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A robust measurement of the mass outflow rate of the galactic outflow from NGC 6090
Chisholm, John; Leitherer, Claus; Tremonti Christy, A. +1 more
To evaluate the impact of stellar feedback, it is critical to estimate the mass outflow rates of galaxies. Past estimates have been plagued by uncertain assumptions about the outflow geometry, metallicity, and ionization fraction. Here we use Hubble Space Telescope ultraviolet spectroscopic observations of the nearby starburst NGC 6090 to demonstr…
Catalog of equatorial coordinates and B-magnitudes of stars of the FON project
Andruk, V. M.; Pakuliak, L. K.; Golovnia, V. V. +4 more
The catalog of equatorial coordinates α and δ and B-magnitudes of stars of the northern sky (from–4° to +90°) was created as a part of the FON project at the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. The data accumulated in the Joint Digital Archive of the Ukrainian Virtual Observatory were used. The total numbe…
Determining Ages of APOGEE Giants with Known Distances
Bovy, Jo; Majewski, Steven R.; Feuillet, Diane K. +4 more
We present a sample of 705 local giant stars observed using the New Mexico State University 1 m telescope with the Sloan Digital Sky Survey-III/Apache Point Observatory Galactic Evolution Experiment (APOGEE) spectrograph, for which we estimate stellar ages and the local star formation history (SFH). The high-resolution (R ∼ 22,500), near infrared …
Tracing extended low-velocity shocks through SiO emission. Case study of the W43-MM1 ridge
Hill, T.; Schneider, N.; Maury, A. +8 more
Aims: Previous literature suggests that the densest structures in the interstellar medium form through colliding flows, but patent evidence of this process is still missing. Recent literature proposes using SiO line emission to trace low-velocity shocks associated with cloud formation through collision. In this paper we investigate the bright…
Density diagnostics derived from the O iv and S iv intercombination lines observed by IRIS
Mason, H. E.; Del Zanna, G.; Reeves, K. K. +3 more
The intensity of the O iv 2s2 2p 2P-2s2p24P and S iv 3 s2 3p 2P-3s 3p24 P intercombination lines around 1400 Å observed with the Interface Region Imaging Spectrograph (IRIS) provide a useful tool to diagnose the electron number density (Ne) in the so…
CSI 2264: Characterizing Young Stars in NGC 2264 with Stochastically Varying Light Curves
Song, Inseok; Gillen, Edward; Cody, Ann Marie +25 more
We provide CoRoT and Spitzer light curves and other supporting data for 17 classical T Tauri stars in NGC 2264 whose CoRoT light curves exemplify the “stochastic” light curve class as defined in 2014 by Cody et al. The most probable physical mechanism to explain the optical variability within this light curve class is time-dependent mass accretion…
Cosmochemical implications of CONSERT permittivity characterization of 67P/CG
Lasue, J.; Quirico, E.; Kofman, W. +7 more
Analysis of the propagation of the Comet Nucleus Sounding Experiment by Radiowave Transmission (CONSERT) signal throughout the small lobe of the 67P/CG nucleus has permitted us to deduce the real part of the permittivity, at a value of 1.27 ± 0.05. The first interpretation of this value, using the dielectric properties of mixtures of ices (H2…
Cross-scale energy transport in space plasmas
Nykyri, K.; Moore, T. W.; Dimmock, A. P.
The solar wind is a supersonic magnetized plasma streaming far into the heliosphere. Although cooling as it flows, it is rapidly heated upon encountering planetary obstacles. At Earth, this interaction forms the magnetosphere and its sub-regions. The present paper focuses on particle heating across the boundary separating the shocked solar wind an…
Fan-shaped jets above the light bridge of a sunspot driven by reconnection
Rouppe van der Voort, Luc; Leenaarts, Jorrit; Robustini, Carolina +1 more
We report on a fan-shaped set of high-speed jets above a strongly magnetized light bridge (LB) of a sunspot observed in the Hα line. We study the origin, dynamics, and thermal properties of the jets using high-resolution imaging spectroscopy in Hα from the Swedish 1m Solar Telescope and data from the Solar Dynamics Observatory and Hinode. The Hα j…
SN Refsdal: Classification as a Luminous and Blue SN 1987A-like Type II Supernova
Zitrin, A.; Filippenko, A. V.; Foley, R. J. +20 more
We have acquired Hubble Space Telescope (HST) and Very Large Telescope near-infrared spectra and images of supernova (SN) Refsdal after its discovery as an Einstein cross in fall 2014. The HST light curve of SN Refsdal has a shape consistent with the distinctive, slowly rising light curves of SN 1987A-like SNe, and we find strong evidence for a br…