Search Publications
The Single-cloud Star Formation Relation
Henning, Thomas; Myers, Philip C.; Gutermuth, Robert A. +10 more
One of the most important and well-established empirical results in astronomy is the Kennicutt-Schmidt relation between the density of interstellar gas and the rate at which that gas forms stars. A tight correlation between these quantities has long been measured at galactic scales. More recently, using surveys of YSOs, a KS relationship has been …
The Mega-MUSCLES Spectral Energy Distribution of TRAPPIST-1
Loyd, R. O. Parke; Redfield, Seth; Roberge, Aki +19 more
We present a 5 Å-100 µm spectral energy distribution (SED) of the ultracool dwarf star TRAPPIST-1, obtained as part of the Mega-MUSCLES Treasury Survey. The SED combines ultraviolet and blue-optical spectroscopy obtained with the Hubble Space Telescope, X-ray spectroscopy obtained with XMM-Newton, and models of the stellar photosphere, chrom…
Two Contact Binaries with Mass Ratios Close to the Minimum Mass Ratio
Li, Kai; Xia, Qi-Qi; Chen, Xu +5 more
The cutoff mass ratio is under debate for contact binaries. In this paper, we present the investigation of two contact binaries with mass ratios close to the low mass ratio limit. It is found that the mass ratios of VSX J082700.8+462850 (hereafter J082700) and 1SWASP J132829.37+555246.1 (hereafter J132829) are both less than 0.1 (q ~ 0.055 for J08…
Milky Way Tomography with the SkyMapper Southern Survey. II. Photometric Recalibration of SMSS DR2
Huang, Yang; Ting, Yuan-Sen; Beers, Timothy C. +13 more
We apply the spectroscopy-based stellar-color regression (SCR) method to perform an accurate photometric recalibration of the second data release from the SkyMapper Southern Survey (SMSS DR2). From comparison with a sample of over 200,000 dwarf stars with stellar atmospheric parameters taken from GALAH+ DR3 and with accurate, homogeneous photometr…
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 …