48 citations · 48 across the 4 of their papers we have counts for
5 papers · 1 filter
The low-mass and structured stellar halo of M83 argues against a merger origin for its starburst and extended neutral hydrogen disk
Eric F. Bell, Benjamin Harmsen, Matthew Cosby +12
A merger origin has been suggested for M83's massive, metal-rich extended HI disk and nuclear starburst. We observe M83's stellar halo to test this idea. We train nearest-neighbor…
Constraints on the fractional changes of the fundamental constants at a look-back time of 2.5 Myrs
Renzhi Su, Tao An, Stephen J. Curran +3
The quantum nature of gravity remains one of the greatest mysteries of modern physics, with many unified theories predicting variations in fundamental constants across space and ti…
First Extragalactic Detection of Thermal Hydroxyl (OH) 18cm Emission in M31 Reveals Abundant CO-faint Molecular Gas
Michael P. Busch
The most abundant interstellar molecule, molecular Hydrogen (H), is practically invisible in cold molecular clouds. Astronomers typically use carbon monoxide (CO) to trace th…
Observational Evidence for a Thick Disk of Dark Molecular Gas in the Outer Galaxy
Michael P. Busch, Philip D. Engelke, Ronald J. Allen +1
We present the serendipitous discovery of an extremely broad ( km/s), faint (), and ubiquitous 1667 and 1665 MHz ground-state thermal OH…
The Structure of Dark Molecular Gas in the Galaxy -- II. Physical State of "CO-Dark" Gas in the Perseus Arm
Michael P. Busch, Ronald J. Allen, Philip D. Engelke +3
We report the results from a new, highly sensitive (mK) survey for thermal OH emission at 1665 and 1667 MHz over a dense, 9 x 9-pixel grid covering a x p…