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Trajectory Determination for Coronal Ejecta Observed by WISPR/Parker Solar Probe
Qiu, J.; Howard, R. A.; Vourlidas, A. +3 more
The Wide-field Imager for Solar Probe (WISPR) onboard the Parker Solar Probe (PSP), observing in white light, has a fixed angular field of view, extending from 13.5∘ to 108∘ from the Sun and approximately 50∘ in the transverse direction. Because of the highly elliptical orbit of PSP, the physical extent of the imag…
The Late-time Afterglow Evolution of Long Gamma-Ray Bursts GRB 160625B and GRB 160509A
Fruchter, Andrew S.; Cenko, S. Bradley; Tanvir, Nial +12 more
We present post-jet-break Hubble Space Telescope, Very Large Array, and Chandra observations of the afterglow of the long γ-ray bursts GRB 160625B (between 69 and 209 days) and GRB 160509A (between 35 and 80 days). We calculate the post-jet-break decline rates of the light curves and find the afterglow of GRB 160625B is inconsistent with a simple …
The peculiar kinematics of the multiple populations in the globular cluster Messier 80 (NGC 6093)
Dalessandro, E.; Dreizler, S.; Bastian, N. +10 more
We combine MUSE spectroscopy and Hubble Space Telescope ultraviolet (UV) photometry to perform a study of the chemistry and dynamics of the Galactic globular cluster Messier 80 (M80, NGC 6093). Previous studies have revealed three stellar populations that vary not only in their light-element abundances, but also in their radial distributions, with…
A long-period (P = 61.8 d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS
Jackman, James A. G.; Wheatley, Peter J.; Bayliss, Daniel +27 more
The Transiting Exoplanet Survey Satellite has produced a large number of single-transit event candidates which are being monitored by the Next Generation Transit Survey (NGTS). We observed a second epoch for the TIC-231005575 system (Tmag = 12.06 and $T_{\rm eff} = 5500 \pm 85\, \mathrm{ K}$ ) with NGTS and a third epoch with Las Cumbre…
High-resolution Spectroscopic Monitoring Observations of FU Orionis-type Object, V960 Mon
Lee, Jeong-Eun; Pyo, Tae-Soo; Park, Sunkyung +9 more
We present the results of high-resolution (R ≥ 30,000) optical and near-infrared (NIR) spectroscopic monitoring observations of an FU Orionis-type object (FUor), V960 Mon, which underwent an outburst in 2014 November. We have monitored this object with the Bohyunsan Optical Echelle Spectrograph and the Immersion GRating INfrared Spectrograph since…
Inferring the parallax of Westerlund 1 from Gaia DR2
Drout, Maria R.; Smith, Nathan; Stassun, Keivan G. +6 more
Westerlund 1 (Wd1) is potentially the largest star cluster in the Galaxy. That designation critically depends upon the distance to the cluster, yet the cluster is highly obscured, making luminosity-based distance estimates difficult. Using Gaia Data Release 2 (DR2) parallaxes and Bayesian inference, we infer a parallax of 0.35^{+0.07}_{-0.06} mas …
Scaling relations and baryonic cycling in local star-forming galaxies. I. The sample
Hunt, L. K.; Ginolfi, M.; Schneider, R. +2 more
Metallicity and gas content are intimately related in the baryonic exchange cycle of galaxies, and galaxy evolution scenarios can be constrained by quantifying this relation. To this end, we have compiled a sample of ∼400 galaxies in the local Universe, dubbed "MAGMA" (Metallicity And Gas for Mass Assembly), which covers an unprecedented range in …
The GALAH Survey: Chemically tagging the Fimbulthul stream to the globular cluster ω Centauri
Lewis, Geraint F.; Ting, Yuan-Sen; Buder, Sven +17 more
Using kinematics from Gaia and the large elemental abundance space of the second data release of the GALAH survey, we identify two new members of the Fimbulthul stellar stream, and chemically tag them to massive, multimetallic globular cluster ω Centauri. Recent analysis of the second data release of Gaia had revealed the Fimbulthul stellar stream…
Spectroscopy and polarimetry of the gravitationally lensed quasar SDSS J1004+4112 with the 6m SAO RAS telescope
Popović, L. Č.; Afanasiev, V. L.; Fian, C. +5 more
Context. We present new spectroscopic and polarimetric observations of the gravitational lens SDSS J1004+4112 taken with the 6 m telescope of the Special Astrophysical Observatory (Russia).
Aims: In order to explain the variability that is observed only in the blue wing of the C IV emission line, corresponding to image A, we analyze the spect…
The GAPS Programme at TNG. XXV. Stellar atmospheric parameters and chemical composition through GIARPS optical and near-infrared spectra
Baratella, M.; Mallonn, M.; Scandariato, G. +20 more
Context. The detailed chemical composition of stars is important in many astrophysical fields, among which is the characterisation of exoplanetary systems. Previous studies seem to indicate an anomalous chemical pattern of the youngest stellar population in the solar vicinity that has sub-solar metal content. This can influence various observation…