Search Publications
A Massive Shell of Supernova-formed Dust in SNR G54.1+0.3
Gelfand, Joseph D.; Temim, Tea; Reynolds, Stephen P. +5 more
While theoretical models of dust condensation predict that most refractory elements produced in core-collapse supernovae (SNe) efficiently condense into dust, a large quantity of dust has so far only been observed in SN 1987A. We present an analysis of observations from the Spitzer Space Telescope, Herschel Space Observatory, Stratospheric Observa…
Dust-trapping Vortices and a Potentially Planet-triggered Spiral Wake in the Pre-transitional Disk of V1247 Orionis
Monnier, John D.; Kraus, Stefan; Wisniewski, John +9 more
The radial drift problem constitutes one of the most fundamental problems in planet formation theory, as it predicts particles to drift into the star before they are able to grow to planetesimal size. Dust-trapping vortices have been proposed as a possible solution to this problem, as they might be able to trap particles over millions of years, al…
X-Rays from the Location of the Double-humped Transient ASASSN-15lh
Sbarufatti, B.; Berger, E.; Dall'Osso, S. +13 more
We present the detection of persistent soft X-ray radiation with {L}x∼ {10}41-1042 erg s-1 at the location of the extremely luminous, double-humped transient ASASSN-15lh as revealed by Chandra and Swift. We interpret this finding in the context of observations from our multiwavelength campaign, which rev…
Dual Maxwellian-Kappa modeling of the solar wind electrons: new clues on the temperature of Kappa populations
Fichtner, H.; Pierrard, V.; Lazar, M. +2 more
Context. Recent studies on Kappa distribution functions invoked in space plasma applications have emphasized two alternative approaches that may assume the temperature parameter either dependent or independent of the power-index κ. Each of them can obtain justification in different scenarios involving Kappa-distributed plasmas, but direct evidence…
CMB Polarization B-mode Delensing with SPTpol and Herschel
Bock, J. J.; Chiang, H. C.; Conley, A. +60 more
We present a demonstration of delensing the observed cosmic microwave background (CMB) B-mode polarization anisotropy. This process of reducing the gravitational-lensing-generated B-mode component will become increasingly important for improving searches for the B modes produced by primordial gravitational waves. In this work, we delens B-mode map…
Nonequilibrium Processes in the Solar Corona, Transition Region, Flares, and Solar Wind (Invited Review)
Krucker, Säm; Meyer-Vernet, Nicole; Del Zanna, Giulio +12 more
We review the presence and signatures of the non-equilibrium processes, both non-Maxwellian distributions and non-equilibrium ionization, in the solar transition region, corona, solar wind, and flares. Basic properties of the non-Maxwellian distributions are described together with their influence on the heat flux as well as on the rates of indivi…
iPTF 16asu: A Luminous, Rapidly Evolving, and High-velocity Supernova
Cenko, S. B.; Sollerman, J.; Hurley, K. +23 more
Wide-field surveys are discovering a growing number of rare transients whose physical origin is not yet well understood. Here we present optical and UV data and analysis of intermediate Palomar Transient Factory (iPTF) 16asu, a luminous, rapidly evolving, high-velocity, stripped-envelope supernova (SN). With a rest-frame rise time of just four day…
Molecular gas on large circumgalactic scales at z = 3.47
Maiolino, R.; Marconi, A.; Ginolfi, M. +9 more
We report the ALMA observations of the most massive (star-forming) galaxy in the redshift range 3 < z < 4 within the whole Great Observatories Origins Deep Survey South field (GOODS-S) field. We detect a large elongated structure of molecular gas around the massive primeval galaxy, traced by the CO(4-3) emission, and extended over 40 kpc. We…
Cross-correlating Planck tSZ with RCSLenS weak lensing: implications for cosmology and AGN feedback
Heymans, Catherine; Hinshaw, Gary; Harnois-Déraps, Joachim +11 more
We present measurements of the spatial mapping between (hot) baryons and the total matter in the Universe, via the cross-correlation between the thermal Sunyaev-Zeldovich (tSZ) map from Planck and the weak gravitational lensing maps from the Red Cluster Sequence Lensing Survey (RCSLenS). The cross-correlations are performed on the map level where …
The Gaia-ESO Survey: Calibration strategy
Gilmore, G.; Bayo, A.; Allende Prieto, C. +60 more
The Gaia-ESO survey (GES) is now in its fifth and last year of observations and has produced tens of thousands of high-quality spectra of stars in all Milky Way components. This paper presents the strategy behind the selection of astrophysical calibration targets, ensuring that all GES results on radial velocities, atmospheric parameters, and chem…