Blowing Star Formation Away in AGN Hosts (BAH) -- III. Serendipitous discovery of a $z\sim2.9$ star-forming galaxy lensed by the galactic bulge of CGCG 012-070 using JWST NIRSpec
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Riffel, Rogemar A. Melo-Carneiro, Carlos R. Souza-Oliveira, Gabriel Luan Riffel, Rogério Furlanetto, Cristina Zakamska, Nadia L. Arribas, Santiago Bianchin, Marina Chies-Santos, Ana L. Costa-Souza, José Henrique de Mellos, Maitê S. Z. Perna, Michele Storchi-Bergmann, Thaisa |
| author_facet | Riffel, Rogemar A. Melo-Carneiro, Carlos R. Souza-Oliveira, Gabriel Luan Riffel, Rogério Furlanetto, Cristina Zakamska, Nadia L. Arribas, Santiago Bianchin, Marina Chies-Santos, Ana L. Costa-Souza, José Henrique de Mellos, Maitê S. Z. Perna, Michele Storchi-Bergmann, Thaisa |
| contents | We report the detection of a gravitationally lensed galaxy by the nearby spiral galaxy CGCG 012-070 ($z = 0.048$) using Integral Field Unit (IFU) observations with the Near-Infrared Spectrograph (NIRSpec) instrument on board the James Webb Space Telescope (JWST). The lensed galaxy is identified through the flux distributions of emission lines in the rest-frame optical, consistent with a source located at a redshift of $z\sim2.89$. The system is detected in [O III]$λ\lambda4959,5007$, H$β$, and H$α$ emission lines, exhibiting line ratios typical of a star-forming galaxy. The emission-line flux distributions reveal three distinct components, which are modeled using an elliptical power-law (EPL) mass profile for the lens galaxy. This model provides a good characterization of the source and reveals a disturbed star-forming morphology consistent with those of galaxies at cosmic noon. This serendipitous discovery of a rare low-redshift strong lens highlights the critical role of IFU observations in expanding the lens census and advancing our understanding of galaxy mass profiles and evolution. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_06696 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Blowing Star Formation Away in AGN Hosts (BAH) -- III. Serendipitous discovery of a $z\sim2.9$ star-forming galaxy lensed by the galactic bulge of CGCG 012-070 using JWST NIRSpec Riffel, Rogemar A. Melo-Carneiro, Carlos R. Souza-Oliveira, Gabriel Luan Riffel, Rogério Furlanetto, Cristina Zakamska, Nadia L. Arribas, Santiago Bianchin, Marina Chies-Santos, Ana L. Costa-Souza, José Henrique de Mellos, Maitê S. Z. Perna, Michele Storchi-Bergmann, Thaisa Astrophysics of Galaxies We report the detection of a gravitationally lensed galaxy by the nearby spiral galaxy CGCG 012-070 ($z = 0.048$) using Integral Field Unit (IFU) observations with the Near-Infrared Spectrograph (NIRSpec) instrument on board the James Webb Space Telescope (JWST). The lensed galaxy is identified through the flux distributions of emission lines in the rest-frame optical, consistent with a source located at a redshift of $z\sim2.89$. The system is detected in [O III]$λ\lambda4959,5007$, H$β$, and H$α$ emission lines, exhibiting line ratios typical of a star-forming galaxy. The emission-line flux distributions reveal three distinct components, which are modeled using an elliptical power-law (EPL) mass profile for the lens galaxy. This model provides a good characterization of the source and reveals a disturbed star-forming morphology consistent with those of galaxies at cosmic noon. This serendipitous discovery of a rare low-redshift strong lens highlights the critical role of IFU observations in expanding the lens census and advancing our understanding of galaxy mass profiles and evolution. |
| title | Blowing Star Formation Away in AGN Hosts (BAH) -- III. Serendipitous discovery of a $z\sim2.9$ star-forming galaxy lensed by the galactic bulge of CGCG 012-070 using JWST NIRSpec |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2507.06696 |