Publications (14)
A substantial population of massive quiescent galaxies at z~4 from ZFOURGE
Caroline M. S. Straatman, Ivo Labbé, Lee R. Spitler +21
We report the likely identification of a substantial population of massive M~10^11M_Sun galaxies at z~4 with suppressed star formation rates (SFRs), selected on rest-frame optical…
First Results from Z-FOURGE: Discovery of a Candidate Cluster at z = 2.2 in COSMOS
Lee R. Spitler, Ivo Labbé, Karl Glazebrook +13
We report the first results from the Z-FOURGE survey: the discovery of a candidate galaxy cluster at z = 2.2 consisting of two compact overdensities with red galaxies detected at >…
SPIRITS: Uncovering Unusual Infrared Transients With Spitzer
Mansi M. Kasliwal, John Bally, Frank Masci +44
We present an ongoing, systematic search for extragalactic infrared transients, dubbed SPIRITS --- SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer/IR…
Calibration of the Mid-Infrared Tully-Fisher Relation
Jenny G. Sorce, Helene M. Courtois, R. Brent Tully +7
Distance measures on a coherent scale around the sky are required to address the outstanding cosmological problems of the Hubble Constant and of departures from the mean cosmic flo…
Carnegie Hubble Program: A Mid-Infrared Calibration of the Hubble Constant
Wendy L. Freedman, Barry F. Madore, Victoria Scowcroft +5
Using a mid-infrared calibration of the Cepheid distance scale based on recent observations at 3.6 um with the Spitzer Space Telescope, we have obtained a new, high-accuracy calibr…
The Carnegie Hubble Program
Wendy L. Freedman, Barry F. Madore, Vicky Scowcroft +6
We present an overview of and preliminary results from an ongoing comprehensive program that has a goal of determining the Hubble constant to a systematic accuracy of 2%. As part o…
POKEMON: print optimization for kilo-fiber experiments using micro-optics and nanostructures
Megan Delamer, Suvrath Mahadevan, Chad Bender +7
The most pressing problems in modern astrophysics have often required the largest telescopes. With the cost scaling of mirror diameters, the field as a whole is faced with a challe…
A Preliminary Calibration of the RR Lyrae Period-Luminosity Relation at Mid-Infrared Wavelengths: WISE Data
Barry F. Madore, Douglas Hoffman, Wendy L. Freedman +6
Using time-resolved, mid-infrared data from WISE and geometric parallaxes from HST for four Galactic RR Lyrae variables, we derive the following Population II Period-Luminosity (PL…
The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems
Mark R. Giovinazzi, Cullen H. Blake, Paul Robertson +26
We present a set of companion dynamical masses and orbital parameters of seven star systems from the NEID Earth Twin Survey with significant absolute astrometric accelerations betw…
The Differential Size Growth of Field and Cluster Galaxies at z=2.1 Using the ZFOURGE Survey
Rebecca J. Allen, Glenn G. Kacprzak, Lee R. Spitler +13
There is ongoing debate regarding the extent that environment affects galaxy size growth beyond z>1. To investigate the differences in star-forming and quiescent galaxy properties…
The First Spin-Orbit Obliquity of an M dwarf/brown dwarf System: An eccentric and aligned TOI-2119 b
Lauren Doyle, Caleb I. Cañas, Jessica E. Libby-Roberts +15
We report the first instance of an M dwarf/brown dwarf obliquity measurement for the TOI-2119 system using the Rossiter-McLaughlin effect. TOI-2119 b is a transiting brown dwarf or…
Improving the Thermal Stability of a CCD Through Clocking
Cullen H. Blake, Dan Li, Joseph R. Tufts +6
Modern precise radial velocity spectrometers are designed to infer the existence of planets orbiting other stars by measuring few-nm shifts in the positions of stellar spectral lin…
The Carnegie Hubble Program: The Distance and Structure of the SMC as Revealed by Mid-infrared Observations of Cepheids
Victoria Scowcroft, Wendy L. Freedman, Barry F. Madore +5
Using Spitzer observations of classical Cepheids we have measured the true average distance modulus of the SMC to be mag (corresponding to $6…
The Super-Puff WASP-193b is On A Well-Aligned Orbit
Samuel W. Yee, Gudmundur Stefansson, Daniel Thorngren +8
The "super-puffs" are a population of planets that have masses comparable to that of Neptune but radii similar to Jupiter, leading to extremely low bulk densities ($Ï_p \lesssim 0…