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A Highly Settled Disk around Oph163131
Pinte, C.; Ménard, F.; Duchêne, G. +10 more
High dust density in the midplane of protoplanetary disks is favorable for efficient grain growth and can allow fast formation of planetesimals and planets, before disks dissipate. Vertical settling and dust trapping in pressure maxima are two mechanisms allowing dust to concentrate in geometrically thin and high-density regions. In this work, we …
The Poor Old Heart of the Milky Way
Xiang, Maosheng; Conroy, Charlie; Hogg, David W. +9 more
Our Milky Way should host an ancient, metal-poor, and centrally concentrated stellar population, which reflects the star formation and enrichment in the few most massive progenitors that coalesced at high redshift to form the proto-Galaxy. While metal-poor stars are known to reside in the inner few kiloparsecs of our Galaxy, current data do not ye…
Hunting for open clusters in Gaia EDR3: 628 new open clusters found with OCfinder
Castro-Ginard, A.; Jordi, C.; Luri, X. +6 more
Context. The improvements in the precision of the published data in Gaia EDR3 with respect to Gaia DR2, particularly for parallaxes and proper motions, offer the opportunity to increase the number of known open clusters in the Milky Way by detecting farther and fainter objects that have thus far gone unnoticed.
Aims: Our aim is to continue to…
Proper Motions, Orbits, and Tidal Influences of Milky Way Dwarf Spheroidal Galaxies
Erkal, Denis; Li, Ting S.; Pace, Andrew B.
We combine Gaia early data release 3 astrometry with accurate photometry and utilize a probabilistic mixture model to measure the systemic proper motion of 52 dwarf spheroidal (dSph) satellite galaxies of the Milky Way (MW). For the 46 dSphs with literature line-of-sight velocities we compute orbits in both a MW and a combined MW + Large Magellani…
Short GRB Host Galaxies. I. Photometric and Spectroscopic Catalogs, Host Associations, and Galactocentric Offsets
Kilpatrick, Charles D.; Smith, Nathan; Andrews, Jennifer +25 more
We present a comprehensive optical and near-infrared census of the fields of 90 short gamma-ray bursts (GRBs) discovered in 2005-2021, constituting all short GRBs for which host galaxy associations are feasible (≈60% of the total Swift short GRB population). We contribute 274 new multi-band imaging observations across 58 distinct GRBs and 26 spect…
Searching for Extremely Blue UV Continuum Slopes at z = 7-11 in JWST/NIRCam Imaging: Implications for Stellar Metallicity and Ionizing Photon Escape in Early Galaxies
Charlot, Stéphane; Chen, Zuyi; Stark, Daniel P. +4 more
The ultraviolet (UV) continuum slope (β, where f λ ∝ λ β ) of galaxies is sensitive to a variety of properties, from the metallicity and age of the stellar population to dust attenuation throughout the galaxy. Considerable attention has focused on identifying reionization-era galaxies with very blue UV slopes (β < -3). …
Comparing Tip of the Red Giant Branch Distance Scales: An Independent Reduction of the Carnegie-Chicago Hubble Program and the Value of the Hubble Constant
Riess, Adam G.; Yuan, Wenlong; Anand, Gagandeep S. +2 more
The tip of the red giant branch has been used to measure distances to 500 nearby galaxies with the Hubble Space Telescope (HST) which are available in the Color-Magnitude Diagrams and Tip of the Red Giant Branch (CMDs/TRGB) catalog on the Extragalactic Distance Database (EDD). Our established methods are employed to perform an independent reductio…
z 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover
Bouwens, R. J.; Oesch, P.; Illingworth, G. +2 more
We present new determinations of the rest-UV luminosity functions (LFs) at z = 2-9 to extremely low luminosities (>-14 mag) from a sample of >2500 lensed galaxies found behind the Hubble Frontier Fields (HFF) clusters. For the first time, we present faint-end slope results from lensed samples that are fully consistent with blank-field result…
The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age
Owen, James E.; Howard, Andrew W.; Petigura, Erik A. +10 more
In 2017, the California-Kepler Survey (CKS) published its first data release (DR1) of high-resolution optical spectra of 1305 planet hosts. Refined CKS planet radii revealed that small planets are bifurcated into two distinct populations, super-Earths (smaller than 1.5 R ⊕) and sub-Neptunes (between 2.0 and 4.0 R ⊕), with few…
A Search for H-Dropout Lyman Break Galaxies at z 12-16
Koekemoer, Anton M.; Yung, L. Y. Aaron; Harikane, Yuichi +11 more
We present two bright galaxy candidates at z ~ 12-13 identified in our H-dropout Lyman break selection with 2.3 deg2 near-infrared deep imaging data. These galaxy candidates, selected after careful screening of foreground interlopers, have spectral energy distributions showing a sharp discontinuity around 1.7 µm, a flat continuum …