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Chromosphere to 1 AU Simulation of the 2011 March 7th Event: A Comprehensive Study of Coronal Mass Ejection Propagation
de Koning, C. A.; Gombosi, T. I.; Tóth, G. +5 more
We perform and analyze the results of a global magnetohydrodynamic simulation of the fast coronal mass ejection (CME) that occurred on 2011 March 7. The simulation is made using the newly developed Alfvén Wave Solar Model (AWSoM), which describes the background solar wind starting from the upper chromosphere and extends to 24 R⊙. Coupli…
The Greater Taurus-Auriga Ecosystem. I. There is a Distributed Older Population
Herczeg, Gregory J.; Rizzuto, Aaron C.; Kraus, Adam L. +5 more
The census of Taurus-Auriga has been assembled over seven decades and inherited the biases and incompleteness of the input studies. The unusual shape of its inferred initial mass function (IMF) and the existence of isolated disk-bearing stars suggest that additional (likely disk-free) members remain to be discovered. We therefore have begun a glob…
Space Telescope and Optical Reverberation Mapping Project.VI. Reverberating Disk Models for NGC 5548
Im, M.; Geier, S.; Zheng, W. +90 more
We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 \mathringA to 9157 \mathringA ) combine simultaneous Hubble Space Telescope, Swift, and ground-based observations over a 180 day period from 2014 J…
In-orbit Performance of UVIT and First Results
Stalin, C. S.; Rao, N. Kameswara; Sutaria, F. +23 more
The performance of the ultraviolet telescope (UVIT) on-board AstroSat is reported. The performance in orbit is also compared with estimates made from the calibrations done on the ground. The sensitivity is found to be within
The PAH Emission Characteristics of the Reflection Nebula NGC 2023
Wolfire, Mark G.; Peeters, Els; Tielens, Alexander G. G. M. +3 more
We present 5-20 µm spectral maps of the reflection nebula NGC 2023 obtained with the Infrared Spectrograph SL and SH modes on board the Spitzer Space Telescope, which reveal emission from polycyclic aromatic hydrocarbons (PAHs), C60, and H2 superposed on a dust continuum. We show that several PAH emission bands correlat…
Detection of Supermassive Black Holes in Two Virgo Ultracompact Dwarf Galaxies
Romanowsky, Aaron J.; Neumayer, Nadine; Strader, Jay +13 more
We present the detection of supermassive black holes (BHs) in two Virgo ultracompact dwarf galaxies (UCDs), VUCD3 and M59cO. We use adaptive optics assisted data from the Gemini/NIFS instrument to derive radial velocity dispersion profiles for both objects. Mass models for the two UCDs are created using multi-band Hubble Space Telescope imaging, i…
Estimating stellar atmospheric parameters, absolute magnitudes and elemental abundances from the LAMOST spectra with Kernel-based principal component analysis
Huang, Y.; Chen, B. -Q.; Wang, C. +16 more
Accurate determination of stellar atmospheric parameters and elemental abundances is crucial for Galactic archaeology via large-scale spectroscopic surveys. In this paper, we estimate stellar atmospheric parameters - effective temperature Teff, surface gravity log g and metallicity [Fe/H], absolute magnitudes MV and MKs<…
The WISSH quasars project. III. X-ray properties of hyper-luminous quasars
Fiore, F.; Bianchi, S.; Martocchia, S. +14 more
We performed a survey of the X-ray properties of 41 objects from the WISE/SDSS selected hyper-luminous (WISSH) quasars sample, which includes 86 broad-line quasars with bolometric luminosity LBol ≳ 2 × 1047 erg s-1 shining at z 2-4. We used both proprietary and archival Chandra and XMM-Newton observations. Twenty-o…
A Spatially Resolved Study of Cold Dust, Molecular Gas, H II Regions, and Stars in the z = 2.12 Submillimeter Galaxy ALESS67.1
Ivison, R. J.; Smail, Ian; Brandt, W. N. +17 more
We present detailed studies of a z = 2.12 submillimeter galaxy, ALESS67.1, using sub-arcsecond resolution ALMA, adaptive optics-aided VLT/SINFONI, and Hubble Space Telescope (HST)/CANDELS data to investigate the kinematics and spatial distributions of dust emission (870 µm continuum), 12CO(J = 3-2), strong optical emission lines, …
The relation between the column density structures and the magnetic field orientation in the Vela C molecular complex
Ade, P. A. R.; Martin, P. G.; Netterfield, C. B. +27 more
We statistically evaluated the relative orientation between gas column density structures, inferred from Herschel submillimetre observations, and the magnetic field projected on the plane of sky, inferred from polarized thermal emission of Galactic dust observed by the Balloon-borne Large-Aperture Submillimetre Telescope for Polarimetry (BLASTPol)…