Search Publications
Detection of the Far-infrared [O III] and Dust Emission in a Galaxy at Redshift 8.312: Early Metal Enrichment in the Heart of the Reionization Era
Shibuya, Takatoshi; Inoue, Akio K.; Hashimoto, Takuya +19 more
We present the Atacama Large Millimeter/submillimeter Array detection of the [O III] 88 µm line and rest-frame 90 µm dust continuum emission in a Y-dropout Lyman break galaxy (LBG), MACS0416_Y1 lying behind the Frontier Field cluster MACS J0416.1-2403. This [O III] detection confirms the LBG with a spectroscopic redshift of z = 8.3118 …
Untangling the Galaxy. I. Local Structure and Star Formation History of the Milky Way
Kounkel, Marina; Covey, Kevin
Gaia DR2 provides unprecedented precision in measurements of the distance and kinematics of stars in the solar neighborhood. Through applying unsupervised machine learning on DR2's 5D data set (3D position + 2D velocity), we identify a number of clusters, associations, and comoving groups within 1 kpc and | b| < 30^\circ (many of which have not…
Observation of inverse Compton emission from a long γ-ray burst
Maraschi, L.; Troja, E.; Piro, L. +304 more
Long-duration γ-ray bursts (GRBs) originate from ultra-relativistic jets launched from the collapsing cores of dying massive stars. They are characterized by an initial phase of bright and highly variable radiation in the kiloelectronvolt-to-megaelectronvolt band, which is probably produced within the jet and lasts from milliseconds to minutes, kn…
Occurrence Rates of Planets Orbiting FGK Stars: Combining Kepler DR25, Gaia DR2, and Bayesian Inference
Ford, Eric B.; Ragozzine, Darin; Hsu, Danley C. +1 more
We characterize the occurrence rate of planets, ranging in size from 0.5 to 16 R ⊕, orbiting FGK stars with orbital periods from 0.5 to 500 days. Our analysis is based on results from the “DR25” catalog of planet candidates produced by NASA’s Kepler mission and stellar radii from Gaia “DR2.” We incorporate additional Kepler data product…
Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud
Pascucci, Ilaria; Edwards, Suzan; Banzatti, Andrea +24 more
We present a high-resolution (∼0.″12, ∼16 au, mean sensitivity of 50 µJy beam-1 at 225 GHz) snapshot survey of 32 protoplanetary disks around young stars with spectral type earlier than M3 in the Taurus star-forming region using the Atacama Large Millimeter Array. This sample includes most mid-infrared excess members that were not…
Clusters of Primordial Black Holes
Belotsky, Konstantin M.; Dokuchaev, Vyacheslav I.; Eroshenko, Yury N. +7 more
The Primordial Black Holes (PBHs) are a well-established probe for new physics in the very early Universe. We discuss here the possibility of PBH agglomeration into clusters that may have several prominent observable features. The clusters can form due to closed domain walls appearance in the natural and hybrid inflation models whose subsequent ev…
Dark Energy Survey year 1 results: Constraints on extended cosmological models from galaxy clustering and weak lensing
Bechtol, K.; Smith, M.; Nichol, R. C. +112 more
We present constraints on extensions of the minimal cosmological models dominated by dark matter and dark energy, Λ CDM and w CDM , by using a combined analysis of galaxy clustering and weak gravitational lensing from the first-year data of the Dark Energy Survey (DES Y1) in combination with external data. We consider four extensions of the minima…
Dynamical heating across the Milky Way disc using APOGEE and Gaia
Bovy, Jo; Chaplin, William J.; Cunha, Katia +14 more
The kinematics of the Milky Way disc as a function of age are well measured at the solar radius, but have not been studied over a wider range of Galactocentric radii. Here, we measure the kinematics of mono-age, mono-[Fe/H] populations in the low and high [α/Fe] discs between 4 ≲ R ≲ 13 kpc and |z| ≲ 2 kpc using 65 719 stars in common between APOG…
The Ophiuchus DIsc Survey Employing ALMA (ODISEA) - I: project description and continuum images at 28 au resolution
Ansdell, Megan; Gonzalez-Ruilova, Camilo; Cieza, Lucas A. +20 more
We introduce the Ophiuchus DIsc Survey Employing ALMA (ODISEA), a project aiming to study the entire population of Spitzer-selected protoplanetary discs in the Ophiuchus Molecular Cloud (∼300 objects) from both millimetre continuum and CO isotopologues data. Here we present 1.3 mm/230 GHz continuum images of 147 targets at 0.2 arcsec (28 au) resol…
Pulsating white dwarfs: new insights
Kepler, S. O.; Córsico, Alejandro H.; Althaus, Leandro G. +1 more
Stars are extremely important astronomical objects that constitute the pillars on which the Universe is built, and as such, their study has gained increasing interest over the years. White dwarf stars are not the exception. Indeed, these stars constitute the final evolutionary stage for more than 95% of all stars. The Galactic population of white …