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The Latitude Distribution of Small-scale Magnetic Elements in Solar Cycle 23
Wang, J. X.; Jin, C. L.
With the unique data set from full-disk observations provided by Michelson Doppler Imager on board the Solar and Heliospheric Observatory in the interval embodying solar cycle 23, we have found that the cyclic variations of numbers and total flux of these small-scale magnetic elements covering fluxes of (2.9-32.0) × 1018 Mx and (4.27-38…
Recovery of the Historical SN1957D in X-Rays with Chandra
Soria, Roberto; Blair, William P.; Whitmore, Bradley C. +6 more
SN1957D, located in one of the spiral arms of M83, is one of the small number of extragalactic supernovae (SNe) that has remained detectable at radio and optical wavelengths during the decades after its explosion. Here, we report the first detection of SN1957D in X-rays, as part of a 729 ks observation of M83 with Chandra. The X-ray luminosity (0.…
The Truncated Disk from Suzaku Data of GX 339-4 in the Extreme Very High State
Done, Chris; Ueda, Yoshihiro; Kubota, Aya +4 more
We report on the geometry of accretion disk and high-energy coronae in the strong Comptonization state (the very high/steep power law/hard intermediate state) based on a Suzaku observation of the famous Galactic black hole GX 339-4. These data were taken just before the peak of the 2006-2007 outburst, and the average X-ray luminosity in the 0.7-20…
Extreme Host Galaxy Growth in Powerful Early-epoch Radio Galaxies
Haas, Martin; Barthel, Peter; Wilkes, Belinda +1 more
During the first half of the universe's life, a heyday of star formation must have occurred because many massive galaxies are in place after that epoch in cosmic history. Our observations with the revolutionary Herschel Space Observatory reveal vigorous optically obscured star formation in the ultra-massive hosts of many powerful high-redshift 3C …
Chandra and HST Imaging of the Quasars PKS B0106+013 and 3C 345: Inverse Compton X-Rays and Magnetized Jets
Marshall, H. L.; Kharb, P.; Lister, M. L. +1 more
We present results from deep (~70 ks) Chandra/ACIS observations and Hubble Space Telescope (HST) Advanced Camera for Surveys F475W observations of two highly optically polarized quasars belonging to the MOJAVE blazar sample, viz., PKS B0106+013 and 1641+399 (3C 345). These observations reveal X-ray and optical emissions from the jets in both sourc…
XMM-Newton Observation of PSR B2224+65 and Its Jet
Cheng, K. S.; Takata, J.; Hui, C. Y. +4 more
We have investigated the pulsar PSR B2224+65 and its X-ray jet with XMM-Newton. Apart from the long X-ray jet which is almost perpendicular to the direction of proper motion, a putative extended feature at the pulsar position, which is oriented in the opposite direction to the proper motion, is also suggested by this deep X-ray imaging. Non-detect…
Elusive Ethylene Detected in Saturn's Northern Storm Region
Fletcher, L. N.; Irwin, P. G. J.; Achterberg, R. K. +9 more
The massive eruption at 40°N (planetographic latitude) on Saturn in 2010 December has produced significant and lasting effects in the northern hemisphere on temperature and species abundances. The northern storm region was observed on many occasions in 2011 by Cassini's Composite Infrared Spectrometer (CIRS). In 2011 May, temperatures in the strat…
Herschel Far-infrared Photometric Monitoring of Protostars in the Orion Nebula Cluster
Billot, N.; Megeath, S. T.; Morales-Calderón, M. +2 more
We have obtained time series observations of the Orion Nebula Cluster at 70 µm and 160 µm from the Herschel/PACS Photometer. This represents the first wide-field far-infrared photometric monitoring of a young star-forming region. The acquired 35' × 35' maps show complex extended structures, with unprecedented detail, that trace the int…
Solar Rotation Effects on the Heliosheath Flow near Solar Minima
Pogorelov, Nikolai V.; Borovikov, Sergey N.; Ebert, Robert W.
The interaction between fast and slow solar wind (SW) due to the Sun's rotation creates corotating interaction regions (CIRs), which further interact with each other creating complex plasma structures at large heliospheric distances. We investigate the global influence of CIRs on the SW flow in the inner heliosheath between the heliospheric termin…
The 3.3 µm Polycyclic Aromatic Hydrocarbon Emission as a Star Formation Rate Indicator
Inami, Hanae; Nakagawa, Takao; Oyabu, Shinki +13 more
Polycyclic aromatic hydrocarbon (PAH) emission features dominate the mid-infrared spectra of star-forming galaxies and can be useful to calibrate star formation rates (SFRs) and diagnose ionized states of grains. However, the PAH 3.3 µm feature has not been studied as much as other PAH features since it is weaker than others and resides outs…