Search Publications
Missions
Journals
Publication Years
A Detailed Study of the Most Relaxed SPT-selected Galaxy Clusters: Properties of the Cool Core and Central Galaxy
Schrabback, T.; Hlavacek-Larrondo, J.; Bayliss, M. +14 more
We present a multi-wavelength analysis of the four most relaxed clusters in the South Pole Telescope 2500 deg2 survey, which lie at 0.55 < z < 0.75. This study, which utilizes new, deep data from the Chandra X-ray Observatory and Hubble Space Telescope, along with ground-based spectroscopy from Gemini and Magellan, improves signif…
Frequency-Distance Structure of Solar Radio Sources Observed by LOFAR
Browning, Philippa; Gordovskyy, Mykola; Kontar, Eduard +1 more
Low-frequency radio observations make it possible to study the solar corona at distances up to 2-3 R ⊙. Frequency of plasma emission is a proxy for electron density of the emitting plasma and, therefore, observations of solar radio bursts can be used to probe the density structure of the outer corona. In this study, positions of solar r…
Radius Inflation at Low Rossby Number in the Hyades Cluster
Stassun, Keivan G.; Somers, Garrett; Jaehnig, Karl
Radius inflation continues to be explored as a peculiar occurrence among magnetically active, low-mass stars. Recently, Somers & Stassun showed that radius inflation among low-mass stars in the young open cluster M45 (Pleiades Cluster) is correlated to the rotation rate: faster rotators are more inflated. Here we extend that work to a sample o…
The Dynamics, Structure, and Fate of a Young Cluster during Gas Dispersal: Hectoschelle, Chandra, Spitzer, and Gaia Observations of Cep OB3b
Jeffries, R. D.; Megeath, S. T.; Gutermuth, R. A. +5 more
We present a study of the kinematics and structure of the Cep OB3b cluster based on new spectra obtained with the Hectoschelle spectrograph on the MMT and data from Spitzer, Chandra, and Gaia. At a distance of 819 ± 16 pc, Cep OB3b is one of the closest examples of a young (∼3-5 Myr), large (∼3000 total members) cluster at the late stages of gas d…
Models of the Mass-ejection Histories of Pre-planetary Nebulae. III. The Shaping of Lobes by Post-AGB Winds
Frank, Adam; Balick, Bruce; Liu, Baowei
We develop a physical framework for interpreting high-resolution images and kinematics of pre-planetary nebulae (“prePNe”). We use hydrodynamical models to infer the historical properties of fast collimated nuclear flows (“jet”) that successfully form hollow, candle-shaped lobes over ≈103 yr, including the density, momenta, and geometry…
Near-term interstellar probe: First step
Wimmer-Schweingruber, Robert F.; McNutt, Ralph L.; Gruntman, Mike +9 more
Exploration of the heliosphere and the far reaches of our solar system by the Voyagers and New Horizons and near-Earth observations of the Kuiper Belt and exoplanetary systems have all profoundly changed how we view our own home in space. An Interstellar Probe escaping beyond the solar-system boundaries with new observational techniques would be a…
Quantifying the thermal Sunyaev-Zel'dovich effect and excess millimetre emission in quasar environments
Hilton, Matt; Sifón, Cristóbal; Battaglia, Nicholas +23 more
In this paper, we probe the hot, post-shock gas component of quasar-driven winds through the thermal Sunyaev-Zel'dovich (tSZ) effect. Combining data sets from the Atacama Cosmology Telescope, the Herschel Space Observatory, and the Very Large Array, we measure average spectral energy distributions of 109 829 optically selected, radio quiet quasars…
The effect of tides on the Sculptor dwarf spheroidal galaxy
Iorio, G.; Battaglia, G.; Sollima, A. +1 more
Dwarf spheroidal galaxies (dSphs) appear to be some of the most dark matter (DM)-dominated objects in the Universe. Their dynamical masses are commonly derived using the kinematics of stars under the assumption of equilibrium. However, these objects are satellites of massive galaxies (e.g. the Milky Way) and thus can be influenced by their tidal f…
The Interplay of the Solar Wind Core and Suprathermal Electrons: A Quasilinear Approach for Firehose Instability
Lazar, M.; Poedts, S.; Yoon, P. H. +1 more
In the solar wind an equipartition of kinetic energy densities can be easily established between thermal and suprathermal electrons and the instability conditions are markedly altered by the interplay of these two populations. The new thresholds derived here for the periodic branch of firehose instability shape the limits of temperature anisotropy…
Transfer of Twists from a Mini-filament to Large-scale Loops by Magnetic Reconnection
Li, Ting; Xue, Zhike; Yan, Xiaoli +4 more
With high spatial and temporal resolution, Hα data from the New Vacuum Solar Telescope, X-ray images from the X-ray telescope on board Hinode and simultaneous observations from the Solar Dynamics Observatory, we present multiwavelength observations of the interaction between a mini-filament (MF) and its overlying large-scale active-region loops (A…