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The Arches Cluster: Extended Structure and Tidal Radius
Matthew W. Hosek, Jessica R. Lu, Jay Anderson +3
At a projected distance of ~26 pc from Sgr A*, the Arches cluster provides insight to star formation in the extreme Galactic Center (GC) environment. Despite its importance, many k…
Discovery of low-metallicity stars in the central parsec of the Milky Way
Tuan Do, Wolfgang Kerzendorf, Nathan Winsor +4
We present a metallicity analysis of 83 late-type giants within the central 1 pc of the Milky Way. K-band spectroscopy of these stars were obtained with the medium-spectral resolut…
HST/WFC3 Observations of an Off-Nuclear Superbubble in Arp 220
Kelly E. Lockhart, Lisa J. Kewley, Jessica R. Lu +9
We present a high spatial resolution optical and infrared study of the circumnuclear region in Arp 220, a late-stage galaxy merger. Narrowband imaging using HST/WFC3 has resolved t…
Radial Trends in IMF-Sensitive Absorption Features in Two Early-Type Galaxies: Evidence for Abundance-Driven Gradients
Nicholas J. McConnell, Jessica R. Lu, Andrew W. Mann
Samples of early-type galaxies show a correlation between stellar velocity dispersion and the stellar initial mass function (IMF) as inferred from gravity-sensitive absorption line…
Thirty Meter Telescope International Observatory Detailed Science Case 2024
Warren Skidmore, Bob Kirshner, David Andersen +168
The Thirty Meter Telescope (TMT) International Observatory (TIO) will be a revolutionary leap forward in astronomical observing capabilities, enabling us to address some of the mos…
Circumstellar discs in Galactic centre clusters: Disc-bearing B-type stars in the Quintuplet and Arches clusters
Andrea Stolte, Benjamin Hussmann, Christoph Olczak +7
We investigate the circumstellar disc fraction as determined from L-band excess observations of the young, massive Arches and Quintuplet clusters residing in the central molecular…