Search Publications
On the Origins of Extreme Velocity Stars as Revealed by Large-scale Galactic Surveys
Huang, Yang; Beers, Timothy C.; Zhang, Hua-Wei +3 more
We assemble a large sample of 12,784 high-velocity stars with total velocity V GSR ≥ 300 km s-1, selected from RAVE DR5, SDSS DR12, LAMOST DR8, APOGEE DR16, GALAH DR2, and Gaia EDR3. In this sample, 52 are marginally hypervelocity star (HVS) candidates that have V GSR exceeding their local escape velocities within …
A Mixture of LBG Overdensities in the Fields of Three 6 < z < 7 Quasars: Implications for the Robustness of Photometric Selection
Finkelstein, Steven L.; Casey, Caitlin M.; Larson, Rebecca L. +5 more
The most luminous quasars at z > 6 are suspected to be both highly clustered and to reside in the most massive dark matter halos in the early universe, making them prime targets to search for galaxy overdensities and/or protoclusters. We search for Lyman-break dropout-selected galaxies using HST WFC3/ACS broadband imaging in the fields of three…
Minutes-duration optical flares with supernova luminosities
Filippenko, Alexei V.; de Boer, Thomas; Magnier, Eugene A. +74 more
In recent years, certain luminous extragalactic optical transients have been observed to last only a few days1. Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae), whose timescale is weeks2. Some short-duration transients, most notably AT201…
Massive galaxy formation caught in action at z ∼ 5 with JWST
Greve, Thomas R.; Brammer, Gabriel B.; Toft, Sune +13 more
We report the discovery of a compact group of galaxies, CGG-z5, at z ∼ 5.2 in the EGS field covered by the JWST/CEERS survey. CGG-z5 was selected as the highest overdensity of galaxies at z > 2 in recent JWST public surveys and it consists of six candidate members lying within a projected area of 1.5″ × 3″ (10×20 kpc2). All group mem…
Moving groups across Galactocentric radius with Gaia DR3
Aguerri, J. Alfonso L.; D'Onghia, Elena; Lucchini, Scott +1 more
The kinematic plane of stars near the Sun has proven an indispensable tool for untangling the complexities of the structure of our Milky Way (MW). With ever improving data, numerous kinematic 'moving groups' of stars have been better characterized, and new ones continue to be discovered. Here we present an improved method for detecting these group…
Determining Dust Properties in Protoplanetary Disks: SED-derived Masses and Settling with ALMA
Ribas, Álvaro; Espaillat, Catherine C.; Macías, Enrique +3 more
We present spectral energy distribution (SED) modeling of 338 disks around T Tauri stars from 11 star-forming regions, ranging from ~0.5 to 10 Myr old. The disk masses we infer from our SED models are typically greater than those reported from (sub)millimeter surveys by a factor of 1.5-5, with the discrepancy being generally higher for the more ma…
The early evolution of young massive clusters. The kinematic history of NGC 6611/M16
Kaper, L.; de Koter, A.; Lamers, H. J. G. L. M. +3 more
Context. Young massive clusters provide the opportunity to study the outcome of the star formation process and the early evolution of star clusters. In the first few million years, the (massive) stars dynamically interact, producing runaways and affecting the initial (binary) population.
Aims: Observing and interpreting the dynamics of young …
Kinematics, Structure, and Mass Outflow Rates of Extreme Starburst Galactic Outflows
Moustakas, John; Coil, Alison L.; Rudnick, Gregory H. +10 more
We present results on the properties of extreme gas outflows in massive (M * ~ 1011 M ⊙), compact, starburst (star formation rate, SFR~ 200 M ⊙ yr-1) galaxies at z = 0.4-0.7 with very high star formation surface densities (ΣSFR ~ 2000 M ⊙ yr-1 kpc-2)…
The HETDEX Survey Emission-line Exploration and Source Classification
Finkelstein, Steven L.; Kollatschny, Wolfram; Gebhardt, Karl +20 more
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an untargeted spectroscopic survey that aims to measure the expansion rate of the universe at z ~ 2.4 to 1% precision for both H(z) and D A (z). HETDEX is in the process of mapping in excess of one million Lyα emitting (LAE) galaxies and a similar number of lower-z galaxies …
New ASKAP radio supernova remnants and candidates in the Large Magellanic Cloud
Haberl, F.; Hill, T.; Payne, J. L. +34 more
We present a new Australian Square Kilometre Array Pathfinder (ASKAP) sample of 14 radio supernova remnants (SNR) candidates in the Large Magellanic Cloud (LMC). This new sample is a significant increase to the known number of older, larger, and low surface brightness LMC SNRs. We employ a multifrequency search for each object and found possible t…