L.; Molino, A.; Pereira, C. B. +142 more
The Southern Photometric Local Universe Survey (S-PLUS) is imaging ∼9300 deg2 of the celestial sphere in 12 optical bands using a dedicated 0.8 m robotic telescope, the T80-South, at the Cerro Tololo Inter-american Observatory, Chile. The telescope is equipped with a 9.2k × 9.2k e2v detector with 10 {µ m} pixels, resulting in a fi…
The Solar Neighborhood. XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc
Henry, Todd J.; Winters, Jennifer G.; Jao, Wei-Chun +6 more
We present results of the largest, most comprehensive study ever done of the stellar multiplicity of the most common stars in the Galaxy, the red dwarfs. We have conducted an all-sky volume-limited survey for stellar companions to 1120 M dwarf primaries known to lie within 25 pc of the Sun via trigonometric parallaxes. In addition to a comprehensi…
The Optical Afterglow of GW170817 at One Year Post-merger
Lyman, J. D.; Fruchter, A. S.; Wiersema, K. +9 more
We present observations of the optical afterglow of GRB 170817A, made by the Hubble Space Telescope, between 2018 February and August, up to one year after the neutron star merger GW170817. The afterglow shows a rapid decline beyond 170 days, and confirms the jet origin for the observed outflow, in contrast to more slowly declining expectations fo…
Measurement and implications of Saturn's gravity field and ring mass
Iess, L.; Tortora, P.; Zannoni, M. +10 more
The interior structure of Saturn, the depth of its winds, and the mass and age of its rings constrain its formation and evolution. In the final phase of the Cassini mission, the spacecraft dived between the planet and its innermost ring, at altitudes of 2600 to 3900 kilometers above the cloud tops. During six of these crossings, a radio link with …
Kinematic detection of a planet carving a gap in a protoplanetary disk
Pinte, C.; Ménard, F.; Duchêne, G. +10 more
We still do not understand how planets form or why extrasolar planetary systems are so different from our own Solar System. However, the past few years have dramatically changed our view of the disks of gas and dust around young stars. Observations with the Atacama Large Millimeter/submillimeter Array and extreme adaptive-optics systems have revea…
The CANDELS/SHARDS Multiwavelength Catalog in GOODS-N: Photometry, Photometric Redshifts, Stellar Masses, Emission-line Fluxes, and Star Formation Rates
Barro, Guillermo; Pérez-González, Pablo G.; Castellano, Marco +52 more
We present a WFC3 F160W (H-band) selected catalog in the CANDELS/GOODS-N field containing photometry from the ultraviolet (UV) to the far-infrared (IR), photometric redshifts, and stellar parameters derived from the analysis of the multiwavelength data. The catalog contains 35,445 sources over the 171 arcmin2 of the CANDELS F160W mosaic…
MMT/MMIRS spectroscopy of z = 1.3 - 2.4 extreme [O III] emitters: implications for galaxies in the reionization era
Charlot, Stéphane; Chevallard, Jacopo; Tang, Mengtao +1 more
Galaxies in the reionization era have been shown to have prominent [O III] + H β emission. Little is known about the gas conditions and radiation field of this population, making it challenging to interpret the spectra emerging at z ≳ 6. Motivated by this shortcoming, we have initiated a large MMT spectroscopic survey identifying rest-frame optica…