(2003 July 06 UPDATE)
Nishiura's Researches
Observational Extragalactic
Astronomy
I have two
themes,
[ A ] : Compact Groups of Galaxies
Compact Groups
of Galaxies are very small, isolated, and high number density systems consisted
of from a few to a several galaxies. Their sizes are similar to those of
isolated galaxies and their galaxy number densities are also similar to those of
galaxy clusters. Compact Groups of Galaxies are best target to investigate how
galaxy environments depending on their formations and evolutions.
[ B ] : Active Galactic
Nuclei (AGNs).
There are many galaxies which have
very very luminous nuclei. We call such galaxies as "Active Galaxies" and such
nuclei as "Active Galactic Nuclei (AGNs)". The Active Galactic Nuclei include
Quasi-Stellar Objects (Quasars : QSOs), Radio Galaxies, Seyfert Galaxies, Low
Ionization Narrow Emission line Regions (LINERs), Blazers, BL Lacertae (BL Lac)
Objects. Furthermore Active Galaxies include UltraLuminous InfraRed Galaxies
(ULIRGs), Starburst Galaxies. How process does they have to obtain such a high
energy ?.
My Research Works
------------ Refereed Journal ------------
``Discovery of the Dust Trail of
the Stardust Comet Sample Return Mission Target: 81P/Wild 2''
Ishiguro, M., Kwon, S. M., Sarugaku, Y., Hasegawa, S., Usui, F., Nishiura, S., Nakada, Y., & Yano,
H.
2003, The Astrophysical Journal, 589,
L101.
``Optical Imaging of the
Radiant Points of Leonids during the 2001 Storm with the 105cm Kiso Schmidt
Telescope''
Nishiura,
S., Ohnishi, K., Dobashi, K., Watanabe, J., Miyata, T., & Nakada,
Y.
2002, Pablications of the Astronomical
Society of Japan, 54, L83
``Effects of a Burst of Formation of First-Generation Stars on the
Evolution of Galaxies''
Shioya, Y., Taniguchi, Y.,
Murayama, T., Nishiura, S., Nagao, T., &
Kakazu, Y.
2002, The Astrophysical
Journal, 576, 36.
``A Multi-band
Photometric Study of Tidal Debris in A Compact Group of Galaxies: Seyfert's
Sextet''
Nishiura,
S., Shioya, Y., Murayama, T., Sato, Y., Nagao, T., Taniguchi, Y. &
Sanders, D. B.
2002, Pablications of the
Astronomical Society of Japan, 54, in press
``A Shock-induced Pair of Superbubbles in the
High-Redshift Powerful Radio Galaxy MRC 0406-244''
Taniguchi, Y., Ohyama, Y., Murayama, T., Yoshida, M., Kashikawa, N.,
Iye, M., Aoki, K., Sasaki, T., Kosugi, G., Takata, T., Saito, Y., Kawabata, K.
S., Sekiguchi, K., Okit a, K., Shimizu, Y., Inata, M., Ebizuka, N., Ozawa, T.,
Yadomaru, Y., Taguchi, H., Shioya, Y., Nishiura,
S., Sudou, H., Nagao, T., Noda, S., Koyama, Y., Kakazu, Y., Ajiki, M.,
Fujita, S. S., Kobayashi, R. R.
2001,
Astrophysical Journal, 559, L9
``Deep Optical Imaging of A Compact Group of Galaxies, Seyfert's
Sextet''
Nishiura,
S., Murayama, T., Shimada, M., Sato, Y., Nagao, T., Molikawa, K.,
Taniguchi, Y. & Sanders, D. B.
2000,
Astronomical Journal, 120, 2355 Abstract
``A
Dynamical Study of Galaxies in The Hickson Compact Groups''
Nishiura, S., Shimada, M., Ohyama,
Y., Murayama, T., & Taniguchi, Y.
2000, Astronomical Journal, 120, 1691 Abstract
``The
Nuclear Activity of the Galaxies in the Hickson Compact Groups''
Shimada, M., Ohyama, Y., Nishiura,
S., Murayama, T., & Taniguchi, Y.
2000, Astronomical Journal, 119, 2664 Abstract
``Discovery
of a Low Surface Brightness Object Near Seyfert's Sextet''
Murayama, T., Nishiura, S., Nagao,
T., Sato, Y., Taniguchi, Y., \& Sanders, D. B.
2000, Astronomical Journal, 119, 1691
``Optical versus Mid-infrared Spectroscopic Classification
of Ultraluminous Infrared Galaxies''
Taniguchi, Y.,
Yoshino, A., Ohyama, Y., & Nishiura,
S.
1999, Astrophysical Journal,
514, 660
``Dynamical Mass of Type
2 Seyfert Nuclei''
Nishiura,
S., & Taniguchi, Y.
1998,
Astrophysical Journal, 499, 134
``A Geometrical Relationship between Broad-Line Clouds and an Accretion
Disk around Active Galactic Nuclei''
Nishiura, S., Murayama, T., & Taniguchi, Y.
1998, Pablications of the Astronomical Society of Japan,
50, 31
``Unusual Emission-Line
Regions in the Tidal Arm of NGC 7318B in Stephan's Quintet''
Ohyama, Y., Nishiura, S., Murayama,
T., & Taniguchi, Y.
1998,
Astrophysical Journal Letters, 492, 250
------------ Proceeding etc.
------------
``Galaxy School
2003 - for five years and next''
Nishiura, S.
2003, The
Astronomical Herald (ISSN 0374-2466), 96, 7.
``Deep Optical Imaging of the Compact Group ``Seyfert's
Sextet''''
Nishiura,
S.
2000, Small Galaxy Groups.,
Proceedings of IAU C olloquium 174, eds Valtonen, M. J., & Flynn, C., ASP
Conference Series 209, P. 100
``An Unusual Bubble in the Tidal Arm of NGC7318B in Stephan's
Quintet''
Ohyama, Y., Nishiura, S., Murayama,T., & Taniguchi, Y.
1999, Wolf-Rayet Phenomena in Massive Stars and Starburst
Galaxies., Proceedings of IAU Symposium 193, eds Karel A. van der Hucht, Gloria
Koenigsberger, and Philippe R. J. Eenens., Astronomical Society of the Pacific ,
p.612
``A K-Band Luminosity
Function of Hickson Compact Groups of Galaxies''
Nishiura, S., Murayama,T., Taniguchi, Y., Sato, Y.,
& Sanders, D. B.
1999, Galaxy
Interactions at Low and High Redshift., Proceedings of IAU Symposium 186, eds
Barnes, J. E. and Sanders, D.B., p.415
``Efficient Star-Formation in the Tidal Arms of the Stephan's Quintet
Group of Galaxies''
Ohyama, Y., Nishiura, S., Murayama,T., & Taniguchi, Y.
1999, Galaxy Interactions at Low and High Redshift.,
Proceedings of IAU Symposium 186, eds Barnes, J. E. and Sanders, D.B.,
p.416
``Nuclear Activity in the
Hickson Compact Groups of Galaxies''
Shimada, M., Nishiura, S., Ohyama, Y., Murayama,T., &
Taniguchi, Y.
1999, Galaxy Interactions at
Low and High Redshift., Proceedings of IAU Symposium 186, eds Barnes, J. E. and
Sanders, D.B., p.418
``KISO
H-alpha imaging observations of nearby galaxies''
Hasegawa, T., Sakamoto, S., Nishiura,
S., Ohyama, Y., & Sofue, Y.
1998, Publications Astronomical Society of Australia, 15, 149
Astronomical
Institute, Tohoku University (Written in Only Japanese)
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