Search Publications
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…
Three-dimensional Shape Explains Star Formation Mystery of California and Orion A
Kainulainen, Jouni; Rezaei Kh., Sara
The new Gaia data release (EDR3) with improved astrometry has opened a new era in studying our Milky Way in fine detail. We use Gaia EDR3 astrometry together with 2MASS and WISE photometry to study two of the most massive molecular clouds in the solar vicinity: Orion A and California. Despite having remarkable similarities in the plane of the sky …
Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. IV. The Effects of Different Density Estimates on the Ionized Gas Masses and Outflow Rates
Rafelski, Marc; Fischer, Travis C.; Collins, Nicholas R. +9 more
Active galactic nuclei (AGN) can launch outflows of ionized gas that may influence galaxy evolution, and quantifying their full impact requires spatially resolved measurements of the gas masses, velocities, and radial extents. We previously reported these quantities for the ionized narrow-line region outflows in six low-redshift AGN, where the gas…
After The Fall: Resolving the Molecular Gas in Post-starburst Galaxies
Bell, Eric F.; Zabludoff, Ann I.; Walter, Fabian +8 more
Post-starburst (PSB), or "E + A," galaxies represent a rapid transitional phase between major, gas-rich mergers and gas-poor, quiescent, early-type galaxies. Surprisingly, many PSBs have been shown to host a significant interstellar medium (ISM), despite theoretical predictions that the majority of the star-forming gas should be expelled in active…
Investigating the Effect of Galaxy Interactions on Star Formation at 0.5 < z < 3.0
Hathi, Nimish P.; Kartaltepe, Jeyhan S.; Kocevski, Dale D. +24 more
Observations and simulations of interacting galaxies and mergers in the local universe have shown that interactions can significantly enhance the star formation rates (SFRs) and fueling of active galactic nuclei (AGN). However, at higher redshift, some simulations suggest that the level of star formation enhancement induced by interactions is lowe…