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Optical reconstruction of dust in the region of supernova remnant RX J1713.7−3946 from astrometric data
Krone-Martins, A.; Rowell, G.; Fukui, Y. +5 more
The origin of the radiation observed in the region of the supernova remnant RX J1713.7−3946, one of the brightest TeV emitters, has been debated since its discovery. The existence of atomic and molecular clouds in this object supports the idea that part of the GeV gamma-ray emission in this region originates from proton-proton collisions. However,…
Cloud structures in M 17 SWex : Possible cloud-cloud collision
Sanhueza, Patricio; Kim, Kee-Tae; Nakamura, Fumitaka +11 more
Using wide-field 13CO (J = 1-0) data taken with the Nobeyama 45 m telescope, we investigate cloud structures of the infrared dark cloud complex in M 17 with Spectral Clustering for Interstellar Molecular Emission Segmentation. In total, we identified 118 clouds that include 11 large clouds with radii larger than 1 pc. The clouds are mai…
NGTS-13b: a hot 4.8 Jupiter-mass planet transiting a subgiant star
Jordán, Andrés; Wheatley, Peter J.; Bayliss, Daniel +31 more
We report the discovery of the massive hot Jupiter NGTS-13b by the Next Generation Transit Survey (NGTS). The V = 12.7 host star is likely in the subgiant evolutionary phase with logg* = 4.04 ± 0.05, Teff = 5819 ± 73 K, M* = 1.30−0.18+0.11 M⊙, and R* = 1.79 ± 0.06 R⊙…
The TOPGöt high-mass star-forming sample. I. Methyl cyanide emission as tracer of early phases of star formation
Immer, K.; Testi, L.; Elia, D. +9 more
Aims: The TOPGöt project studies a sample of 86 high-mass star-forming regions in different evolutionary stages from starless cores to ultra compact HII regions. The aim of the survey is to analyze different molecular species in a statistically significant sample to study the chemical evolution in high-mass star-forming regions, and identify …
Modeling of Spiral Structure in a Multi-Component Milky Way-Like Galaxy
Korchagin, Vladimir; Khrapov, Sergey; Khoperskov, Alexander
Using recent observational data, we construct a set of multi-component equilibrium models of the disk of a Milky Way-like galaxy. The disk dynamics are studied using collisionless-gaseous numerical simulations, based on the joined integration of the equations of motion for the collision-less particles using direct integration of gravitational inte…
AGN Triality of Triple Mergers: Multiwavelength Classifications
Gültekin, Kayhan; Runnoe, Jessie C.; Foord, Adi +1 more
We present results from a multiwavelength analysis searching for multiple active galactic nucleus (AGN) systems in nearby (z < 0.077) triple galaxy mergers. Combining archival Chandra, Sloan Digital Data Survey (SDSS), Wide-field Infrared Survey Explorer (WISE), and Very Large Array observations, we quantify the rate of nearby triple AGNs, as w…
Fine Structures of an EUV Wave Event from Multi-viewpoint Observations
Moon, Yong-Jae; Chen, P. F.; Schmieder, Brigitte +4 more
In this study, we investigate an extreme ultraviolet (EUV) wave event on 2010 February 11, which occurred as a limb event from the Earth viewpoint and a disk event from the Solar Terrestrial Relations Observatory-Behind viewpoint. We use the data obtained by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory in various EUV ch…
A partial Lyman limit system tracing intragroup gas at z ≈ 0.8 towards HE 1003 + 0149
Charlton, Jane C.; Johnson, Sean D.; Sameer +6 more
We present analysis of the galaxy environment and physical properties of a partial Lyman limit system at z = 0.83718 with H I and metal-line components closely separated in redshift space (|Δv| ≈ 400 km s-1) towards the background quasar HE 1003 + 0149. The HST/COS far-ultraviolet spectrum provides coverage of lines of oxygen ions from …
Outflows from GRB hosts are ubiquitous: Kinematics of z < 0.3 GRB-SN hosts resolved with FLAMES
Covino, S.; Della Valle, M.; Melandri, A. +12 more
The hosts of long duration gamma-ray bursts (GRBs) are predominantly starburst galaxies at subsolar metallicity. At redshifts z < 1, this implies that most of them are low-mass galaxies similar to the populations of blue compact dwarfs and dwarf irregulars. What triggers the massive star-formation needed for producing a GRB progenitor is still …
The composite X-ray spectra of radio-loud and radio-quiet SDSS quasars
Gu, Min-Feng; Zhou, Min-Hua
We present a study of the X-ray emission for a sample of radio-detected quasars constructed from the cross-matches between SDSS, FIRST catalogs and XMM-Newton archives. A sample of radio-quiet SDSS quasars without FIRST radio detection is also assembled for comparison. We construct the optical and X-ray composite spectra normalized at rest frame 4…