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Searching for cool and cooling X-ray emitting gas in 45 galaxy clusters and groups
Fabian, Andrew C.; Sanders, Jeremy S.; Pinto, Ciro +2 more
We present a spectral analysis of cool and cooling gas in 45 cool-core clusters and groups of galaxies obtained from Reflection Grating Spectrometer (RGS) XMM-Newton observations. The high-resolution spectra show Fe XVII emission in many clusters, which implies the existence of cooling flows. The cooling rates are measured between the bulk intracl…
Searching for environmental effects on galaxy kinematics in groups and clusters at z ∼ 1 from the ORELSE survey
Shen, Lu; Kocevski, Dale D.; Tresse, Laurence +9 more
We present an investigation of the dependence of galaxy kinematics on the environment for a sample of 94 star-forming galaxies at z ∼ 0.9 from the ORELSE survey. ORELSE is a large photometric and spectroscopic campaign dedicated to mapping out and characterizing galaxy properties across a full range of environments in 15 fields containing large-sc…
Scaling relations for globular cluster systems in early-type galaxies
Bassino, Lilia P.; Caso, Juan P.; Ennis, Ana I. +1 more
The formation and growth of globular cluster systems (GCSs) is closely related to the evolutionary processes experienced by their host galaxies. In particular, their radial distributions scale with several properties of the galaxies and their haloes. We performed a photometric study, by means of HST/ACS archival data of several intermediate lumino…
JINGLE, a JCMT legacy survey of dust and gas for galaxy evolution studies: II. SCUBA-2 850 µm data reduction and dust flux density catalogues
Lamperti, Isabella; Saintonge, Amélie; Clark, Christopher J. R. +33 more
We present the SCUBA-2 850µm component of JINGLE, the new JCMT large survey for dust and gas in nearby galaxies, which with 193 galaxies is the largest targeted survey of nearby galaxies at 850 µm. We provide details of our SCUBA-2 data reduction pipeline, optimized for slightly extended sources, and including a calibration model adjus…
Discovery of a pulsar-powered bow shock nebula in the Small Magellanic Cloud supernova remnant DEM S5
Haberl, F.; Filipović, M. D.; Kothes, R. +32 more
We report the discovery of a new Small Magellanic Cloud pulsar wind nebula (PWN) at the edge of the supernova remnant (SNR) DEM S5. The pulsar powered object has a cometary morphology similar to the Galactic PWN analogues PSR B1951+32 and `the mouse'. It is travelling supersonically through the interstellar medium. We estimate the pulsar kick velo…
HERBS I: Metallicity and alpha enhancement along the Galactic bulge minor axis
Freeman, K. C.; Nataf, D. M.; Asplund, M. +3 more
To better understand the origin and evolution of the Milky Way bulge, we have conducted a survey of bulge red giant branch and clump stars using the High Efficiency and Resolution Multi-Element Spectrograph on the Anglo-Australian Telescope. We targeted ARGOS survey stars with predetermined bulge memberships, covering the full metallicity distribu…
Three hot-Jupiters on the upper edge of the mass-radius distribution: WASP-177, WASP-181, and WASP-183
Bouchy, F.; Queloz, D.; Ségransan, D. +21 more
We present the discovery of three transiting planets from the WASP survey, two hot-Jupiters: WASP-177 b (∼0.5 MJup, ∼1.6 RJup) in a 3.07-d orbit of a V = 12.6 K2 star, WASP-183 b (∼0.5 MJup, ∼1.5 RJup) in a 4.11-d orbit of a V = 12.8 G9/K0 star; and one hot-Saturn planet WASP-181 b (∼0.3 MJup,…
New constraints on Lorentz invariance violation with polarized gamma-ray bursts
Wei, Jun-Jie
Lorentz invariance violations (LIV) can yield vacuum birefringence, which results in an energy-dependent rotation of the polarization vector of linearly polarized emission from astrophysical sources. It is believed that if the relative rotation angle (ΔΘ) of the polarization vector of high-energy photons with respect to that of low-energy photons …
NU Ori: a hierarchical triple system with a strongly magnetic B-type star
Grellmann, R.; Wade, G. A.; Lacour, S. +13 more
NU Ori is a massive spectroscopic and visual binary in the Orion Nebula Cluster, with four components: Aa, Ab, B, and C. The B0.5 primary (Aa) is one of the most massive B-type stars reported to host a magnetic field. We report the detection of a spectroscopic contribution from the C component in high-resolution ESPaDOnS spectra, which is also det…
Physical properties and transmission spectrum of the WASP-74 planetary system from multiband photometry
Fossati, L.; Burgdorf, M.; Snodgrass, C. +32 more
We present broad-band photometry of 11 planetary transits of the hot Jupiter WASP-74 b, using three medium-class telescopes and employing the telescope-defocusing technique. Most of the transits were monitored through I filters and one was simultaneously observed in five optical (U, g', r', i', z') and three near-infrared (J, H, K) passbands, for …