82 citations · 470 across the 28 of their papers we have counts for
28 papers
Intergalactic dust and its photoelectric heating
Akio K. Inoue, Hideyuki Kamaya
We have examined the dust photoelectric heating in the intergalactic medium (IGM). The heating rate in a typical radiation field of the IGM is represented by $Γ_{\rm pe} = 1.2\time…
Small Structures via Thermal Instability of Partially Ionized Plasma. I. Condensation Mode
Tsubasa Fukue, Hideyuki Kamaya
(Shortened) Thermal instability of partially ionized plasma is investigated by linear perturbation analysis. According to the previous studies under the one fluid approach, the the…
Comments on a faint old stellar system at 150 kpc
Hideyuki Kamaya
Context.Recent study of SDSS J1257+3419 has revealed that this stellar system is either a faint and small dwarf galaxy or a faint and widely extended globular cluster (see also arX…
The Faint Stellar Object SDSS J1257+3419 is a Dark Matter Dominated System
Hideyuki Kamaya
A recent study has revealed SDSS J1257+3419 is either a faint and small dwarf galaxy or a faint and widely extended globular cluster. In this Letter, the author suggests this stell…
Interpretation of the expansion law of planetary nebulae
Hiroko Matsumoto, Tsubasa Fukue, Hideyuki Kamaya
We reproduce the expansion velocity--radius (--) relation in planetary nebulae by considering a simple dynamical model, in order to investigate the dynami…
Lyman Alpha Line Spectra of the First Galaxies: Dependence on Observed Direction to the Underlying CDM Filament
Masakazu A. R. Kobayashi, Hideyuki Kamaya, Atsunori Yonehara
The first galaxies in the Universe are built up where cold dark matter (CDM) forms large scale filamentary structure. Although the galaxies are expected to emit numerous Lya photon…