Search Publications
Testing White Dwarf Age Estimates Using Wide Double White Dwarf Binaries from Gaia EDR3
Hermes, J. J.; van Saders, Jennifer L.; El-Badry, Kareem +4 more
White dwarf (WD) stars evolve simply and predictably, making them reliable age indicators. However, self-consistent validation of the methods for determining WD total ages has yet to be widely performed. This work uses 1565 wide (>100 au) WD+WD binaries and 24 new triples containing at least two WDs to test the accuracy and validity of WD total…
Rotation Distributions around the Kraft Break with TESS and Kepler: The Influences of Age, Metallicity, and Binarity
Pan, Kaike; van Saders, Jennifer L.; Claytor, Zachary R. +6 more
Stellar rotation is a complex function of mass, metallicity, and age and can be altered by binarity. To understand the importance of these parameters in main-sequence stars, we have assembled a sample of observations that spans a range of these parameters using a combination of observations from The Transiting Exoplanet Survey Satellite (TESS) and…
The ELM Survey. IX. A Complete Sample of Low-mass White Dwarf Binaries in the SDSS Footprint
Gianninas, A.; Kilic, Mukremin; Kosakowski, Alekzander +1 more
We present the discovery of 17 double white dwarf (WD) binaries from our ongoing search for extremely low mass (ELM) < 0.3 M ⊙ WDs, objects that form from binary evolution. Gaia parallax provides a new means of target selection that we use to evaluate our original ELM Survey selection criteria. Cross-matching the Gaia and Sloan Digit…
The Gas-Star Formation Cycle in Nearby Star-forming Galaxies. II. Resolved Distributions of CO and Hα Emission for 49 PHANGS Galaxies
Kruijssen, J. M. Diederik; Rosolowsky, Erik; Chevance, Mélanie +36 more
The relative distribution of molecular gas and star formation in galaxies gives insight into the physical processes and timescales of the cycle between gas and stars. In this work, we track the relative spatial configuration of CO and Hα emission at high resolution in each of our galaxy targets and use these measurements to quantify the distributi…
A Bayesian Population Model for the Observed Dust Attenuation in Galaxies
Foreman-Mackey, Daniel; Leja, Joel; Hayward, Christopher C. +2 more
Dust plays a pivotal role in determining the observed spectral energy distribution (SED) of galaxies. Yet our understanding of dust attenuation is limited and our observations suffer from the dust-metallicity-age degeneracy in SED fitting (single galaxies), large individual variances (ensemble measurements), and the difficulty in properly dealing …
The Connection Between Galactic Outflows and the Escape of Ionizing Photons
Chisholm, John; Rigby, Jane R.; Bayliss, Matthew +13 more
We analyze spectra of a gravitationally lensed galaxy, known as the Sunburst Arc, that is leaking ionizing photons, also known as the Lyman continuum (LyC). Magnification from gravitational lensing permits the galaxy to be spatially resolved into one region that leaks ionizing photons and several that do not. Rest-frame UV and optical spectra from…
Diagnosing DASH: A Catalog of Structural Properties for the COSMOS-DASH Survey
van Dokkum, Pieter G.; Franx, Marijn; Muzzin, Adam +16 more
We present the H 160 morphological catalogs for the COSMOS-DASH survey, the largest area near-IR survey using HST-WFC3 to date. Utilizing the "Drift And SHift" observing technique for HST-WFC3 imaging, the COSMOS-DASH survey imaged approximately 0.5 deg2 of the UltraVISTA deep stripes (0.7 deg2, when combined with …
Constraining Galaxy Overdensities around Three z 6.5 Quasars with ALMA and MUSE
Li, Qiong; Walter, Fabian; Meyer, Romain A. +6 more
We quantify galaxy overdensities around three high-redshift quasars with known [C II]158 µm companions: PJ231-20 (z = 6.59), PJ308-21 (z = 6.24), and J0305-3150 (z = 6.61). Recent SCUBA2 imaging revealed the presence of 17 submillimeter galaxies (SMGs) with sky separations 0.'7 < θ < 2.'4 from these three quasars. We present…
A Uniform Type Ia Supernova Distance Ladder with the Zwicky Transient Facility: Absolute Calibration Based on the Tip of the Red Giant Branch Method
Riddle, Reed; Madore, Barry F.; Freedman, Wendy L. +21 more
The current Cepheid-calibrated distance ladder measurement of H 0 is reported to be in tension with the values inferred from the cosmic microwave background (CMB), assuming standard cosmology. However, some tip of the red giant branch (TRGB) estimates report H 0 in better agreement with the CMB. Hence, it is critical to reduc…
Reconstructing the Pleiades with Gaia EDR3
Caiazzo, Ilaria; Richer, Harvey B.; Heyl, Jeremy
We search through an eight million cubic parsec volume surrounding the Pleiades star cluster and the Sun to identify both the current and past members of the Pleiades cluster within the Gaia EDR3 data set. We find nearly 1300 current cluster members and 289 former cluster candidates. Many of these candidates lie well in front of or behind the clus…