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O VI Recombination Lines in Ultraviolet and Visible Spectra of RR Telescopii
Young, P. R.
Nineteen recombination lines of O VI are identified in ultraviolet and visible spectra of the symbiotic nova RR Telescopii at wavelengths between 1122 and 6203 Å. Only three of the lines have previously been reported from astronomical spectra, and eight lines have never been reported from either astronomical or laboratory spectra. The lines repres…
Discovery of a Pulsar Wind Nebula Candidate in the Cygnus Loop
Katsuda, Satoru; Petre, Robert; Uchida, Hiroyuki +4 more
We report on a discovery of a diffuse nebula containing a pointlike source in the southern blowout region of the Cygnus Loop supernova remnant, based on Suzaku and XMM-Newton observations. The X-ray spectra from the nebula and the pointlike source are well represented by an absorbed power-law model with photon indices of 2.2 ± 0.1 and 1.6 ± 0.2, r…
CARMA Follow-up of the Northern Unconfirmed Planck Galaxy Cluster Candidates
Carpenter, John; Sievers, Jonathan; Muchovej, Stephen +2 more
We present the Combined Array for Research in Millimeter-wave Astronomy (CARMA) observations of the three northern unconfirmed galaxy clusters discovered by the Planck satellite. We confirm the existence of two massive clusters (PLCKESZ G115.71+17.52 and PLCKESZ G121.11+57.01) at high significance. For these clusters, we present refined centroid l…
A Chandra Observation of the Ultraluminous Infrared Galaxy IRAS 19254-7245 (the Superantennae): X-Ray Emission from the Compton-thick Active Galactic Nucleus and the Diffuse Starburst
Heckman, Timothy M.; Reeves, James; Braito, Valentina +2 more
We present a Chandra observation of IRAS 19254-7245, a nearby ultraluminous infrared galaxy also known as the Superantennae. The high spatial resolution of Chandra allows us to disentangle for the first time the diffuse starburst (SB) emission from the embedded Compton-thick active galactic nucleus (AGN) in the southern nucleus. No AGN activity is…
Detection of Low-velocity Collisions in Saturn's F Ring
Cooper, N. J.; Murray, C. D.; Williams, G. A. +1 more
Jets of material extending several hundred kilometers from Saturn's F ring are thought to be caused by collisions at speeds of several tens of ms-1 between ~10 km diameter objects such as S/2004 S 6 and the core of the ring. The subsequent effects of Keplerian shear give rise to the multi-stranded nature of the F ring. Observations of t…
XMM-Newton Observations of Five INTEGRAL Sources Located Towards the Scutum Arm
Tomsick, J. A.; Rodriguez, J.; Bodaghee, A.
Results are presented for XMM-Newton observations of five hard X-ray sources discovered by INTEGRAL in the direction of the Scutum Arm. Each source received gsim20 ks of effective exposure time. We provide refined X-ray positions for all five targets enabling us to pinpoint the most likely counterpart in optical/infrared archives. Spectral and tim…
Extremely Rapid Star Cluster Disruption in High-shear Circumnuclear Starburst Rings: The Unusual Case of NGC 7742
de Grijs, Richard; Anders, Peter
All known mass distributions of recently formed star cluster populations resemble a "universal" power-law function. Here we assess the impact of the extremely disruptive environment in NGC 7742's circumnuclear starburst ring on the early evolution of the galaxy's high-mass (~105-107 M ⊙) star cluster population. Su…
Twist, Writhe, and Helicity in the Inner Penumbra of a Sunspot
Ruiz Cobo, B.; Puschmann, K. G.
The aim of this work is the determination of the twist, writhe, and self-magnetic helicity of penumbral filaments located in an inner sunspot penumbra. For this purpose, we inverted data taken with the spectropolarimeter on board Hinode with the SIR (Stokes Inversion based on Response function) code. For the construction of a three-dimensional geo…
The Discovery of an X-Ray/UV Stellar Flare from the Late-K/Early-M Dwarf LMC 335
Pun, C. S. J.; Kong, A. K. H.; Di Stefano, R. +2 more
We report the discovery of an X-ray/UV stellar flare from the source LMC 335, captured by XMM-Newton in the field of the Large Magellanic Cloud. The flare event was recorded continuously in X-ray for its first 10 hr from the precursor to the late decay phases. The observed fluxes increased by more than two orders of magnitude at its peak in X-ray …
UCAC3 Proper Motion Survey. II. Discovery of New Proper Motion Stars in UCAC3 with 0farcs40 yr-1 > µ >= 0farcs18 yr-1 between Declinations -47° and 00°
Henry, Todd J.; Finch, Charlie T.; Hambly, Nigel C. +2 more
We present 474 new proper motion stellar systems in the southern sky having no previously known components, with 0farcs40 yr-1 >µ >= 0farcs18 yr-1 between declinations -47° and 0°. In this second paper utilizing the U.S. Naval Observatory third CCD Astrograph Catalog (UCAC3) we complete our sweep of the southern s…