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Color-Magnitude Sequence in the Clusters at z ~ 1.2 near the Radio Galaxy 3C 324
Terada, Hiroshi; Usuda, Tomonori; Imanishi, Masatoshi +17 more
We have investigated the optical and near-infrared colors of K'-selected galaxies in clusters at z ~ 1.2 near to the radio galaxy 3C 324 using images obtained with the Subaru telescope and archival HST data. The distribution of colors of the galaxies in the cluster region is found to be fairly broad, and it may imply significant scatter in their s…
Galactic Rotation Derived from OB Stars Using Hipparcos Proper Motions and Radial Velocities
Uemura, Makoto; Kato, Taichi; Hirata, Ryuko +3 more
We have examined the systematic velocity field of the solar neighborhood, based on Hipparcos (HIgh Precision PARallax COllecting Satellite) proper motions and ground-based radial velocities of about 240 O-B5 stars. The distances of these stars were derived from either Hipparcos parallaxes or the SKYMAP compilation of the spectroscopic parallaxes. …
Subaru First-Light Deep Photometry of Galaxies in A 851 Field
Kobayashi, Naoto; Terada, Hiroshi; Usuda, Tomonori +96 more
We report on the results of optical and near-infrared photometry of the cluster of galaxies A 851 (=CL 0939+4713) carried out as one of the first-light observations of the 8.2 m Subaru telescope on Mauna Kea. Images as sharp as 0.''3 FWHM in K' and 0.''45 in R were obtained in these observations. The 3 sigma limiting magnitudes for points sources …
Kinematics of the Galaxy from Hipparcos Proper Motions
Zhu, Zi
From Hipparcos proper motions, we have analysed the local kinematics of the Milky Way from young O-B5 stars, classical Cepheids, and the late-type K-M giants. The components of solar motion along the direction pointing to the galactic center from the Sun u_0 and along the direction pointing to the north galactic pole w_0 are approximately 10 km s<…
Tridimensional Spectrophotometric Study of the Extended Emission-Line Regions of the Infrared-Luminous Merger Markarian 266
Yoshida, Michitoshi; Hattori, Takashi; Ishigaki, Tsuyoshi +6 more
An extensive tridimensional spectrophotometric study of the extended emission-line regions of Mrk 266, a merging system of a Seyfert galaxy and a LINER, was performed. We obtained its narrow-band images of Hα , [O III] lambda 5007, and [S II] lambda lambda 6716, 6731 using an imaging Fabry-Perot interferometer with a tunable filter and area spectr…
Some Features of Manifestations of Coronal Holes in Microwave Emission
Grechnev, Victor V.; Krissinel, Boris B.; Kuznetsova, Svetlana M. +4 more
Using observational data from the SSRT, we have investigated the behavior of four mid- and low-latitude coronal holes. The coronal holes under study appeared as regions of decreased emission intensity relative to the quiet Sun level totally or partially coincident with holes in EUV emission. Difference in the electron density and temperature in di…
High-Resolution Near-Infrared Imaging of the Powerful Radio Galaxy 3C 324 at z = 1.21 with the Subaru Telescope
Terada, Hiroshi; Usuda, Tomonori; Imanishi, Masatoshi +18 more
We have obtained high-resolution K'-band images of the powerful z=1.206 radio galaxy 3C 324 with the Subaru telescope under seeing conditions of 0.''3-0.''4. We clearly resolved the galaxy and directly compared it to the optical images obtained with the Hubble Space Telescope. The host galaxy of 3C 324 is revealed …
ISO Observations of the Planetary Nebula Lindsay 305 in the Small Magellanic Cloud
Tanabé, Toshihiko; Sauvage, Marc; Vansevičius, Vladas +1 more
We present ISO (Infrared Space Observatory) observations of the planetary nebula Lindsay 305 (L 305) in the Small Magellanic Cloud. L 305 is very prominent in the ISOCAM frames at 6.75 and 11.5 mu m, although it is under the detection limit at 4.5 mu m. The obtained spectral energy distribution shows a strong mid-IR excess, which, depending on the…