Search Publications
The Emergence of a Brightest Cluster Galaxy in a Protocluster Core at z = 2.24
Teplitz, Harry I.; Fan, Xiaohui; Cai, Zheng +4 more
We report the detection of a pair of massive quiescent galaxies likely in the process of merging at the center of the spectroscopically confirmed, extremely massive protocluster BOSS1244 at z = 2.24 ± 0.02. These galaxies, BOSS1244-QG1 and BOSS1244-QG2, were detected with Hubble Space Telescope grism slitless spectroscopic observations. These two …
Dust Polarization of Prestellar and Protostellar Sources in OMC-3
Tomisaka, Kohji; Sato, Asako; Ho, Paul T. P. +5 more
We present the Atacama Large Millimeter/submillimeter Array observations of linearly polarized 1.1 mm continuum emission at ∼0.″14 (55 au) resolution and CO (J = 2‑1) emission at ∼1.″5 (590 au) resolution toward one prestellar (MMS 4), four Class 0 (MMS 1, MMS 3, MMS 5, and MMS 6), one Class I (MMS 7), and one flat-spectrum (MMS 2) sources in the …
Measurements of the Low-acceleration Gravitational Anomaly from the Normalized Velocity Profile of Gaia Wide Binary Stars and Statistical Testing of Newtonian and Milgromian Theories
Chae, Kyu-Hyun
Low-acceleration gravitational anomaly is investigated with a new method of exploiting the normalized velocity profile
PEARLS: A Potentially Isolated Quiescent Dwarf Galaxy with a Tip of the Red Giant Branch Distance of 30 Mpc
Grogin, Norman A.; Holwerda, Benne W.; Koekemoer, Anton M. +25 more
A wealth of observations have long suggested that the vast majority of isolated classical dwarf galaxies (M * = 107–109 M ⊙) are currently star forming. However, recent observations of the large abundance of "ultra-diffuse galaxies" beyond the reach of previous large spectroscopic surveys suggest that ou…
Strong He I Emission Lines in High N/O Galaxies at z ∼ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +14 more
We present He I/Hβ flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ∼ 6 mostly with the spectroscopic coverage from He I λ4471 and He II λ4686 to He I λ7065, and comparing with 68 local dwarf galaxies. We find that these …
CMZoom. IV. Incipient High-mass Star Formation throughout the Central Molecular Zone
Ho, Luis C.; Ott, Jürgen; Lu, Xing +15 more
In this work, we constrain the star-forming properties of all possible sites of incipient high-mass star formation in the Milky Way's Galactic Center. We identify dense structures using the CMZoom 1.3 mm dust continuum catalog of objects with typical radii of ∼0.1 pc, and measure their association with tracers of high-mass star formation. We incor…
Impacts of Bar-driven Shear and Shocks on Star Formation
Park, Myeong-Gu; Fragkoudi, Francesca; van de Ven, Glenn +12 more
Bars drive gas inflow. As the gas flows inward, shocks and shear occur along the bar dust lanes. Such shocks and shear can affect the star formation (SF) and change the gas properties. For four barred galaxies, we present Hα velocity gradient maps that highlight bar-driven shocks and shear using data from the PHANGS-MUSE and PHANGS-ALMA surveys, w…
Retrieval of Thermally Resolved Water Vapor Distributions in Disks Observed with JWST-MIRI
Banzatti, Andrea; Wilner, David J.; Andrews, Sean M. +13 more
The mid-infrared water vapor emission spectrum provides a novel way to characterize the delivery of icy pebbles toward the innermost (<5 au) regions of planet-forming disks. Recently, JWST MIRI-MRS showed that compact disks exhibit an excess of low-energy water vapor emission relative to extended multigapped disks, suggesting that icy pebble dr…
tdescore: An Accurate Photometric Classifier for Tidal Disruption Events
Rusholme, Ben; Sollerman, Jesper; van Velzen, Sjoert +12 more
Optical surveys have become increasingly adept at identifying candidate tidal disruption events (TDEs) in large numbers, but classifying these generally requires extensive spectroscopic resources. Here we present tdescore, a simple binary photometric classifier that is trained using a systematic census of ∼3000 nuclear transients from the Zwicky T…
Flaring Stars in a Nontargeted Millimeter-wave Survey with SPT-3G
Ade, P. A. R.; Benabed, K.; Bouchet, F. R. +96 more
We present a flare star catalog from 4 yr of nontargeted millimeter-wave survey data from the South Pole Telescope (SPT). The data were taken with the SPT-3G camera and cover a 1500 deg2 region of the sky from 20h40m0s to 3h20m0s in right ascension and from ‑42° to ‑70° i…