Search Publications
IRIS Observations of Magnetic Interactions in the Solar Atmosphere between Preexisting and Emerging Magnetic Fields. I. Overall Evolution
Young, Peter R.; Murabito, Mariarita; Guglielmino, Salvo L. +2 more
We report multiwavelength ultraviolet observations taken with the IRIS satellite, concerning the emergence phase in the upper chromosphere and transition region of an emerging flux region (EFR) embedded in the preexisting field of active region NOAA 12529 in the Sun. IRIS data are complemented by full-disk observations of the Solar Dynamics Observ…
Precision charge control for isolated free-falling test masses: LISA pathfinder results
Mendes, L.; Russano, G.; Lloro, I. +83 more
The LISA Pathfinder charge management device was responsible for neutralizing the cosmic-ray-induced electric charge that inevitably accumulated on the free-falling test masses at the heart of the experiment. We present measurements made on ground and in flight that quantify the performance of this contactless discharge system which was based on p…
Hubble PanCET: an isothermal day-side atmosphere for the bloated gas-giant HAT-P-32Ab
Sanz-Forcada, J.; Ehrenreich, D.; Lecavelier des Etangs, A. +21 more
We present a thermal emission spectrum of the bloated hot Jupiter HAT-P-32Ab from a single eclipse observation made in spatial scan mode with the Wide Field Camera 3 (WFC3) aboard the Hubble Space Telescope (HST). The spectrum covers the wavelength regime from 1.123 to 1.644 µm which is binned into 14 eclipse depths measured to an averaged p…
The MUSE-Wide survey: a measurement of the Ly α emitting fraction among z > 3 galaxies
Garel, Thibault; Brinchmann, Jarle; Richard, Johan +15 more
We present a measurement of the fraction of Lyman α (Ly α) emitters (XLy α) amongst HST continuum-selected galaxies at 3 < z < 6 with the Multi-Unit Spectroscopic Explorer (MUSE) on the VLT. Making use of the first 24 MUSE-Wide pointings in GOODS-South, each having an integration time of 1 h, we detect 100 Ly α emitters and find X…
Historical and Contemporary Trends in the Size, Drift, and Color of Jupiter's Great Red Spot
Wong, Michael H.; Orton, Glenn S.; Simon, Amy A. +3 more
Observations of Jupiter’s Great Red Spot (GRS) span more than 150 years. This allows for careful measurements of its size and drift rate. High spatial resolution spacecraft data also allow tracking of its spectral characteristics and internal dynamics and structure. The GRS continues to shrink in longitudinal length at an approximately linear rate…
Statistical Study of Magnetic Nonpotential Measures in Confined and Eruptive Flares
Ravindra, B.; Doddamani, V. H.; Vemareddy, P. +1 more
Using Solar Dynamics Observatory/Helioseismic and Magnetic Imager vector magnetic field observations, we studied the relation between the degree of magnetic non-potentiality with the observed flare/coronal mass ejection (CME) in active regions (ARs). From a sample of 77 flare/CME cases, we found in general that the degree of non-potentiality is po…
Magnetic Reconnection at a Thin Current Sheet Separating Two Interlaced Flux Tubes at the Earth's Magnetopause
Sauvaud, J. -A.; Russell, C. T.; Farrugia, C. J. +31 more
The occurrence of spatially and temporally variable reconnection at the Earth's magnetopause leads to the complex interaction of magnetic fields from the magnetosphere and magnetosheath. Flux transfer events (FTEs) constitute one such type of interaction. Their main characteristics are (1) an enhanced core magnetic field magnitude and (2) a bipola…
The evens and odds of CMB anomalies
Gruppuso, A.; Lattanzi, M.; Mandolesi, N. +3 more
The lack of power of large-angle CMB anisotropies is known to increase its statistical significance at higher Galactic latitudes, where a string-inspired pre-inflationary scale Δ can also be detected. Considering the Planck 2015 data, and relying largely on a Bayesian approach, we show that the effect is mostly driven by the even - ℓ harmonic mult…
HST Grism Observations of a Gravitationally Lensed Redshift 9.5 Galaxy
Hoag, A.; Bradač, M.; Brammer, G. +11 more
We present deep spectroscopic observations of a Lyman break galaxy (LBG) candidate (hereafter MACS1149-JD) at z ∼ 9.5 with the Hubble Space Telescope (HST) WFC3/IR grisms. The grism observations were taken at four distinct position angles, totaling 34 orbits with the G141 grism, although only 19 of the orbits are relatively uncontaminated along th…
The Recent Growth History of the Fornax Cluster Derived from Simultaneous Sloshing and Gas Stripping: Simulating the Infall of NGC 1404
Churazov, Eugene; Jones, Christine; Nulsen, Paul E. J. +7 more
We derive the recent growth history of the Fornax Cluster, in particular the recent infall of the giant elliptical galaxy NGC 1404. We show, using a simple cluster minor merger simulation tailored to Fornax and NGC 1404, that a second or more likely third encounter between the two reproduces all the main merger features observed in both objects; w…