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Swift Follow-up Observations of Candidate Gravitational-wave Transient Events
Liu, Y.; Lee, H. M.; Foley, S. +815 more
We present the first multi-wavelength follow-up observations of two candidate gravitational-wave (GW) transient events recorded by LIGO and Virgo in their 2009-2010 science run. The events were selected with low latency by the network of GW detectors (within less than 10 minutes) and their candidate sky locations were observed by the Swift observa…
TNOs are cool: A survey of the trans-Neptunian region. V. Physical characterization of 18 Plutinos using Herschel-PACS observations
Fornasier, S.; Hartogh, P.; Pál, A. +18 more
Context. The Herschel open time key programme TNOs are Cool: A survey of the trans-Neptunian region aims to derive physical and thermal properties for a set of ~140 Centaurs and trans-Neptunian objects (TNOs), including resonant, classical, detached and scattered disk objects. One goal of the project is to determine albedo and size distributions f…
Galaxy Disks Do Not Need to Survive in the ΛCDM Paradigm: The Galaxy Merger Rate Out to z ~ 1.5 from Morpho-kinematic Data
Flores, H.; Hammer, F.; Puech, M. +5 more
About two-thirds of present-day, large galaxies are spirals such as the Milky Way or Andromeda, but the way their thin rotating disks formed remains uncertain. Observations have revealed that half of their progenitors, six billion years ago, had peculiar morphologies and/or kinematics, which exclude them from the Hubble sequence. Major mergers, i.…
Triggered star formation in the inner filament of Centaurus A
Mutchler, Max; Whitmore, Bradley C.; Shabala, Stanislav S. +7 more
We present recent Hubble Space Telescope observations of the inner filament of Centaurus A, using the new Wide Field Camera 3 (WFC3) F225W, F657N and F814W filters. We find a young stellar population near the south-west tip of the filament. Combining the WFC3 data set with archival Advanced Camera for Surveys (ACS) F606W observations, we are able …
Multi-wavelength Observations of the Radio Magnetar PSR J1622-4950 and Discovery of Its Possibly Associated Supernova Remnant
Esposito, Paolo; Rea, Nanda; Drake, Jeremy J. +29 more
We present multi-wavelength observations of the radio magnetar PSR J1622-4950 and its environment. Observations of PSR J1622-4950 with Chandra (in 2007 and 2009) and XMM (in 2011) show that the X-ray flux of PSR J1622-4950 has decreased by a factor of ~50 over 3.7 years, decaying exponentially with a characteristic time of τ = 360 ± 11 days. This …
The fast evolution of SN 2010bh associated with XRF 100316D
Greiner, J.; Klose, S.; Schady, P. +13 more
Context. The first observational evidence of a connection between supernovae (SNe) and gamma-ray bursts (GRBs) was found about a decade ago. Since then, only half a dozen spectroscopically confirmed associations have been discovered and XRF 100316D/SN 2010bh is among the latest.
Aims: We constrain the progenitor radius, the host-galaxy extinc…
Evaluating the role of sulfide-weathering in the formation of sulfates or carbonates on Mars
Mangold, N.; Chevrier, V.; Dehouck, E. +3 more
Orbital and landed missions to Mars have revealed complex sulfate- and Fe-oxide-bearing mineralogical assemblages, which have been interpreted as the result of a late planet-wide acidic period due to large SO2 emissions. However, this global scenario does not explain the recent discovery of Hesperian and Noachian-aged carbonates in seve…
On the Occurrence of the Third-order Scaling in High Latitude Solar Wind
Bruno, R.; Carbone, V.; Veltri, P. +3 more
The occurrence and nature of a nonlinear energy cascade within the intermediate scales of solar wind Alfvénic turbulence represents an important open issue. Using in situ measurements of fast, high latitude solar wind taken by the Ulysses spacecraft at solar minima, it is possible to show that a nonlinear energy cascade of imbalanced turbulence is…
Dual periodicities in planetary-period magnetic field oscillations in Saturn's tail
Coates, A. J.; Dougherty, M. K.; Jackman, C. M. +5 more
We examine magnetic field data from 10 apoapsis passes of the Cassini spacecraft during 2006 when the spacecraft explored the midnight and dawn sectors of Saturn's magnetotail to down-tail distances of ∼65 RS (Saturn radius, RS, is 60,268 km). Oscillations in the radial component of the field near the ∼11 hour planetary perio…
Complex Gas Kinematics in Compact, Rapidly Assembling Star-forming Galaxies
Amorín, R.; Pérez-Montero, E.; Vílchez, J. M. +3 more
Deep, high-resolution spectroscopic observations have been obtained for six compact, strongly star-forming galaxies at redshift z ~ 0.1-0.3, most of them also known as green peas. Remarkably, these galaxies show complex emission-line profiles in the spectral region including Hα, [N II] λλ6548, 6584, and [S II] λλ6717, 6731, consisting of the super…