Search Publications
The Properties of Horizontal Magnetic Elements in Quiet Solar Intranetwork
Wang, Jingxiu; Jin, Chunlan; Zhou, Guiping
Using the data observed by the Solar Optical Telescope/Spectropolarimeter aboard the Hinode satellite, the horizontal and vertical fields are derived from the wavelength-integrated measures of Zeeman-induced linear and circular polarizations. The quiet intranetwork regions are pervaded by horizontal magnetic elements. We categorize the horizontal …
Wide-Field Near-Infrared Imaging of the L1551 Dark Cloud
Pyo, Tae-Soo; Hayashi, Masahiko
We present wide-field near-infrared images of the densest part of the L1551 dark cloud taken with the narrow-band filters for [Fe II] λ 1.644 µm and H2 v = 1-0 S(1) lines, together with the broadband H and K s filters. Numerous [Fe II] and H2 emission features were detected from the regions around HL/XZ Tau, …
Young Energetic PSR J1617-5055, Its Nebula, and TeV Source HESS J1616-508
Pavlov, G. G.; Kargaltsev, O.; Wong, J. A.
We observed the young pulsar J1617-5055 with the Chandra ACIS detector for 60 ks. In addition to the pulsar, the X-ray images show a faint pulsar wind nebula (PWN) seen up to ~1' from the pulsar. Deconvolution and reconstruction of the image reveal a brighter compact PWN component of ~1'' size. The total PWN luminosity in the 0.5-8 keV band, L
Stellar abundances and ages for metal-rich Milky Way globular clusters. Stellar parameters and elemental abundances for 9 HB stars in NGC 6352
Primas, F.; Feltzing, S.; Johnson, R. A.
Context: Metal-rich globular clusters provide important tracers of the formation of our Galaxy. Moreover, and not less important, they are very important calibrators for the derivation of properties of extra-galactic metal-rich stellar populations. Nonetheless, only a few of the metal-rich globular clusters in the Milky Way have been studied using…
Suzaku Observations of Metallicity Distribution in the Intracluster Medium of the NGC 5044 Group
Sato, Kosuke; Ohashi, Takaya; Matsushita, Kyoko +2 more
The metallicity distribution in the intracluster medium of the NGC 5044 group was studied up to 0.3r180 using the XIS instrument aboard the Suzaku satellite. The abundances of O, Mg, Si, S, and Fe were measured with high accuracy. The region within a radius of 0.05r180 from the center shows approximately solar abundances of M…
Vortex circulation on Venus: Dynamical similarities with terrestrial hurricanes
Piccioni, Giuseppe; Markiewicz, Wojciech J.; Limaye, Sanjay S. +3 more
Some dynamical and morphological similarities exist between the vortex organization of the atmosphere in the northern and southern hemispheres of Venus and the tropical cyclones/hurricanes on Earth. An S-shape feature detected in the center of the vortices on Venus from Pioneer Venus Orbiter and Venus Express observations has also been seen in tro…
Interaction between granulation and small-scale magnetic flux observed by Hinode
Zhang, Jun; Jin, Chun-Lan; Yang, Shu-Hong
With the polarimetric observations obtained by the Spectro-Polarimeter on board Hinode, we study the relationship between granular development and magnetic field evolution in the quiet Sun. Six typical cases are displayed to exhibit interaction between granules and magnetic elements, and we have obtained the following results. (1) A granule develo…
LAPLACE: A mission to Europa and the Jupiter System for ESA's Cosmic Vision Programme
Drossart, Pierre; Hartogh, Paul; Sotin, Christophe +40 more
The exploration of the Jovian System and its fascinating satellite Europa is one of the priorities presented in ESA’s “Cosmic Vision” strategic document. The Jovian System indeed displays many facets. It is a small planetary system in its own right, built-up out of the mixture of gas and icy material that was present in the external region of the …
Jets in Polar Coronal Holes
Doyle, J. G.; Erdélyi, R.; Banerjee, D. +2 more
Here, we explore the nature of small-scale jet-like structures and their possible relation to explosive events and other known transient features, like spicules and macrospicules, using high-resolution spectroscopy obtained with the Solar and Heliospheric Observatory/Solar Ultraviolet Measurements of Emitted Radiation instrument. We present a high…
Rings and haloes in the mid-infrared: the planetary nebulae NGC 7354 and NGC 3242
Ramos-Larios, G.; Schröder, K. -P.; Phillips, J. P. +1 more
We present images of the planetary nebulae NGC 7354 and NGC 3242 in four mid-infrared (MIR) photometric bands centred at 3.6, 4.5, 5.8 and 8.0 µm, the results of observations undertaken using the Spitzer Space Telescope. The resulting images show the presence of a halo and rings in NGC 3242, as previously observed through narrow-band imaging…