Search Publications
Mass, Spin, and Ultralight Boson Constraints from the Intermediate-mass Black Hole in the Tidal Disruption Event 3XMM J215022.4-055108
Wen, Sixiang; Jonker, Peter G.; Stone, Nicholas C. +1 more
We simultaneously and successfully fit the multiepoch X-ray spectra of the tidal disruption event (TDE) 3XMM J215022.4-055108 using a modified version of our relativistic slim disk model that now accounts for angular momentum losses from radiation. We explore the effects of different disk properties and of uncertainties in the spectral hardening f…
A Catalog of Potential Post-Common Envelope Binaries
Kobayashi, Chiaki; Di Stefano, Rosanne; Gao, Yan +2 more
We present a catalog containing 839 candidate post-common envelope systems. Common envelope evolution is very important in stellar astrophysics, particularly in the context of very compact and short-period binaries, including cataclysmic variables, as progenitors of, e.g., supernovae Type Ia or mergers of black holes and/or neutron stars. At the s…
Recurring Planetary Debris Transits and Circumstellar Gas around White Dwarf ZTF J0328-1219
Vanderburg, Andrew; Hermes, J. J.; Weinberger, Alycia J. +14 more
We present follow-up photometry and spectroscopy of ZTF J0328-1219, strengthening its status as a white dwarf exhibiting transiting planetary debris. Using TESS and Zwicky Transient Facility photometry, along with follow-up high-speed photometry from various observatories, we find evidence for two significant periods of variability at 9.937 and 11…
Measurements of the Dust Properties in z ≃ 1-3 Submillimeter Galaxies with ALMA
Smail, I.; Brandt, W. N.; Weiss, A. +13 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) 2 mm continuum observations of a complete and unbiased sample of 99 870 µm selected submillimeter galaxies (SMGs) in the Extended Chandra Deep Field South (ALESS). Our observations of each SMG reach average sensitivities of 53 µJy beam-1. We measure the flux dens…
Are All Post-starbursts Mergers? HST Reveals Hidden Disturbances in the Majority of PSBs
Heckman, Timothy; French, K. Decker; Nyland, Kristina +12 more
How do galaxies transform from blue, star-forming spirals to red, quiescent early-type galaxies? To answer this question, we analyzed a set of 26 gas-rich, shocked post-starburst galaxies with Hubble Space Telescope (HST) imaging in B, I, and H bands and Sloan Digital Sky Survey (SDSS) i-band imaging of similar depth but lower resolution. We found…
JCMT POL-2 and BISTRO Survey Observations of Magnetic Fields in the L1689 Molecular Cloud
Pattle, Kate; Ward-Thompson, Derek; Bastien, Pierre +26 more
We present 850 µm polarization observations of the L1689 molecular cloud, part of the nearby Ophiuchus molecular cloud complex, taken with the POL-2 polarimeter on the James Clerk Maxwell Telescope (JCMT). We observe three regions of L1689: the clump L1689N which houses the IRAS 16293-2433 protostellar system, the starless clump SMM-16, and …
Evolution of Galaxy Star Formation and Metallicity: Impact on Double Compact Object Mergers
Danese, L.; Lapi, A.; Donevski, D. +3 more
In this paper, we study the impact of different galaxy statistics and empirical metallicity scaling relations on the merging rates and properties of compact object binaries. Firstly, we analyze the similarities and differences of using the star formation rate functions versus stellar mass functions as galaxy statistics for the computation of cosmi…
The Evolving Interstellar Medium of Star-forming Galaxies, as Traced by Stardust
Brammer, Gabriel; Daddi, Emanuele; Toft, Sune +13 more
We analyze the far-infrared (FIR) properties of ~5000 star-forming galaxies at z < 4.5, drawn from the deepest, super-deblended catalogs in the GOODS-N and COSMOS fields. We develop a novel panchromatic spectral energy distribution fitting algorithm, Stardust, that models the emission from stars, active galactic nuclei (AGNs), and infrared dust…
New Candidate Extreme T Subdwarfs from the Backyard Worlds: Planet 9 Citizen Science Project
Debes, John H.; Meisner, Aaron M.; Line, Michael R. +27 more
Schneider et al. presented the discovery of WISEA J041451.67-585456.7 and WISEA J181006.18-101000.5, which appear to be the first examples of extreme T-type subdwarfs (esdTs; metallicity ≤-1 dex, Teff ≲ 1400 K). Here, we present new discoveries and follow-up of three T-type subdwarf candidates, with an eye toward expanding the sample of…
A Catalog of 204 Offset and Dual Active Galactic Nuclei (AGNs): Increased AGN Activation in Major Mergers and Separations under 4 kpc
Griffith, Roger L.; Stern, Daniel; Stemo, Aaron +4 more
During galaxy mergers, gas and dust are driven toward the centers of merging galaxies, triggering enhanced star formation and supermassive black hole (SMBH) growth. Theory predicts that this heightened activity peaks at SMBH separations <20 kpc; if sufficient material accretes onto one or both of the SMBHs for them to become observable as activ…