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Infrared Studies of Molecular Shocks in the Supernova Remnant HB21: I. Thermal Admixture of Shocked H_2 Gas in the North
Jong-Ho Shinn, Bon-Chul Koo, Michael G. Burton +2
We present near- and mid-infrared observations on the shock-cloud interaction region in the northern part of the supernova remnant HB21, performed with the InfraRed Camera (IRC) ab…
Supernova Remnants in the AKARI IRC Survey of the Large Magellanic Cloud
Ji Yeon Seok, Bon-Chul Koo, Takashi Onaka +9
We present the near- to mid-infared study of supernova remnants (SNRs) using the AKARI IRC Survey of the Large Magellanic Cloud (LMC). The LMC survey observed about a 10 square deg…
Discovery of molecular shells associated with supernova remnants. (II) Kesteven 75
Yang Su, Yang Chen, Ji Yang +4
The young composite supernova remnant (SNR) Kesteven 75, with a pulsar wind nebula at its center, has an unusual morphology with a bright southern half-shell structure in multiwave…
Near-Infrared [Fe II] and H2 Line Observations of the Supernova Remnant 3C 396: Probing the Pre-supernova Circumstellar Materials
Ho-Gyu Lee, Dae-Sik Moon, Bon-Chul Koo +2
We present the results of near-infrared [Fe II] and H2 line imaging and spectroscopic observations of the supernova remnant 3C 396 using the Palomar 5 m Hale telescope. We detect l…
Discovery of Molecular Shells Associated with Supernova Remnants. I. Kesteven 69
Xin Zhou, Yang Chen, Yang Su +1
Supernova remnant (SNR) Kes 69 is morphologically characterized by brightened radio, infrared, and X-ray emission on the southeastern rim, with the 1720 MHz OH masers detected in t…
AKARI IRC survey of the Large Magellanic Cloud: Outline of the survey and initial results
Yoshifusa Ita, Takashi Onaka, Daisuke Kato +13
We observed an area of 10 deg^2 of the Large Magellanic Cloud using the Infrared Camera on board AKARI. The observations were carried out using five imaging filters (3, 7, 11, 15,…
Massive-Star Forming Infrared Loop around the Crab-like Supernova Remnant G54.1+0.3: Post Main-Sequence Triggered Star Formation?
Bon-Chul Koo, Christopher F. McKee, Jae-Joon Lee +6
We report the discovery of a star-forming loop around the young, Crab-like supernova remnant (SNR) G54.1+0.3 using the AKARI infrared satellite. The loop consists of at least eleve…
Clumpy photon-dominated regions in Carina. I. [CI] and mid-J CO lines in two 4'x4' fields
C. Kramer, M. Cubick, M. Roellig +31
The Carina region is an excellent astrophysical laboratory for studying the feedback mechanisms of newly born, very massive stars within their natal giant molecular clouds (GMCs) a…
The Infrared Astronomical Mission AKARI
H. Murakami, H. Baba, P. Barthel +90
AKARI, the first Japanese satellite dedicated to infrared astronomy, was launched on 2006 February 21, and started observations in May of the same year. AKARI has a 68.5 cm cooled…
Far-infrared distributions in nearby spiral galaxies NGC2841 and NGC2976 observed with AKARI/FIS
H. Kaneda, T. Suzuki, T. Onaka +9
Far-infrared (IR) images of the nearby Sb galaxy NGC2841 and the Sc galaxy NGC2976 at wavelengths of 65, 90, 140, and 160 um have been obtained with the Far-Infrared Surveyor (FIS)…
Faint HI 21-cm Emission Line Wings at Forbidden-Velocities
Ji-hyun Kang, Bon-Chul Koo
We present the results of a search for faint HI 21-cm emission line wings at velocities forbidden by Galactic rotation in the Galactic plane using the Leiden/Dwingeloo HI Survey da…
A Near-Infrared Study of the Highly-Obscured Active Star-Forming Region W51B
Hyosun Kim, Yasushi Nakajima, Hwankyung Sung +2
We present wide-field JHKs-band photometric observations of the three compact HII regions G48.9-0.3, G49.0-0.3, and G49.2-0.3 in the active star-forming region W51B. The star clust…
SUBARU HDS Observations of a Balmer-Dominated Shock in Tycho's Supernova Remnant
Jae-Joon Lee, Bon-Chul Koo, John Raymond +4
We present an Ha spectral observation of a Balmer-dominated shock on the eastern side of Tycho's supernova remnant using the Subaru Telescope. Utilizing the High Dispersion Spectro…
AKARI Detection of the Infrared-Bright Supernova Remnant B0104-72.3 in the Small Magellanic Cloud
Bon-Chul Koo, Ho-Gyu Lee, Dae-Sik Moon +12
We present a serendipitous detection of the infrared-bright supernova remnant (SNR) B0104-72.3 in the Small Magellanic Cloud by the Infrared Camera (IRC) onboard AKARI. An elongate…
[Fe II] and H2 filaments in the Supernova Remnant G11.2-0.3: Supernova Ejecta and Presupernova Circumstellar Wind
Bon-Chul Koo, Dae-Sik Moon, Ho-Gyu Lee +2
We present the results of near-infrared imaging and spectroscopic observations of the young, core-collapse supernova remnant (SNR) G11.2-0.3. In the [Fe II] 1.644 um image, we firs…
First results from the Arecibo Galactic HI Survey: the disk/halo interface region in the outer Galaxy
Snezana Stanimirovic, Mary Putman, Carl Heiles +11
The consortium for Galactic studies with the Arecibo L-band Feed Array (ALFA) is conducting a neutral hydrogen (HI) survey of the whole Arecibo sky (declination range from -1 to 38…
A "Missing" Supernova Remnant revealed by the 21-cm Line of Atomic Hydrogen
B-C Koo, J-h Kang, C. J. Salter
Although some 20--30,000 supernova remnants (SNRs) are expected to exist in the Milky Way, only about 230 are presently known. This implies that most SNRs are ``missing''. Recently…
HI 21 cm Emission Line Study of Southern Galactic Supernova Remnants
Bon-Chul Koo, Ji-hyun Kang, N. M. McClure-Griffiths
We have searched for HI 21 cm line emission from shocked atomic gas associated with southern supernova remnants (SNRs) using data from the Southern Galactic Plane Survey. Among the…
The environment of Tycho: possible interaction with molecular cloud
Jae-Joon Lee, Bon-Chul Koo, Keni'chi Tatemastu
The Tycho supernova remnant (SNR), as one of the few historical SNRs, has been widely studied in various wavebands. Observations show evidence that Tycho is expanding in a medium w…
HI Study of Southern Galactic Supernova Remnants
Bon-Chul Koo, Ji-hyun Kang, Naomi McClure-Griffiths
We briefly summarize the survey of HI 21 cm emission lines to search for shocked atomic gas associated with Galactic supernova remnants (SNRs) in the southern sky. For G347.3-0.5,…
Molecular Counterparts of Ultracompact HII Regions with Extended Envelopes
Kee-Tae Kim, Bon-Chul Koo
We carried out 13CO J=1-0, CS, and C34S J=2-1 and J=3-2 line observations of molecular clouds associated with 16 ultracompact (UC) HII regions with extended envelopes. The molecula…
Hierarchical Structure of HII Regions - Ultracompact, Compact, and Extended Components
Kee-Tae Kim, Bon-Chul Koo
We have observed extended emission physically associated with 15 out of 16 UC HII regions with large ratios of single-dish to VLA fluxes. We discuss their implications for the age…
Interaction between Ionized and Molecular Gas in the Active Star-Forming Region W31
Kee-Tae Kim, Bon-Chul Koo
We have carried out 21 cm radio continuum, H76_αradio recombination line, and various (CO, ^13CO, CS, & C^34S) molecular line observations of the W31 complex. Our radio continuum d…
An ASCA Study of the W51 Complex
Bon-Chul Koo, Jae-Joon Lee, Frederick D. Seward
We present the analysis of ASCA archival data from the Galactic source W51. The ASCA spectra show that the soft (kT<= 2.5 keV) X-rays are of thermal origin and are compatible with…