New Insights in the Bubble Wall of NGC 3324: Intertwined Substructures and a Bipolar Morphology Uncovered by JWST
- Title
- New Insights in the Bubble Wall of NGC 3324: Intertwined Substructures and a Bipolar Morphology Uncovered by JWST
- Creator
- Dewangan L.K.; Maity A.K.; Mayya Y.D.; Bhadari N.K.; Bhattacharyya S.; Sharma S.; Banerjee G.
- Description
- We report the discovery of intertwined/entangled substructures toward the bubble wall of NGC 3324 below a physical scale of 4500 au, which is the sharp edge/ionization front/elongated structure traced at the interface between the H ii region and the molecular cloud. The sharp edge appears wavy in the Spitzer 3.6-8.0 ?m images (resolution ?2?). Star formation signatures have mostly been traced on one side of the ionization front, which lies on the molecular clouds boundary. The James Webb Space Telescopes (JWST) near- and mid-infrared images (resolution ?0.?070.?7) are employed to resolve the sharp edge, which has a curvature facing the exciting O-type stars. The elongated structures are associated with the 3.3 ?m polycyclic aromatic hydrocarbon (PAH) emission, the 4.05 ?m ionized emission, and the 4.693 ?m H2 emission. However, the PAH-emitting structures are depicted between the other two. The H2 emission reveals numerous intertwined substructures that are not prominently traced in the 3.3 ?m PAH emission. The separation between two substructures in the H2 emission is ?1.?1 or 2420 au. The intertwined substructures are traced in the spatial areas associated with the neutral to H2 transition zone, suggesting the origin of these structures by thin-shell instability. Furthermore, an arc-like feature traced in the Spitzer 3.6-8.0 ?m images is investigated as a bipolar H ii region (extent ?0.35 pc) at T d ?25-28 K using the JWST images. A massive-star candidate VPHAS-OB1 #03518 seems to be responsible for the bipolar H ii region. 2023. The Author(s). Published by the American Astronomical Society.
- Source
- Astrophysical Journal, Vol-958, No. 1
- Date
- 2023-01-01
- Publisher
- Institute of Physics
- Coverage
- Dewangan L.K., Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, 380009, India; Maity A.K., Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, 380009, India, Indian Institute of Technology Gandhinagar Palaj, Gandhinagar, 382355, India; Mayya Y.D., Instituto Nacional de Astrofica, tica y Electrica, Luis Enrique Erro # 1, Tonantzintla, Puebla, C.P. 72840, Mexico; Bhadari N.K., Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, 380009, India, Indian Institute of Technology Gandhinagar Palaj, Gandhinagar, 382355, India; Bhattacharyya S., Department of Physics and Electronics, CHRIST (Deemed to be University, Hosur Main Road, Bangalore, 560029, India; Sharma S., Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital, 263002, India; Banerjee G., Department of Physics and Electronics, CHRIST (Deemed to be University, Hosur Main Road, Bangalore, 560029, India
- Rights
- All Open Access; Gold Open Access; Green Open Access
- Relation
- ISSN: 0004637X
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Dewangan L.K.; Maity A.K.; Mayya Y.D.; Bhadari N.K.; Bhattacharyya S.; Sharma S.; Banerjee G., “New Insights in the Bubble Wall of NGC 3324: Intertwined Substructures and a Bipolar Morphology Uncovered by JWST,” CHRIST (Deemed To Be University) Institutional Repository, accessed April 8, 2025, https://archives.christuniversity.in/items/show/14009.