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Combined analysis of galaxy cluster number count, thermal Sunyaev-Zel'dovich power spectrum, and bispectrum
Hurier, G.; Lacasa, F.
The thermal Sunyaev-Zel'dovich (tSZ) effect is a powerful probe of the evolution of structures in the universe, and is thus highly sensitive to cosmological parameters σ8 and Ωm, though its power is hampered by the current uncertainties on the cluster mass calibration. In this analysis we revisit constraints on these cosmolog…
Cross-correlating the γ-ray Sky with Catalogs of Galaxy Clusters
Viel, Matteo; Xia, Jun-Qing; Fornengo, Nicolao +4 more
We report the detection of a cross-correlation signal between Fermi Large Area Telescope diffuse γ-ray maps and catalogs of clusters. In our analysis, we considered three different catalogs: WHL12, redMaPPer, and PlanckSZ. They all show a positive correlation with different amplitudes, related to the average mass of the objects in each catalog, wh…
The Magellanic Inter-Cloud Project (MAGIC) III: first spectroscopic evidence of a dwarf stripping a dwarf
Conn, Blair C.; Carrera, Ricardo; Noël, Noelia E. D. +2 more
The Magellanic Bridge (MB) is a gaseous stream that links the Large (LMC) and Small (SMC) Magellanic Clouds. Current simulations suggest that the MB forms from a recent interaction between the Clouds. In this scenario, the MB should also have an associated stellar bridge formed by stars tidally stripped from the SMC by the LMC. There are several o…
Interstellar gas and X-rays toward the Young supernova remnant RCW 86; pursuit of the origin of the thermal and non-thermal X-ray
Fukui, Y.; Mitsuishi, I.; Reynoso, E. M. +13 more
We have analyzed the atomic and molecular gas using the 21 cm HI and 2.6/1.3 mm CO emissions toward the young supernova remnant (SNR) RCW 86 in order to identify the interstellar medium with which the shock waves of the SNR interact. We have found an HI intensity depression in the velocity range between -46 and - 28 kms-1 toward the SNR…
Old but Still Warm: Far-UV Detection of PSR B0950+08
Pavlov, G. G.; Guillot, S.; Kargaltsev, O. +3 more
We report on a Hubble Space Telescope detection of the nearby, old pulsar B0950+08 (d≃ 262 pc, spin-down age 17.5 Myr) in two far-ultraviolet (FUV) bands. We measured the mean flux densities {\bar{f}}ν =109+/- 6 nJy and 83 ± 14 nJy in the F125LP and F140LP filters (pivot wavelengths 1438 and 1528 Å). Using the FUV data together with pre…
The nearby Type Ibn supernova 2015G: signatures of asymmetry and progenitor constraints
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Wood-Vasey, W. Michael +24 more
We present the results of an extensive observational campaign on the nearby Type Ibn SN 2015G, including data from radio through ultraviolet wavelengths. SN 2015G was asymmetric, showing late-time nebular lines redshifted by ∼1000 km s-1. It shared many features with the prototypical SN Ibn 2006jc, including extremely strong He I emissi…
A Catalog of Stellar Unified Properties (CATSUP) for 951 FGK-Stars within 30 pc
Smith, Graeme H.; Shkolnik, Evgenya L.; Somers, Garrett +6 more
Almost every star in our Galaxy is likely to harbor a terrestrial planet, but accurate measurements of an exoplanet’s mass and radius demand accurate knowledge of the properties of its host star. The imminent TESS and CHEOPS missions are slated to discover thousands of new exoplanets. Along with WFIRST, which will directly image nearby planets, th…
Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems★
Smalley, Barry; Hellier, Coel; Triaud, Amaury H. M. J. +16 more
We report the detection of two new systems containing transiting planets. Both were identified by WASP as worthy transiting planet candidates. Radial velocity observations quickly verified that the photometric signals were indeed produced by two transiting hot Jupiters. Our observations also show the presence of additional Doppler signals. In addi…
MC2: Subaru and Hubble Space Telescope Weak-lensing Analysis of the Double Radio Relic Galaxy Cluster PLCK G287.0+32.9
Koekemoer, Anton M.; Seitz, Stella; Gruen, Daniel +6 more
The second most significant detection of the Planck Sunyaev-Zel’dovich survey, PLCK G287.0+32.9 (z = 0.385), boasts two similarly bright radio relics and a radio halo. One radio relic is located ∼ 400 {kpc} NW of the X-ray peak and the other ∼ 2.8 Mpc to the SE. This large difference suggests that a complex merging scenario is required. A key miss…
Detection of a Hydrogen Corona in HST Lyα Images of Europa in Transit of Jupiter
Roth, Lorenz; Strobel, Darrell F.; Becker, Tracy M. +4 more
We report far-ultraviolet observations of Europa in transit of Jupiter obtained with the Space Telescope Imaging Spectrograph of the Hubble Space Telescope on six occasions between 2014 December and 2015 March. Absorption of Jupiter’s bright hydrogen Lyα dayglow is detected in a region several moon radii above the limb in all observations. The obs…