71 citations · 246 across the 8 of their papers we have counts for
8 papers
Low-metallicity Young Clusters in the Outer Galaxy. II. Sh 2-208
Chikako Yasui, Naoto Kobayashi, Masao Saito +1
We obtained deep near-infrared images of Sh 2-208, one of the lowest-metallicity HII regions in the Galaxy, [O/H] = -0.8 dex. We detected a young cluster in the center of the HII r…
Low-metallicity Young Clusters in the Outer Galaxy I. Sh 2-207
Chikako Yasui, Naoto Kobayashi, Alan T. Tokunaga +2
To study star formation in low metallicity environments ([M/H] ~ -1 ,dex), we obtained deep near-infrared (NIR) images of Sh 2-207 (S207), which is an HII region in the outer Galax…
Star Formation in the Extreme Outer Galaxy: Digel Cloud 2 Clusters
Chikako Yasui, Naoto Kobayashi, Alan T. Tokunaga +2
As a first step for studying star formation in the extreme outer Galaxy (EOG), we obtained deep near-infrared images of two embedded clusters at the northern and southern CO peaks…
Discovery of Extremely Embedded X-ray Sources in the R Coronae Australis Star Forming Core
Kenji Hamaguchi, Michael F. Corcoran, Rob Petre +5
With the XMM-Newton and Chandra observatories, we detected two extremely embedded X-ray sources in the R Corona Australis (R CrA) star forming core, near IRS 7. These sources, desi…
Near-Infrared Spectroscopy of Very Low-Luminosity Young Stellar Objects in the Taurus Molecular Cloud
Y. Itoh, M. Tamura, A. Tokunaga
We have carried out near-infrared spectroscopic observations of 23 very low-luminosity young stellar object (YSO) candidates and 5 their companions in Heiles Cloud 2, one of the de…
Deep Near Infrared Observations of the X-ray Emitting Class 0 Protostar Candidates in the Orion Molecular Cloud-3
M. Tsujimoto, K. Koyama, Y. Tsuboi +5
We obtained near infrared (NIR) imaging with the Subaru Telescope of the class 0 protostar candidates in the Orion Molecular Cloud-3, two of which were discovered to have X-ray emi…
Imaging and Spatially Resolved Spectroscopy of AFGL 2688 in the Thermal Infrared Region
M. Goto, N. Kobayashi, H. Terada +1
We present ground-based high-resolution (~0".3) imaging of AFGL 2688 at L' (3.8 um) and M'(4.7um). A wealth of structure in the central region is revealed due to less extinction in…
K-Band Spectra and Narrowband Photometry of DENIS Field Brown Dwarfs
A. T. Tokunaga, N. Kobayashi
Infrared spectra at 1.9-2.5 micron and narrowband photometry of three low-mass objects, DENIS-P J0205.4-1159, J1058.7-1547, and J1228.2-1547, are presented. As shown previously by…