Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST
We present a joint analysis of high-resolution CO(2–1) and Paschen- α (Pa α ) emission lines to trace gas dynamics and spatially resolved star formation in ASPECS-LP.3 mm.06, a z = 1.1 main-sequence galaxy. Utilizing data from the Atacama Large Millimeter/submillimeter Array and JWST NIRCam wide fie...
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2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ada937 |
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| author | Zhaoran Liu Tadayuki Kodama Takahiro Morishita Kianhong Lee Fengwu Sun Mariko Kubo Zheng Cai Yunjing Wu Zihao Li |
| author_facet | Zhaoran Liu Tadayuki Kodama Takahiro Morishita Kianhong Lee Fengwu Sun Mariko Kubo Zheng Cai Yunjing Wu Zihao Li |
| author_sort | Zhaoran Liu |
| collection | DOAJ |
| description | We present a joint analysis of high-resolution CO(2–1) and Paschen- α (Pa α ) emission lines to trace gas dynamics and spatially resolved star formation in ASPECS-LP.3 mm.06, a z = 1.1 main-sequence galaxy. Utilizing data from the Atacama Large Millimeter/submillimeter Array and JWST NIRCam wide field slitless spectroscopy, we explore both ionized gas and molecular gas within this galaxy. With a substantial molecular gas fraction ( f _mol = 0.44 ± 0.02), ASPECS-LP.3 mm.06 remains on the star-forming main sequence and adheres to the Kennicutt–Schmidt relation, indicating typical gas-to-star conversion efficiency. Our analysis reveals extended structures across multiple wavelengths, suggesting regulated star formation within a stable disk. The spatially resolved star formation efficiency and kinematic analysis indicate that ASPECS-LP.3mm.06 features a smooth mass assembly process across the bulge and disk. Additionally, the galaxy exhibits modest dust extinction ( A _V = 0.8), potentially linked to self-regulation during bulge formation. These findings position ASPECS-LP.3mm.06 as a prototypical galaxy, offering valuable insights into the mechanisms governing normal disk galaxy growth at z ∼ 1. |
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| id | doaj-art-66faae1fe0bc46f7a0971e0bfe938c79 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-66faae1fe0bc46f7a0971e0bfe938c792025-02-05T13:17:38ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198016910.3847/1538-4357/ada937Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWSTZhaoran Liu0https://orcid.org/0009-0002-8965-1303Tadayuki Kodama1https://orcid.org/0000-0002-2993-1576Takahiro Morishita2https://orcid.org/0000-0002-8512-1404Kianhong Lee3https://orcid.org/0000-0003-4814-0101Fengwu Sun4https://orcid.org/0000-0002-4622-6617Mariko Kubo5https://orcid.org/0000-0002-7598-5292Zheng Cai6https://orcid.org/0000-0001-8467-6478Yunjing Wu7https://orcid.org/0000-0003-0111-8249Zihao Li8https://orcid.org/0000-0001-5951-459XAstronomical Institute, Graduate School of Science, Tohoku University , 6-3 Aoba, Sendai 980-8578, Japan ; zhaoran.liu@astr.tohoku.ac.jpAstronomical Institute, Graduate School of Science, Tohoku University , 6-3 Aoba, Sendai 980-8578, Japan ; zhaoran.liu@astr.tohoku.ac.jpIPAC, California Institute of Technology , MC 314-6, 1200 E. California Boulevard, Pasadena, CA 91125, USAAstronomical Institute, Graduate School of Science, Tohoku University , 6-3 Aoba, Sendai 980-8578, Japan ; zhaoran.liu@astr.tohoku.ac.jp; National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USAAstronomical Institute, Graduate School of Science, Tohoku University , 6-3 Aoba, Sendai 980-8578, Japan ; zhaoran.liu@astr.tohoku.ac.jpDepartment of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of ChinaDepartment of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of ChinaCosmic Dawn Center (DAWN) , Copenhagen, Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen N, DenmarkWe present a joint analysis of high-resolution CO(2–1) and Paschen- α (Pa α ) emission lines to trace gas dynamics and spatially resolved star formation in ASPECS-LP.3 mm.06, a z = 1.1 main-sequence galaxy. Utilizing data from the Atacama Large Millimeter/submillimeter Array and JWST NIRCam wide field slitless spectroscopy, we explore both ionized gas and molecular gas within this galaxy. With a substantial molecular gas fraction ( f _mol = 0.44 ± 0.02), ASPECS-LP.3 mm.06 remains on the star-forming main sequence and adheres to the Kennicutt–Schmidt relation, indicating typical gas-to-star conversion efficiency. Our analysis reveals extended structures across multiple wavelengths, suggesting regulated star formation within a stable disk. The spatially resolved star formation efficiency and kinematic analysis indicate that ASPECS-LP.3mm.06 features a smooth mass assembly process across the bulge and disk. Additionally, the galaxy exhibits modest dust extinction ( A _V = 0.8), potentially linked to self-regulation during bulge formation. These findings position ASPECS-LP.3mm.06 as a prototypical galaxy, offering valuable insights into the mechanisms governing normal disk galaxy growth at z ∼ 1.https://doi.org/10.3847/1538-4357/ada937Galaxy evolutionInterstellar mediumGalaxy structure |
| spellingShingle | Zhaoran Liu Tadayuki Kodama Takahiro Morishita Kianhong Lee Fengwu Sun Mariko Kubo Zheng Cai Yunjing Wu Zihao Li Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST The Astrophysical Journal Galaxy evolution Interstellar medium Galaxy structure |
| title | Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST |
| title_full | Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST |
| title_fullStr | Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST |
| title_full_unstemmed | Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST |
| title_short | Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST |
| title_sort | deciphering gas dynamics and star formation in a z 1 1 main sequence spiral galaxy with alma and jwst |
| topic | Galaxy evolution Interstellar medium Galaxy structure |
| url | https://doi.org/10.3847/1538-4357/ada937 |
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