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17 papers
Tracing Interstellar Gas in Quiescent Galaxies Using Na I D and Ca II H&K Absorption
Arian Moghni, Timothy M. Heckman, Namrata Roy +3
For over two decades, Na I D ( Å) absorption has been the primary optical tracer of cool, neutral gas in galaxies. In contrast, Ca II H&K (3934.78, 39…
MSA-3D: A Diversity of Dust Attenuation Profiles Across the Epoch of Thin Disk Emergence
Ivana Barišić, Tucker Jones, Naveen Reddy +13
We present spatially resolved measurements of dust attenuation and star formation in 18 main-sequence star-forming galaxies at z1 from the MSA-3D survey, obtained by mapping…
New Measurements of Distances to Galaxies in the NGC 1052 Field with the Hubble and James Webb Space Telescopes: Testing the Bullet-Dwarf Origin of the Trail
Yimeng Tang, Gagandeep S. Anand, Aaron J. Romanowsky +2
NGC 1052-DF2 and DF4 are two ultra-diffuse galaxies deficient in dark matter (DM), and reported as part of a remarkable linear trail of dwarf galaxies in the NGC 1052 field. Recent…
Galactic Rain: Cool Gas Inflows in Red Geyser Galaxies and Their Connection to AGN Activity and Interactions
Arian Moghni, Namrata Roy, Timothy M. Heckman +3
Red geysers are a population of massive (log[M/M]~10.5), quiescent galaxies that exhibit large-scale but weak, bi-symmetric ionized gas outflows, interpreted as signatures…
MSA-3D: Connecting the Chemical and Kinematic Structures of Galaxies at
Mengting Ju, Xin Wang, Tucker Jones +12
We investigate the connection between ionized gas kinematics and gas-phase metallicity gradients in 21 star-forming galaxies at from the MSA-3D survey, using spatia…
MSA-3D: Uncovering Weak AGNs and Resolved Outflows in Disguise in Star-Forming Galaxies
Namrata Roy, Alaina Henry, Tucker Jones +11
We present spatially resolved rest-optical spectroscopy of 38 star-forming galaxies at 0.5 < z < 1.7 from the JWST/NIRSpec MSA-3D survey, which uses slit-stepping to build IFU-like…
Morphology and stellar populations of a candidate ultra-diffuse galaxy in early Euclid and Rubin imaging
Aaron J. Romanowsky, Yimeng Tang, Kevin A. Bundy
We present multi-wavelength imaging and analysis of a low surface brightness (LSB) dwarf galaxy in the Extended Chandra Deep Field South (ECDFS), SMDG0333094-280938, with particula…
An Unexplained Origin for the Unusual Globular Cluster System in the Ultra-diffuse Galaxy FCC 224
Yimeng Tang, Aaron J. Romanowsky, Jonah S. Gannon +9
We study the quiescent ultra-diffuse galaxy FCC 224 in the Fornax cluster using Hubble Space Telescope (HST) imaging, motivated by peculiar properties of its globular cluster (GC)…
Testing the Bullet Dwarf Collision Scenario in the NGC 1052 Group Through Morphologies and Stellar Populations
Yimeng Tang, Aaron J. Romanowsky, Pieter G. van Dokkum +8
NGC 1052-DF2 and -DF4 are two ultra-diffuse galaxies that have been reported as deficient in dark matter and associated with the same galaxy group. Recent findings suggest that DF2…
MSA-3D: Metallicity Gradients in Galaxies at with JWST/NIRSpec Slit-stepping Spectroscopy
Mengting Ju, Xin Wang, Tucker Jones +14
The radial gradient of gas-phase metallicity is a powerful probe of the chemical and structural evolution of star-forming galaxies, closely tied to disk formation and gas kinematic…
SDSS-IV MaNGA: Stellar rotational support in disk galaxies vs. central surface density and stellar population age
Xiaohan Wang, Yifei Luo, S. M. Faber +10
We investigate how the stellar rotational support changes as a function of spatially resolved stellar population age () and relative central stellar surface density ($…
MSA-3D: dissecting galaxies at z~1 with high spatial and spectral resolution
Ivana Barišić, Tucker Jones, Kris Mortensen +18
Integral field spectroscopy (IFS) is a powerful tool for understanding the formation of galaxies across cosmic history. We present the observing strategy and first results of MSA-3…
The Strength of Bisymmetric Modes in SDSS-IV/MaNGA Barred Galaxy Kinematics
Brian DiGiorgio Zanger, Kyle B. Westfall, Kevin Bundy +7
The SDSS-IV/MaNGA Survey data provide an unprecedented opportunity to study the internal motions of galaxies and, in particular, represent the largest sample of barred galaxy kinem…
FOBOS: A Next-Generation Spectroscopic Facility at the W. M. Keck Observatory
K. Bundy, K. Westfall, N. MacDonald +38
High-multiplex and deep spectroscopic follow-up of upcoming panoramic deep-imaging surveys like LSST, Euclid, and WFIRST is a widely recognized and increasingly urgent necessity. N…
Ground Layer Adaptive Optics for the W. M. Keck Observatory: Feasibility Study
J. R. Lu, M. Chun, S. M. Ammons +12
Ground-layer adaptive optics (GLAO) systems offer the possibility of improving the "seeing" of large ground-based telescopes and increasing the efficiency and sensitivity of observ…
The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
H. Aihara, N. Arimoto, R. Armstrong +139
Hyper Suprime-Cam (HSC) is a wide-field imaging camera on the prime focus of the 8.2m Subaru telescope on the summit of Maunakea in Hawaii. A team of scientists from Japan, Taiwan…
The Sloan Lens ACS Survey. IX. Colors, Lensing and Stellar Masses of Early-type Galaxies
M. W. Auger, T. Treu, A. S. Bolton +5
We present the current photometric dataset for the Sloan Lens ACS (SLACS) Survey, including HST photometry from ACS, WFPC2, and NICMOS. These data have enabled the confirmation of…