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The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
Strauss, Michael A.; Takita, Satoshi; Miyatake, Hironao +15 more
We present the galaxy shear catalog that will be used for the three-year cosmological weak gravitational lensing analyses using data from the Wide layer of the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) Survey. The galaxy shapes are measured from the i-band imaging data acquired from 2014 to 2019 and calibrated with image simulations t…
Has JWST Already Falsified Dark-matter-driven Galaxy Formation?
Kroupa, Pavel; Haslbauer, Moritz; Haghi, Hosein +1 more
The James Webb Space Telescope (JWST) discovered several luminous high-redshift galaxy candidates with stellar masses of M * ≳ 109 M ⊙ at photometric redshifts z phot ≳ 10, which allows to constrain galaxy and structure formation models. For example, Adams et al. identified the candidate ID 1514 with ${\…
CORINOS. I. JWST/MIRI Spectroscopy and Imaging of a Class 0 Protostar IRAS 15398–3359
Lee, Jeong-Eun; Cleeves, L. Ilsedore; Bergner, Jennifer B. +13 more
The origin of complex organic molecules (COMs) in young Class 0 protostars has been one of the major questions in astrochemistry and star formation. While COMs are thought to form on icy dust grains via gas-grain chemistry, observational constraints on their formation pathways have been limited to gas-phase detection. Sensitive mid-infrared spectr…
The eccentricity distribution of wide binaries and their individual measurements
Ting, Yuan-Sen; Zakamska, Nadia L.; Hwang, Hsiang-Chih
Eccentricity of wide binaries is difficult to measure due to their long orbital periods. With Gaia's high-precision astrometric measurements, eccentricity of a wide binary can be constrained by the angle between the separation vector and the relative velocity vector (the v-r angle). In this paper, by using the v-r angles of wide binaries in Gaia E…
The Type Icn SN 2021csp: Implications for the Origins of the Fastest Supernovae and the Fates of Wolf-Rayet Stars
Kulkarni, S. R.; Filippenko, Alexei V.; Duev, Dmitry A. +32 more
We present observations of SN 2021csp, the second example of a newly identified type of supernova (SN) hallmarked by strong, narrow, P Cygni carbon features at early times (Type Icn). The SN appears as a fast and luminous blue transient at early times, reaching a peak absolute magnitude of -20 within 3 days due to strong interaction between fast S…
Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. II. Elemental Abundances
Shi, Jianrong; Zhao, Gang; Chen, Yuqin +9 more
We present homogeneous abundance analysis of over 20 elements for 385 very metal-poor (VMP) stars based on the LAMOST survey and follow-up observations with the Subaru Telescope. It is the largest high-resolution VMP sample (including 363 new objects) studied by a single program, and the first attempt to accurately determine evolutionary stages fo…
The Low-Redshift Lyman Continuum Survey. Unveiling the ISM properties of low-z Lyman-continuum emitters
Giavalisco, Mauro; Grazian, Andrea; Pentericci, Laura +24 more
Aims: Combining 66 ultraviolet (UV) spectra and ancillary data from the recent Low-Redshift Lyman Continuum Survey (LzLCS) and 23 LyC observations by earlier studies, we form a statistical sample of star-forming galaxies at z ∼ 0.2 − 0.4 with which we study the role of cold interstellar medium (ISM) gas in the leakage of ionizing radiation. W…
Five Key Exoplanet Questions Answered via the Analysis of 25 Hot-Jupiter Atmospheres in Eclipse
Tsiaras, A.; Waldmann, I. P.; Tinetti, G. +11 more
Population studies of exoplanets are key to unlocking their statistical properties. So far, the inferred properties have been mostly limited to planetary, orbital, and stellar parameters extracted from, e.g., Kepler, radial velocity, and Gaia data. More recently an increasing number of exoplanet atmospheres have been observed in detail from space …
Probing inner and outer disk misalignments in transition disks. Constraints from VLTI/GRAVITY and ALMA observations
Ménard, F.; Henning, T.; Ginski, C. +16 more
Context. Transition disks are protoplanetary disks with dust-depleted cavities, possibly indicating substantial clearing of their dust content by a massive companion. For several known transition disks, dark regions interpreted as shadows have been observed in scattered light imaging and are hypothesized to originate from misalignments between dis…
A rich population of free-floating planets in the Upper Scorpius young stellar association
Tamura, Motohide; Cuillandre, Jean-Charles; Bertin, Emmanuel +9 more
The nature and origin of free-floating planets (FFPs) are still largely unconstrained because of a lack of large homogeneous samples to enable a statistical analysis of their properties. So far, most FFPs have been discovered using indirect methods; microlensing surveys have proved particularly successful to detect these objects down to a few Eart…