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Origin of Hot Bubble in NGC 6822 Hubble V Star-Forming Region

Published online by Cambridge University Press:  30 October 2019

Hye-In Lee ,
Heeyoung Oh ,
Beomdu Lim ,
Huynh Anh N. Le ,
Sungho Lee ,
Gregory Mace ,
Daniel T. Jaffe ,
Ken’ichi Tatematsu ,
Sangwook Park  and
Soojong Pak
Hye-In Lee
Affiliation:
School of Space Research and Institute of Natural Sciences, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea, emails: hyeinlee@khu.ac.kr, soojong@khu.ac.kr
Heeyoung Oh
Affiliation:
Korea Astronomy and Space Science Institute776, Daedeokdae-ro, Yuseong-gu, Daejeon, 34055, Republic of Korea
Beomdu Lim
Affiliation:
School of Space Research and Institute of Natural Sciences, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea, emails: hyeinlee@khu.ac.kr, soojong@khu.ac.kr
Huynh Anh N. Le
Affiliation:
Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
Sungho Lee
Affiliation:
Korea Astronomy and Space Science Institute776, Daedeokdae-ro, Yuseong-gu, Daejeon, 34055, Republic of Korea
Gregory Mace
Affiliation:
Department of Astronomy, the University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, Texas 78712-1205, USA
Daniel T. Jaffe
Affiliation:
Department of Astronomy, the University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, Texas 78712-1205, USA
Ken’ichi Tatematsu
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JAPAN
Sangwook Park
Affiliation:
Physics Department, University of Texas at ArlingtonBox 19059, Arlington, Texas 76019, USA
Soojong Pak
Affiliation:
School of Space Research and Institute of Natural Sciences, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea, emails: hyeinlee@khu.ac.kr, soojong@khu.ac.kr
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Abstract

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We observed a bright H II complex, Hubble V in NGC 6822, using the high-resolution near-infrared spectrograph IGRINS (R = 45,000) attached on the 2.7 m telescope at the McDonald Observatory. We carried out a spectral mapping over a 15″ × 18″ region in the H and K bands using a slit-scanning technique. The emission lines Brγ and He i from ionized regions as well as molecular hydrogen lines from photo-dissociation regions (PDRs), were detected. We show three-dimensional maps of the emission lines and discuss the possibility of an expanding hot bubble structure within which many ionized components are around the central stellar cluster.

Keywords

galaxies: dwarfgalaxies: irregulargalaxies: kinematics and dynamicsgalaxies: Local Groupinfrared: galaxiesinstrumentation: spectrographs

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