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Extended line emission in the BCG of Abell 2390
Drissen, Laurent; Muzzin, Adam; Yee, H. K. C. +10 more
We report CFHT/SITELLE imaging Fourier Transform Spectrograph observations of the brightest cluster galaxy (BCG) of galaxy cluster Abell 2390 at z = 0.228. The BCG displays a prominent cone of emission in H α, H β, [N II], and [O II] to the North-West with PA = 42°, 4.4 arcsec in length (15.9 kpc), which is associated with elongated and asymmetric…
The Complex X-Ray Obscuration Environment in the Radio-loud Type 2 Quasar 3C 223
Heckman, Timothy; Gandhi, Poshak; Yaqoob, Tahir +4 more
3C 223 is a radio-loud, Type 2 quasar at z = 0.1365 with an intriguing X-ray Multi-mirror Mission (XMM)-Newton spectrum that implicated it as a rare, Compton-thick (N H ≳ 1.25 × 1024 cm-2) active galactic nucleus (AGN). We obtained contemporaneous XMM-Newton and Nuclear Spectroscopic Telescope Array (NuSTAR) spectr…
Virial black hole mass estimates of quasars in the XQ-100 legacy survey
Wolf, Christian; Lai, Samuel; Bian, Fuyan +4 more
The black hole (BH) mass and luminosity are key factors in determining how a quasar interacts with its environment. In this study, we utilize data from the European Southern Observatory Large Programme XQ-100, a high-quality sample of 100 X-shooter spectra of the most luminous quasars in the redshift range 3.5 < z < 4.5, and measure the prop…
Unresolved Rossby and gravity modes in 214 A and F stars showing rotational modulation
Bowman, Dominic M.; Pallé, P. L.; Antoci, Victoria +9 more
Here, we report an ensemble study of 214 A- and F-type stars observed by Kepler, exhibiting the so-called hump and spike periodic signal, explained by Rossby modes (r modes) - the hump - and magnetic stellar spots or overstable convective (OsC) modes - the spike, respectively. We determine the power confined in the non-resolved hump features and f…
The MOSDEF-LRIS survey: detection of inflowing gas towards three star-forming galaxies at z 2
Siana, Brian; Shapley, Alice E.; Reddy, Naveen A. +9 more
We report on the discovery of cool gas inflows towards three star-forming galaxies at <z> ~ 2.30. Analysis of Keck Low-Resolution Imaging Spectrometer spectroscopy reveals redshifted low-ionization interstellar (LIS) metal absorption lines with centroid velocities of 60-130 km s-1. These inflows represent some of the most robust d…
The false widow link between neutron star X-ray binaries and spider pulsars
Ingram, Adam; Middleton, Matthew; Rhodes, Lauren +3 more
The discovery of transitional millisecond pulsars (tMSPs) provided conclusive proof that neutron star (NS) low-mass X-ray binaries (LMXBs) comprise part of the evolutionary pathway towards binary millisecond pulsars (MSPs). Redback and black widow 'spider' pulsars are a subcategory of binary MSPs that 'devour' their companions through ablation - t…
The distance to the Serpens South cluster from H2O masers
Gong, Yan; Pillai, Thushara; Loinard, Laurent +3 more
In this Letter we report Very Long Baseline Array observations of 22 GHz water masers toward the protostar
Review and outlook of solar energetic particle measurements on multispacecraft missions
Reames, Donald V.
The earliest evidence of spatial distributions of solar energetic particles (SEPs) compared events from many different source longitudes on the Sun, but the early Pioneers provided the first evidence of the large areas of equal SEP intensities across the magnetically confined "reservoirs" late in the events. More detailed measurements of the impor…
High-energy (>40 MeV) Proton Intensity Enhancements Associated with the Passage of Interplanetary Shocks at 1 au
Lario, D.; Richardson, I. G.; Aran, A. +1 more
We analyze periods with elevated >40 MeV proton intensities observed near Earth over a time span of 43 yr (1973-2016) that coincide with the passage of interplanetary (IP) shocks. Typically, elevated proton intensities result from large solar energetic particle (SEP) events. The IP shocks observed during these elevated-intensity periods may or …
Spectral Retrieval with JWST Photometric data: a Case Study for HIP 65426 b
Wang, Ji
Half of the JWST high-contrast imaging objects will only have photometric data as of Cycle 2. However, to better understand their atmospheric chemistry that informs formation origin, spectroscopic data are preferred. Using HIP 65426 b, we investigate to what extent planet properties and atmospheric chemical abundance can be retrieved with only JWS…