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Globular clusters in the far-ultraviolet: evidence for He-enriched second populations in extragalactic globular clusters?
Kundu, Arunav; Zepf, Stephen E.; Peacock, Mark B. +1 more
We investigate the integrated far-ultraviolet (FUV) emission from globular clusters. We present new FUV photometry of M87's clusters based on archival Hubble Space Telescope (HST) Wide Field Planetary Camera 2 F170W observations. We use these data to test the reliability of published photometry based on HST space telescope imaging spectrograph FUV…
OH Survey along Sightlines of Galactic Observations of Terahertz C+
Wang, Shen; Heiles, Carl; Li, Di +9 more
We have obtained OH spectra of four transitions in the {}2{{{\Pi }}}3/2 ground state, at 1612, 1665, 1667, and 1720 MHz, toward 51 sightlines that were observed in the Herschel project Galactic Observations of Terahertz C+. The observations cover the longitude range of (32°, 64°) and (189°, 207°) in the northern Galactic plan…
X-ray-emitting active galactic nuclei from z = 0.6 to 1.3 in the intermediate- and high-density environments of the ORELSE survey
Tomczak, A.; Fassnacht, C. D.; Kocevski, D. D. +8 more
We studied active galactic nucleus (AGN) activity in 12 large-scale structures (LSSs) in the Observations of Redshift Evolution in Large-Scale Environments (ORELSE) survey, at 0.65 < z < 1.28, using a combination of Chandra observations, optical and NIR imaging and spectroscopy. We located a total of 61 AGNs that were successfully matched to…
Results from a triple chord stellar occultation and far-infrared photometry of the trans-Neptunian object (229762) 2007 UK126
Kiss, C.; Ortiz, J. L.; Braga-Ribas, F. +8 more
Context. A stellar occultation by a trans-Neptunian object (TNO) provides an opportunity to probe the size and shape of these distant solar system bodies. In the past seven years, several occultations by TNOs have been observed, but mostly from a single location. Only very few TNOs have been sampled simultaneously from multiple locations. Sufficie…
Neutron-capture element abundances in the planetary nebula NGC 5315 from deep optical and near-infrared spectrophotometry★†
Madonna, S.; García-Rojas, J.; Sterling, N. C. +5 more
We analyse the chemical composition of the planetary nebula (PN) NGC 5315, through high-resolution (R ∼ 40000) optical spectroscopy with Ultraviolet-Visual Echelle Spectrograph at the Very Large Telescope, and medium-resolution (R ∼ 4800) near-infrared spectroscopy with Folded-port InfraRed Echellette at Magellan Baade Telescope, covering a wide s…
Properties of the Irregular Satellite System around Uranus Inferred from K2, Herschel, and Spitzer Observations
Pál, A.; Molnár, L.; Marton, G. +10 more
In this paper, we present visible-range light curves of the irregular Uranian satellites Sycorax, Caliban, Prospero, Ferdinand, and Setebos taken with the Kepler Space Telescope over the course of the K2 mission. Thermal emission measurements obtained with the Herschel/PACS and Spitzer/MIPS instruments of Sycorax and Caliban were also analyzed and…
The origin and evolution of a differentiated Mimas
Rhoden, A. R.; Neveu, M.
In stark contrast with its neighbor moon Enceladus, Mimas is surprisingly geologically quiet, despite an eccentric orbit and distance to Saturn prone to levels of tidal dissipation 30 times higher. While Mimas' lack of geological activity could be due to a stiff, frigid interior, libration data acquired using the Cassini spacecraft suggest that it…
Evidence for different accretion regimes in GRO J1008-57
Rothschild, Richard E.; Fürst, Felix; Klochkov, Dmitry +6 more
We present a comprehensive spectral analysis of the BeXRB
Explosive Chromospheric Evaporation and Warm Rain in a C3.1 Flare Observed by IRIS, Hinode/EIS, and RHESSI
Brosius, Jeffrey W.; Inglis, Andrew R.
IRIS and EIS observed a GOES C3.1 flare in stare mode on 2014 March 15. The GOES flare started at 00:21:35 and peaked at 00:26:30 UT. The IRIS slit pointed near the center of the flare, while the EIS slit pointed 35\prime\prime to its west. About 4 minutes before the GOES flare start, the IRIS C II and Si IV intensities became (and rema…
Comparative Study of the Three-Dimensional Thermodynamical Structure of the Inner Corona of Solar Minimum Carrington Rotations 1915 and 2081
Frazin, Richard A.; Vásquez, Alberto M.; Nuevo, Federico A. +1 more
Using differential emission measure tomography (DEMT) based on time series of EUV images, we carry out a quantitative comparative analysis of the three-dimensional (3D) structure of the electron density and temperature of the inner corona (r <1.25 R⊙) between two specific rotations selected from the last two solar minima, namely Carr…