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ALMA Imaging and Gravitational Lens Models of South Pole Telescope—Selected Dusty, Star-Forming Galaxies at High Redshifts
Béthermin, M.; Weiss, A.; Greve, T. R. +18 more
The South Pole Telescope has discovered 100 gravitationally lensed, high-redshift, dusty, star-forming galaxies (DSFGs). We present 0.″5 resolution 870 µ {{m}} Atacama Large Millimeter/submillimeter Array imaging of a sample of 47 DSFGs spanning z=1.9{--}5.7, and construct gravitational lens models of these sources. Our visibility-based lens…
A global look at X-ray time lags in Seyfert galaxies
Fabian, A. C.; Reynolds, C. S.; Uttley, P. +4 more
X-ray reverberation, where light-travel time delays map out the compact geometry around the inner accretion flow in supermassive black holes, has been discovered in several of the brightest, most variable and well-known Seyfert galaxies. In this work, we expand the study of X-ray reverberation to all Seyfert galaxies in the XMM-Newton archive abov…
The Evolution of Normal Galaxy X-Ray Emission through Cosmic History: Constraints from the 6 MS Chandra Deep Field-South
Lehmer, B. D.; Hornschemeier, A. E.; Yukita, M. +17 more
We present measurements of the evolution of normal-galaxy X-ray emission from z\quad ≈ 0-7 using local galaxies and galaxy samples in the ≈6 Ms Chandra Deep Field-South (CDF-S) survey. The majority of the CDF-S galaxies are observed at rest-frame energies above 2 keV, where the emission is expected to be dominated by X-ray binary (XRB) populations…
The Lyman-Continuum Photon Production Efficiency ξ ion of z ∼ 4-5 Galaxies from IRAC-based Hα Measurements: Implications for the Escape Fraction and Cosmic Reionization
Bouwens, R. J.; Franx, M.; Labbé, I. +5 more
Galaxies represent one of the preferred candidate sources to drive the reionization of the universe. Even as gains are made in mapping the galaxy UV luminosity density to z\gt 6, significant uncertainties remain regarding the conversion to the implied ionizing emissivity. The relevant unknowns are the Lyman-continuum (LyC) photon production effici…
The Herschel Orion Protostar Survey: Spectral Energy Distributions and Fits Using a Grid of Protostellar Models
Manoj, P.; Megeath, S. T.; Watson, D. M. +12 more
We present key results from the Herschel Orion Protostar Survey: spectral energy distributions (SEDs) and model fits of 330 young stellar objects, predominantly protostars, in the Orion molecular clouds. This is the largest sample of protostars studied in a single, nearby star formation complex. With near-infrared photometry from 2MASS, mid- and f…
Slow Solar Wind: Observations and Modeling
Li, B.; Harra, L.; Riley, P. +9 more
While it is certain that the fast solar wind originates from coronal holes, where and how the slow solar wind (SSW) is formed remains an outstanding question in solar physics even in the post-SOHO era. The quest for the SSW origin forms a major objective for the planned future missions such as the Solar Orbiter and Solar Probe Plus. Nonetheless, r…
The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence M Dwarfs
McArthur, B. E.; Benedict, G. F.; Franz, O. G. +8 more
We present a mass-luminosity relation (MLR) for red dwarfs spanning a range of masses from 0.62 {{ M }}⊙ to the end of the stellar main sequence at 0.08 {{ M }}⊙ . The relation is based on 47 stars for which dynamical masses have been determined, primarily using astrometric data from Fine Guidance Sensors (FGS) 3 and 1r, whi…
The superluminous transient ASASSN-15lh as a tidal disruption event from a Kerr black hole
Sollerman, J.; Gal-Yam, A.; Kim, S. +47 more
When a star passes within the tidal radius of a supermassive black hole, it will be torn apart1. For a star with the mass of the Sun (M ⊙) and a non-spinning black hole with a mass <108 M ⊙, the tidal radius lies outside the black hole event horizon2 and the disruption results in a luminous…
Eclipsing Binaries as Benchmarks for Trigonometric Parallaxes in the Gaia Era
Torres, Guillermo; Stassun, Keivan G.
We present fits to the broadband photometric spectral energy distributions (SEDs) of 158 eclipsing binaries (EBs) in the Tycho-2 catalog. These EBs were selected because they have highly precise stellar radii, effective temperatures, and in many cases metallicities previously determined in the literature, and thus have bolometric luminosities that…
The COS-Halos Survey: Origins of the Highly Ionized Circumgalactic Medium of Star-Forming Galaxies
Tripp, Todd M.; Prochaska, J. Xavier; Cantalupo, Sebastiano +6 more
The total contribution of diffuse halo gas to the galaxy baryon budget strongly depends on its dominant ionization state. In this paper, we address the physical conditions in the highly ionized circumgalactic medium (CGM) traced by {{O}} {{VI}} absorption lines observed in COS-Halos spectra. We analyze the observed ionic column densities, absorpti…