Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Chiyoe Koike"'
Autor:
Kazushige Tomeoka, Carey M. Lisse, Andreas Morlok, Chiyoe Koike, A. B. Mason, Monica M. Grady, Mahesh Anand
Publikováno v:
Icarus. 219:48-56
Mid-infrared (5 micron to 25 micron) transmission/absorption spectra of differentiated meteorites (achondrites) were measured to permit comparison with astronomical observations of dust in different stages of evolution of young stellar objects. In co
Publikováno v:
Journal of Mineralogical and Petrological Sciences. 107:157-166
Autor:
Chiyoe Koike, Takahiro Naoi, Matteo Ferrabone, H. Chihara, Norimasa Shimobayashi, H. Sogawa, Yves Noël, Roberto Dovesi, Hiroshi Suto, Raffaella Demichelis
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 420:147-154
Infrared (IR) spectra provide a rich amount of information concerning chemical composition, lattice structure, size and shape of circumstellar dust. Accurate reference data are then required for the analysis of the various detected components. This s
Autor:
Kazuyoshi Sato, Zhenquan Tan, Hiroya Abe, Chiyoe Koike, H. Chihara, Satoshi Ohara, Kenji Kaneko
Publikováno v:
The Astronomical Journal. 140:1456-1461
Because interstellar dust is closely related to the evolution of matter in the galactic environment and many other astrophysical phenomena, the laboratory synthesis of interstellar dust analogs has received significant attention over the past decade.
Publikováno v:
Icarus. 207:45-53
We present laboratory mid-infrared transmission/absorption spectra obtained from matrix of the hydrated Murchison CM meteorite experimentally shocked at peak pressures of 10–49 GPa, and compare them to astronomical observations of circumstellar dus
Autor:
Chiyoe Koike, Satoshi Ohara, Y. Imai, Shogo Tachibana, Hiroshi Suto, H. Chihara, K. Murata, Akira Tsuchiyama
Publikováno v:
The Astrophysical Journal. 709:983-992
The Infrared Space Observatory (ISO) detected several sharp infrared features around young stars, comets, and evolved stars. These sharp features were identified as Mg-rich crystalline silicates of forsterite and enstatite by comparison with spectra
Publikováno v:
Astronomy & Astrophysics. 507:277-281
We prepared sub-micron olivine (Fo92) particles of different shapes and different degrees of crystal lattice distortion, and studied both effects on the infrared absorption spectra experimentally. We found that the peak positions of the spectra shift
Publikováno v:
The Astrophysical Journal. 698:1903-1906
We carried out experiments of low-temperature infrared spectroscopy and transmission electron microscopy of enstatite (MgSiO3) synthesized by heating of amorphous magnesium silicate. There is a discrepancy between the infrared feature of enstatite ob
Publikováno v:
The Astrophysical Journal. 697:836-842
In order to clarify the crystallization process of silicates in circumstellar environments around young and evolved stars, we performed a laboratory simulation of the crystallization of silicate materials by use of synthetic samples in the MgO-SiO2 s
Publikováno v:
Astronomy & Astrophysics. 501:251-267
To trace the source of the unique 13, 19.5, and 28 $\mu$m emission features in the spectra of oxygen-rich circumstellar shells around AGB stars, we have compared dust extinction spectra obtained by aerosol measurements. We have measured the extinctio