Search Publications
The Evolution of the IR Luminosity Function and Dust-obscured Star Formation over the Past 13 Billion Years
Kartaltepe, J. S.; Yun, M. S.; Clements, D. L. +25 more
We present the first results from the Mapping Obscuration to Reionization with ALMA (MORA) survey, the largest Atacama Large Millimeter/submillimeter Array (ALMA) blank-field contiguous survey to date (184 arcmin2) and the only at 2 mm to search for dusty star-forming galaxies (DSFGs). We use the 13 sources detected above 5σ to estimate…
Revisiting the Integrated Star Formation Law. II. Starbursts and the Combined Global Schmidt Law
Kennicutt, Robert C., Jr.; De Los Reyes, Mithi A. C.
We compile observations of molecular gas contents and infrared-based star formation rates (SFRs) for 112 circumnuclear star-forming regions, in order to reinvestigate the form of the disk-averaged Schmidt surface density star-formation law in starbursts. We then combine these results with total gas and SFR surface densities for 153 nearby nonstarb…
Observational Constraints on the Physical Properties of Interstellar Dust in the Post-Planck Era
Draine, B. T.; Hensley, Brandon S.
We present a synthesis of the astronomical observations constraining the wavelength-dependent extinction, emission, and polarization from interstellar dust from UV to microwave wavelengths on diffuse Galactic sight lines. Representative solid-phase abundances for those sight lines are also derived. Given the sensitive new observations of polarized…
Turbulent Gas in Lensed Planck-selected Starbursts at z ∼ 1-3.5
Frayer, D. T.; Frye, B. L.; Jiménez-Andrade, E. F. +26 more
Dusty star-forming galaxies at high redshift (1 < z < 3) represent the most intense star-forming regions in the universe. Key aspects to these processes are the gas heating and cooling mechanisms, and although it is well known that these galaxies are gas-rich, little is known about the gas excitation conditions. Only a few detailed radiative…
The Metallicity Dependence of the High-mass X-Ray Binary Luminosity Function
Williams, Benjamin F.; Zezas, Andreas; Basu-Zych, Antara +7 more
In this work, we present detailed constraints on the metallicity dependence of the high-mass X-ray binary (HMXB) X-ray luminosity function (XLF). We analyze ≈5 Ms of Chandra data for 55 actively star-forming galaxies at D ≲ 30 Mpc, with gas-phase metallicities spanning $12+\mathrm{log}({\rm{O}}/{\rm{H}})$ ≈ 7-9.2. Within the galactic footprints, o…
Mapping Obscuration to Reionization with ALMA (MORA): 2 mm Efficiently Selects the Highest-redshift Obscured Galaxies
Finkelstein, Steven L.; Casey, Caitlin M.; Long, Arianna S. +24 more
We present the characteristics of 2 mm selected sources from the largest Atacama Large Millimeter/submillimeter Array (ALMA) blank-field contiguous survey conducted to date, the Mapping Obscuration to Reionization with ALMA (MORA) survey covering 184 arcmin2 at 2 mm. Twelve of 13 detections above 5σ are attributed to emission from galax…
Rapid Variability of Sgr A* across the Electromagnetic Spectrum
Morris, Mark R.; Smith, Howard A.; Fazio, G. G. +17 more
Sagittarius A* (Sgr A*) is the variable radio, near-infrared (NIR), and X-ray source associated with accretion onto the Galactic center black hole. We have analyzed a comprehensive submillimeter (including new observations simultaneous with NIR monitoring), NIR, and 2-8 keV data set. Submillimeter variations tend to lag those in the NIR by ~30 min…
Illuminating the Dark Side of Cosmic Star Formation Two Billion Years after the Big Bang
Le Fèvre, Olivier; Faisst, Andreas; Cimatti, Andrea +5 more
How and when did galaxies form and assemble their stars and stellar mass? The answer to these questions, so crucial to astrophysics and cosmology, requires the full reconstruction of the so-called cosmic star formation rate density (SFRD), i.e., the evolution of the average star formation rate per unit volume of the universe. While the SFRD has be…
Evolution of Stellar Feedback in H II Regions
Bolatto, Alberto D.; Reiter, Megan; Lopez, Laura A. +4 more
Stellar feedback is needed to produce realistic giant molecular clouds and galaxies in simulations, but due to limited numerical resolution, feedback must be implemented using sub-grid models. Observational work is an important means to test and anchor these models, but limited studies have assessed the relative dynamical role of multiple feedback…
Revealing the Accretion Physics of Supermassive Black Holes at Redshift z ∼ 7 with Chandra and Infrared Observations
Hennawi, Joseph F.; Fan, Xiaohui; Walter, Fabian +14 more
X-ray emission from quasars has been detected up to redshift z = 7.5, although only limited to a few objects at z > 6.5. In this work, we present new Chandra observations of five z > 6.5 quasars. By combining with archival Chandra observations of six additional z > 6.5 quasars, we perform a systematic analysis on the X-ray properties of t…