인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
High-resolution ($ 0{{\overset{\prime\prime}{.}}}037{-}0{{\overset{\prime\prime}{.}}}13 $ [10 − 35 pc]) e-MERLIN ( λ 6 − 18 cm) and ($ 0{{\overset{\prime\prime}{.}}}024 $ [6.5 pc]) ALMA ( λ 1.1 mm) observations have been used to image OH (hydroxyl) and H 2 CO (formaldehyde) megamaser emission, and HCN 3 → 2 emission toward the nuclear (< 100 pc) region of the luminous infrared galaxy Zw049.057. Zw049.057 hosts a compact obscured nucleus (CON), and thus represents a class of galaxies that are often associated with inflow and outflow motions. Formaldehyde megamaser emission has been detected toward the nuclear region, ≲30 pc ($ 0{{\overset{\prime\prime}{.}}}1 $), and traces a structure along the disk major axis. OH megamaser (OHM) emission has been detected along the minor axis of the disk, ∼30 pc ($ 0{{\overset{\prime\prime}{.}}}1 $) from the nucleus, where it exhibits a velocity gradient with extrema of −20 km s −1 southeast (SE) of the disk and −110 km s −1 northwest (NW) of the disk. HCN 3 → 2 emission reveals extended emission, along the disk minor axis out to ∼60 pc ($ 0{{\overset{\prime\prime}{.}}}2 $). Analysis of the minor axis HCN emission reveals high-velocity features extending out to 600 km s −1 , redshifted on the SE side and blueshifted on the NW side. We propose that the high-velocity HCN emission traces a fast (> 250 km s −1 ) and collimated outflow that is enveloped by a wide-angle and slow (∼50 km s −1 ) outflow that is traced by the OHM emission. Analysis of the outflow kinematics suggests that the slow wide-angle outflow will not reach escape velocity and will instead fall back to the galaxy disk, evolving as a so-called fountain flow, while the fast collimated outflow traced by HCN emission will likely escape the nuclear region. We suggest that the absence of OHM emission in the nuclear region is due to high densities there. Even though OHMs associated with outflows are an exception to conventional OHM emission, we expect them to be common in CON sources that host both OHM and H 2 CO megamasers.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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