Search Publications
PTF 10fqs: A Luminous Red Nova in the Spiral Galaxy Messier 99
Filippenko, Alexei V.; Cenko, S. Bradley; Law, Nicholas M. +39 more
The Palomar Transient Factory (PTF) is systematically charting the optical transient and variable sky. A primary science driver of PTF is building a complete inventory of transients in the local universe (distance less than 200 Mpc). Here, we report the discovery of PTF 10fqs, a transient in the luminosity "gap" between novae and supernovae. Locat…
A statistical study of EMIC wave-associated He+ energization in the outer magnetosphere: Cluster/CODIF observations
Sauvaud, J. -A.; Klecker, B.; Kistler, L. M. +3 more
During the time period of 1 March 2001-1 April 2008, the Composition and Distribution Function (CODIF) Analyzer on board Cluster observed 41 prolonged He+ energization events, lasting for 1.10-4.97 h, on average, 3.18 ± 0.91 h. These He+ heating events occurred predominantly at low/middle magnetic latitudes (MLAT = -4.3°-51.7…
The SWELLS survey - I. A large spectroscopically selected sample of edge-on late-type lens galaxies
Treu, Tommaso; Marshall, Philip J.; Auger, Matthew W. +5 more
The relative contribution of baryons and dark matter to the inner regions of spiral galaxies provides critical clues to their formation and evolution, but it is generally difficult to determine. For spiral galaxies that are strong gravitational lenses, however, the combination of lensing and kinematic observations can be used to break the disc-hal…
Nitrile gas chemistry in Titan's atmosphere
Gautier, Thomas; Carrasco, Nathalie; Szopa, Cyril +3 more
This work presents the first study of the gaseous products resulting from the partial dissociation of methane and nitrogen in the PAMPRE experimental setup simulating Titan's atmospheric chemistry. Using cryogenic trapping, the gaseous products generated from the chemical reactions occurring in the reactor have been trapped. Analyses of these prod…
The Pan-Pacific Planet Search. I. A Giant Planet Orbiting 7 CMa
Endl, Michael; Wittenmyer, Robert A.; Wang, Liang +3 more
We introduce the Pan-Pacific Planet Search, a survey of 170 metal-rich Southern Hemisphere subgiants using the 3.9 m Anglo-Australian Telescope. We report the first discovery from this program, a giant planet orbiting 7 CMa (HD 47205) with a period of 763 ± 17 days, eccentricity e = 0.14 ± 0.06, and msin i = 2.6 ± 0.6 M Jup. The host st…
Insights on the Formation, Evolution, and Activity of Massive Galaxies from Ultracompact and Disky Galaxies at z = 2-3
Papovich, Casey; Dickinson, Mark; Lucas, Ray A. +9 more
We present our results on the structure and activity of massive galaxies at z = 1-3 using one of the largest (166 with M sstarf >= 5 × 1010 M ⊙) and most diverse samples of massive galaxies derived from the GOODS-NICMOS survey: (1) Sérsic fits to deep NIC3 F160W images indicate that the rest-frame optical struct…
The bright unidentifiedγ-ray source 1FGL J1227.9-4852: can it be associated with a low-mass X-ray binary?
Hill, A. B.; Camilo, F.; Dubois, R. +10 more
We present an analysis of high energy (HE; 0.1-300 GeV) γ-ray observations of 1FGL J1227.9-4852 with the Fermi Gamma-ray Space Telescope, follow-up radio observations with the Australia Telescope Compact Array, Giant Metrewave Radio Telescope and Parkes radio telescopes of the same field and follow-up optical observations with the ESO VLT. We also…
Anisotropic Third-Moment Estimates of the Energy Cascade in Solar Wind Turbulence Using Multispacecraft Data
Dasso, S.; Matthaeus, W. H.; Wan, M. +2 more
The first direct determination of the inertial range energy cascade rate, using an anisotropic form of Yaglom’s law for magnetohydrodynamic turbulence, is obtained in the solar wind with multispacecraft measurements. The two-point mixed third-order structure functions of Elsässer fluctuations are integrated over a sphere in magnetic field-aligned …
Optical Polarization and Spectral Variability in the M87 Jet
Perlman, Eric S.; Cara, Mihai; Sparks, William B. +10 more
During the last decade, M87's jet has been the site of an extraordinary variability event, with one knot (HST-1) increasing by over a factor 100 in brightness. Variability has also been seen on timescales of months in the nuclear flux. Here we discuss the optical-UV polarization and spectral variability of these components, which show vastly diffe…
Statistical Study of Chromospheric Anemone Jets Observed with Hinode/SOT
Shibata, K.; Kawate, T.; Nakamura, T. +2 more
The Solar Optical Telescope on board Hinode has revealed numerous tiny jets in all regions of the chromosphere outside of sunspots. A typical chromospheric anemone jet has a cusp-shaped structure and bright footpoint, similar to the shape of an X-ray anemone jet observed previously with the Soft X-ray Telescope on board Yohkoh. The similarity in t…