Search Publications
Detection of Dust in High-velocity Cloud Complex C-Enriched Gas Accreting onto the Milky Way
Richter, Philipp; Kriss, Gerard A.; Fox, Andrew J. +4 more
We present the detection of dust depletion in Complex C, a massive, infalling, low-metallicity high-velocity cloud in the northern Galactic hemisphere that traces the ongoing accretion of gas onto the Milky Way. We analyze a very high signal-to-noise Hubble Space Telescope Cosmic Origins Spectrograph spectrum of active galactic nucleus (AGN) Mrk 8…
Probing the Galactic Diffuse Continuum Emission with COSI
Boggs, Steven E.; Tomsick, John A.; Siegert, Thomas +10 more
In 2016, the Compton Spectrometer and Imager (COSI) had a successful 46 day flight on board NASA's Super Pressure Balloon platform. In this work, we report measurements of the Galactic diffuse continuum emission (GDCE) observed toward the inner Galaxy during the flight, which in the COSI energy band (0.2-5 MeV) is primarily generated from inverse …
Geometry and Kinematics of a Dancing Milky Way: Unveiling the Precession and Inclination Variation across the Galactic Plane via Open Clusters
He, Zhihong
This Letter presents a study of the geometry and motion of the Galactic disk using open clusters in the Gaia era. The findings suggest that the inclination θ i of the Galactic disk increases gradually from the inner to the outer disk, with a shift in orientation at the Galactocentric radius of approximately 6 ± 1 kpc. Furthermore, thi…
Early Results from GLASS-JWST. XX. Unveiling a Population of "Red Excess" Galaxies in Abell2744 and in the Coeval Field
Santini, Paola; Calabrò, Antonello; Castellano, Marco +26 more
We combine JWST/NIRCam imaging and MUSE data to characterize the properties of galaxies in different environmental conditions in the cluster Abell2744 (z = 0.3064) and in its immediate surroundings. We investigate how galaxy colors, morphology, and star-forming fractions depend on wavelength and on different parameterizations of environment. Our m…
A Reexamination of Phosphorus and Chlorine Depletions in the Diffuse Interstellar Medium
Ritchey, Adam M.; Federman, S. R.; Brown, J. M. +1 more
We present a comprehensive examination of interstellar P and Cl abundances based on an analysis of archival spectra acquired with the Space Telescope Imaging Spectrograph of the Hubble Space Telescope and the Far Ultraviolet Spectroscopic Explorer. Column densities of P II, Cl I, and Cl II are determined for a combined sample of 107 sight lines pr…
Retrospective Search for Strongly Lensed Supernovae in the DESI Legacy Imaging Surveys
Schlegel, David J.; Huang, Xiaosheng; Suzuki, Nao +3 more
The introduction of deep wide-field surveys in recent years and the adoption of machine-learning techniques have led to the discoveries of ${ \mathcal O }({10}^{4})$ strong gravitational lensing systems and candidates. However, the discovery of multiply-lensed transients remains a rarity. Lensed transients and especially lensed supernovae are inva…
Deciphering Solar Coronal Heating: Energizing Small-scale Loops through Surface Convection
Madjarska, M. S.; Rouppe van der Voort, L.; Joshi, R. +4 more
The solar atmosphere is filled with clusters of hot small-scale loops commonly known as coronal bright points (CBPs). These ubiquitous structures stand out in the Sun by their strong X-ray and/or extreme-ultraviolet (EUV) emission for hours to days, which makes them a crucial piece when solving the solar coronal heating puzzle. In addition, they c…
Pointlike Sources among z > 11 Galaxy Candidates: Contaminants due to Supernovae at High Redshifts?
Yan, Haojing; Wang, Lifan; Ma, Zhiyuan +1 more
The recent searches for z > 11 galaxies using the James Webb Space Telescope have resulted in an unexpectedly high number of candidate objects, which imply at least 1 order of magnitude higher number density of z > 11 galaxies than the previously favored predictions. A question has risen whether there are some new types of contaminants among…
Fleeting Small-scale Surface Magnetic Fields Build the Quiet-Sun Corona
Woch, J.; Peter, H.; Chitta, L. P. +19 more
Arch-like loop structures filled with million Kelvin hot plasma form the building blocks of the quiet-Sun corona. Both high-resolution observations and magnetoconvection simulations show the ubiquitous presence of magnetic fields on the solar surface on small spatial scales of ~100 km. However, the question of how exactly these quiet-Sun coronal l…
Varstrometry for Off-nucleus and Dual Subkiloparsec AGN (VODKA). SDSS J1608+2716: A Subarcsecond Quadruply Lensed Quasar at z = 2.575
Shen, Yue; Oguri, Masamune; Zakamska, Nadia L. +5 more
We report Hubble Space Telescope (HST) Wide Field Camera 3 deep IR (F160W) imaging of SDSS J1608+2716. This system, located at a redshift of z = 2.575, was recently reported as a triple-quasar candidate with subarcsecond separations (~0.″25) based on selection from Gaia astrometry and follow-up Keck adaptive optics-assisted integral field unit spe…