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The BOSS Emission-line Lens Survey. V. Morphology and Substructure of Lensed Lyα Emitters at Redshift Z ≈ 2.5 in the BELLS GALLERY
Brownstein, Joel R.; Marques-Chaves, Rui; Oguri, Masamune +9 more
We present a morphological study of the 17 lensed Lyα emitter (LAE) galaxies of the Baryon Oscillation Spectroscopic Survey Emission-Line Lens Survey (BELLS) for the GALaxy-Lyα EmitteR sYstems (BELLS GALLERY) sample. This analysis combines the magnification effect of strong galaxy-galaxy lensing with the high resolution of the Hubble Space Telesco…
Molecular Gas Filaments and Star-forming Knots Beneath an X-Ray Cavity in RXC J1504-0248
Fabian, A. C.; Combes, F.; McDonald, M. +6 more
We present recent ALMA observations of the CO (1-0) and CO (3-2) emission lines in the brightest cluster galaxy of RXC J1504.1-0248, which is one of the most extreme cool core clusters known. The central galaxy contains 1.9× {10}10 {M}⊙ of molecular gas. The molecular gas morphology is complex and disturbed, showing no evide…
A Si IV/O IV Electron Density Diagnostic for the Analysis of IRIS Solar Spectra
Peter, H.; Young, P. R.; Keenan, F. P. +1 more
Solar spectra of ultraviolet bursts and flare ribbons from the Interface Region Imaging Spectrograph (IRIS) have suggested high electron densities of > {10}12 cm-3 at transition region temperatures of 0.1 MK, based on large intensity ratios of Si IV λ1402.77 to O IV λ1401.16. In this work, a rare observation of the weak O …
The Einstein@Home Gamma-ray Pulsar Survey. II. Source Selection, Spectral Analysis, and Multiwavelength Follow-up
Camilo, F.; Guillemot, L.; Johnson, T. J. +23 more
We report on the analysis of 13 gamma-ray pulsars discovered in the Einstein@Home blind search survey using Fermi Large Area Telescope (LAT) Pass 8 data. The 13 new gamma-ray pulsars were discovered by searching 118 unassociated LAT sources from the third LAT source catalog (3FGL), selected using the Gaussian Mixture Model machine-learning algorit…
First Detection of Solar Flare Emission in Mid-ultraviolet Balmer Continuum
Heinzel, Petr; Dammasch, Ingolf E.; Schmutz, Werner +8 more
We present the first detection of solar flare emission at mid-ultraviolet wavelengths around 2000 Å by the channel 2 of the Large-Yield RAdiometer (LYRA) on board the PRoject for OnBoard Autonomy 2 mission. The flare (SOL20170906) was also observed in the channel 1 of LYRA centered at the H I Lyα line at 1216 Å, showing a clear non-thermal profile…
Star Formation Histories of the LEGUS Dwarf Galaxies. II. Spatially Resolved Star Formation History of the Magellanic Irregular NGC 4449
Cignoni, M.; Tosi, M.; Sabbi, E. +16 more
We present a detailed study of the Magellanic irregular galaxy NGC 4449 based on both archival and new photometric data from the Legacy Extragalactic UV Survey, obtained with the Hubble Space Telescope Advanced Camera for Surveys and Wide Field Camera 3. Thanks to its proximity (D = 3.82 ± 0.27 Mpc), we reach stars 3 mag fainter than the tip of th…
Onset of Photospheric Impacts and Helioseismic Waves in X9.3 Solar Flare of 2017 September 6
Kosovichev, Alexander G.; Sharykin, Ivan N.
The X9.3 flare of 2017 September 6, was the most powerful flare of Solar Cycle 24. It generated strong white-light emission and multiple helioseismic waves (sunquakes). By using data from the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory as well as hard X-ray (HXR) data from the KONUS instrument on board the WIND s…
Filament Eruption with a Deflection of Nearly 90 Degrees
Yang, Jiayan; Chen, Hechao; Dai, Jun +2 more
Using the data from the Solar Dynamics Observatory, the Ahead of Solar Terrestrial Relations Observatory, the Global Oscillation Network Group (GONG), and the Large Angle and Spectrometric Coronagraphs, the nearly 90° deflected eruption of a filament and the following coronal mass ejection (CME) occurring on the northern edge of AR 11123 on 2010 N…
The Recoiling Black Hole Candidate 3C 186: Spatially Resolved Quasar Feedback and Further Evidence of a Blueshifted Broad-line Region
Chiaberge, Marco; Capetti, Alessandro; Norman, Colin +1 more
We present the results of integral field spectroscopy of the gravitational wave (GW) recoiling black hole candidate 3C 186. The goal of the observation is to study the kinematics of the [O III]5007 narrow emission-line region (NLR) of the quasar, and investigate the origin of the velocity offsets originally measured for different UV lines. The res…
Wolf 1130: A Nearby Triple System Containing a Cool, Ultramassive White Dwarf
Skiff, Brian A.; Kirkpatrick, J. Davy; Kim, Hwihyun +9 more
Following the discovery of the T8 subdwarf WISE J200520.38+542433.9 (Wolf 1130C), which has a proper motion in common with a binary (Wolf 1130AB) consisting of an M subdwarf and a white dwarf, we set out to learn more about the old binary in the system. We find that the A and B components of Wolf 1130 are tidally locked, which is revealed by the c…