Search Publications
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…
Carbon Abundances in Starburst Galaxies of the Local Universe
Leitherer, Claus; Wofford, Aida; Kewley, Lisa +2 more
The cosmological origin of carbon, the fourth most abundant element in the universe, is not well known and a matter of heavy debate. We investigate the behavior of C/O to O/H in order to constrain the production mechanism of carbon. We measured emission-line intensities in the spectral range from 1600 to 10000 Å on Space Telescope Imaging Spectrog…
Search for the warm-hot intergalactic medium around A 2744 using Suzaku
Finoguenov, Alexis; Akamatsu, Hiroki; Ota, Naomi +2 more
We present the results from Suzaku satellite observations of the surrounding region of a galaxy cluster, A 2744, at z = 0.3. To search for oxygen emission lines from the warm-hot intergalactic medium (WHIM), we analyzed X-ray spectra from two northeastern regions 2.2-3.3 and 3.3-4.4 Mpc from the center of the cluster, which offers the first test o…
VLBA Trigonometric Parallax Measurement of the Semi-regular Variable RT Vir
Menten, Karl M.; Honma, Mareki; Reid, Mark J. +4 more
We report a trigonometric parallax measurement of 22 GHz H2O masers toward the semi-regular variable RT Vir from multi-epoch Very Long Baseline Array observations. The parallax of 4.417 ± 0.134 mas, corresponding to a distance of 226 ± 7 pc, is significantly different from the Hipparcos parallax, but is consistent with a distance derive…
What is the Milky Way outer halo made of?. High resolution spectroscopy of distant red giants
Minniti, D.; Jablonka, P.; Starkenburg, E. +5 more
In a framework where galaxies form hierarchically, extended stellar haloes are predicted to be an ubiquitous feature around Milky Way-like galaxies and to consist mainly of the shredded stellar component of smaller galactic systems. The type of accreted stellar systems are expected to vary according to the specific accretion and merging history of…