18 papers · 1 filter
No Evidence for Variability of Intervening Absorption Lines toward GRB 060206: Implications for the Mg II Incidence Problem
Kentaro Aoki, Tomonori Totani, Takashi Hattori +6
We examine variability of absorption line strength of intervening systems along the line of sight to GRB 060206 at , by the low-resolution optical spectra obtained by the…
Star Formation in the Most Distant Molecular Cloud in the Extreme Outer Galaxy: A Laboratory of Star Formation in an Early Epoch of the Galaxy's Formation
Naoto Kobayashi, Chikako Yasui, Alan T. Tokunaga +1
We report the discovery of active star formation in Digel's Cloud 2, which is one of the most distant giant molecular clouds known in the extreme outer Galaxy (EOG). At the probabl…
The Subaru/XMM-Newton Deep Survey (SXDS) - II. Optical Imaging and Photometric Catalogs
H. Furusawa, G. Kosugi, M. Akiyama +33
We present multi-waveband optical imaging data obtained from observations of the Subaru/XMM-Newton Deep Survey (SXDS). The survey field, centered at R.A.=02:18:00, decl.=-05:00:00,…
Extreme Outer Galaxy: A Laboratory of Star Formation in an Early Epoch of Galaxy Formation
Naoto Kobayashi, Chikako Yasui, Alan T. Tokunaga +1
The extreme outer Galaxy (EOG) has a very different environment from that in the solar neighborhood, with low metallicity (less than -0.5 dex), much lower gas density, and small or…
Star Formation in the Extreme Outer Galaxy: the IMF in a low metallicity environment
Chikako Yasui, Naoto Kobayashi, Alan T. Tokunaga +2
We are conducting a deep near-infrared (NIR) imaging survey of young embedded clusters in the extreme outer Galaxy (hereafter EOG), at the Galactic radius (R_g) of more than 18 kpc…
Luminosity Functions of Lyman-Break Galaxies at z~4 and 5 in the Subaru Deep Field
Makiko Yoshida, Kazuhiro Shimasaku, Nobunari Kashikawa +3
We investigate the luminosity functions of Lyman-break galaxies (LBG) at z~4 and 5 based on the optical imaging data obtained in the Subaru Deep Field Project. Three samples of LBG…