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Distribution of jets and magnetic fields in a coronal hole
Curdt, W.; Hara, H.; Watanabe, T. +1 more
Context: Recent observations of ubiquitous jets in coronal holes suggest that they play an important role in coronal heating and solar wind acceleration.
Aims: The aim of our study is to understand the magnetic connectivity and the formation of jets in coronal holes. The study of jets also helps to understand the magnetic field configuration i…
Molecular Gas and the Host-Galaxy System of the z ~ 0.3 QSO PG 1700+518
Tacconi, L. J.; Sanders, D. B.; Frayer, D. T. +7 more
The detection of CO(1→0) emission in the massive (i.e., M H ~ -26.13 mag), z ~ 0.3 host-galaxy system of the broad absorption line quasi-stellar object (QSO) PG1700+518 is reported. The host system has a CO luminosity of L'CO ~ 1.4 × 1010 K km s-1 pc2, and thus a star-forming molecular gas mas…
Modeling a Shallow Solar Dynamo
Schatten, Kenneth H.
Photospheric ephemeral regions (EPRs) cover the Sun like a magnetic carpet. From this, we update the Babcock - Leighton solar dynamo. Rather than sunspot fields appearing in the photosphere de novo from eruptions originating in the deep interior, we consider that sunspots form directly in the photosphere by a rapid accumulation of like-sign field …
Suzaku Observations of Four Heavily Absorbed HMXBs
Kallman, T. R.; Mushotzky, R. F.; Morris, D. C. +4 more
We report on Suzaku observations of four unidentified sources from the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) and Swift-Burst Array Telescope Galactic plane surveys. All the sources have a large neutral hydrogen column density and show properties consistent with being supergiant X-ray binaries or supergiant fast X-ray transient…
The X-Ray Point-Source Population of NGC 1365: The Puzzle of Two Highly-Variable Ultraluminous X-Ray Sources
Komossa, S.; Strateva, Iskra V.
We present 26 point-sources discovered with Chandra within 200'' (≈20 kpc) of the center of the barred supergiant galaxy NGC 1365. The majority of these sources are high-mass X-ray binaries, containing a neutron star or a black hole accreting from a luminous companion at a sub-Eddington rate. Using repeat Chandra and XMM-Newton, as well as optical…
3C 33: another case of photoionized soft X-ray emission in radio galaxies
Bianchi, S.; Ponti, G.; Guainazzi, M. +3 more
We investigate the X-ray spectral properties of 3C 33 by analyzing all the observations available in the Chandra and XMM-Newton archives. In this paper we present a complete X-ray analysis of the nuclear emission of this narrow-line radio galaxy. The broad-band spectrum of 3C 33 is complex. Its hard part resembles that of Seyfert 2 galaxies, which…
Cassini Langmuir probe measurements in the inner magnetosphere of Saturn
Wahlund, J. -E.; Jacobsen, K. S.; Pedersen, A.
In the inner magnetosphere of Saturn, the plasma density and drift velocity are high enough, and the photoelectron current low enough, for a Langmuir probe to produce useful data on ion parameters. Plasma density and velocity are found by analyzing the current due to collected ions and emitted photoelectrons for a negative probe potential. In orde…
An EUV Jet and Hα Filament Eruption Associated with Flux Cancelation in a Decaying Active Region
Chen, Huadong; Ma, Suli; Jiang, Yunchun
Using data from the Transition Region and Coronal Explorer (TRACE), Solar and Heliospheric Observatory (SOHO), Ramaty High Energy Solar Spectroscopic Imager (RHESSI), and Hida Observatory (HO), we present a detailed study of an EUV jet and the associated Hα filament eruption in a major flare in the active region NOAA 10044 on 29 July 2002. In the …
The Relation Between Magnetic Fields and Coronal Activities in the Polar Coronal Hole
Shimojo, Masumi; Tsuneta, Saku
We investigated the relation between polar magnetic fields and polar coronal activities based on Stokes maps of photospheric and chromospheric lines, simultaneous X-ray and EUV images. These images are taken with Hinode and Solar and Heliospheric Observatory. With careful co-alignment between these images, we found that the X-ray jets, the X-ray b…
Submillimeter Continuum Properties of Cold Dust in the Inner Disk and Outflows of M 82
Leeuw, Lerothodi L.; Robson, E. Ian
Deep submillimeter (submm) continuum imaging observations of the starburst galaxy M 82 are presented at 350, 450, 750, and 850 µm wavelengths, which were undertaken with the Submillimeter Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope in Hawaii. The presented maps include a co-addition of submm data mined from the S…