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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2505.05570 |
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| _version_ | 1866910934573776896 |
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| author | Doliva-Dolinsky, Amandine Mutlu-Pakdil, Burçin Crnojević, Denija Anbajagane, Dhayaa Carlin, Jeffrey L. Medoff, Jonah Sand, David J. Tollerud, Erik Lim, Sungsoon Bennet, Paul Drlica-Wagner, Alex Fielder, Catherine E. Hargis, Jonathan R. Herron, Kai Hunter, Laura Congreve Jones, Michael G. Karunakaran, Ananthan Peter, Annika H. G. Romanowsky, Aaron J. Spekkens, Kristine Strader, Jay Willman, Beth Carballo-Bello, Julio A. Cerny, William Chaturvedi, Astha Kallivayalil, Nitya Martínez-Vázquez, Clara E. Medina, Gustavo E. Noël, Noelia E. D. Pace, Andrew B. Riley, Alex H. Sakowska, Joanna D. Smercina, Adam Vivas, Kathy Adamów, Monika Bom, Clecio R. Choi, Yumi Ferguson, Peter S. Navabi, Mahdieh Zenteno, Alfredo COLLABORATION, DELVE |
| author_facet | Doliva-Dolinsky, Amandine Mutlu-Pakdil, Burçin Crnojević, Denija Anbajagane, Dhayaa Carlin, Jeffrey L. Medoff, Jonah Sand, David J. Tollerud, Erik Lim, Sungsoon Bennet, Paul Drlica-Wagner, Alex Fielder, Catherine E. Hargis, Jonathan R. Herron, Kai Hunter, Laura Congreve Jones, Michael G. Karunakaran, Ananthan Peter, Annika H. G. Romanowsky, Aaron J. Spekkens, Kristine Strader, Jay Willman, Beth Carballo-Bello, Julio A. Cerny, William Chaturvedi, Astha Kallivayalil, Nitya Martínez-Vázquez, Clara E. Medina, Gustavo E. Noël, Noelia E. D. Pace, Andrew B. Riley, Alex H. Sakowska, Joanna D. Smercina, Adam Vivas, Kathy Adamów, Monika Bom, Clecio R. Choi, Yumi Ferguson, Peter S. Navabi, Mahdieh Zenteno, Alfredo COLLABORATION, DELVE |
| contents | We report the results of the deepest search to date for dwarf galaxies around NGC3109, a barred spiral galaxy with a mass similar to that of the Small Magellanic Cloud (SMC), using a semi-automated search method. Using the Dark Energy Camera (DECam), we survey a region covering a projected distance of $\sim$70 kpc of NGC 3109 ($D$ = 1.3 Mpc, $R_\mathrm{vir}\sim$ 90 kpc, $M\sim10^8M_\ast$) as part of the MADCASH and DELVE-DEEP programs. Through our resolved and newly designed semi-resolved searches, we successfully recover the known satellites Antlia and Antlia B. We identified a promising candidate, which was later confirmed to be a background dwarf through deep follow-up observations. Our detection limits are well defined, with the sample $\sim 80\%$ complete down to $M_V\sim-$8.0 , and includes detections of dwarf galaxies as faint as $M_V\sim-$6.0. This is the first comprehensive study of a satellite system through resolved star around an SMC mass host. Our results show that NGC 3109 has more bright ($M_V\sim-$9.0) satellites than the mean predictions from cold dark matter (CDM) models, but well within the host-to-host scatter. A larger sample of LMC/SMC-mass hosts is needed to test whether or not the observations are consistent with current model expectations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_05570 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The NGC3109 Satellite System: The First Systematic Resolved Search for Dwarf Galaxies Around a SMC-mass Host Doliva-Dolinsky, Amandine Mutlu-Pakdil, Burçin Crnojević, Denija Anbajagane, Dhayaa Carlin, Jeffrey L. Medoff, Jonah Sand, David J. Tollerud, Erik Lim, Sungsoon Bennet, Paul Drlica-Wagner, Alex Fielder, Catherine E. Hargis, Jonathan R. Herron, Kai Hunter, Laura Congreve Jones, Michael G. Karunakaran, Ananthan Peter, Annika H. G. Romanowsky, Aaron J. Spekkens, Kristine Strader, Jay Willman, Beth Carballo-Bello, Julio A. Cerny, William Chaturvedi, Astha Kallivayalil, Nitya Martínez-Vázquez, Clara E. Medina, Gustavo E. Noël, Noelia E. D. Pace, Andrew B. Riley, Alex H. Sakowska, Joanna D. Smercina, Adam Vivas, Kathy Adamów, Monika Bom, Clecio R. Choi, Yumi Ferguson, Peter S. Navabi, Mahdieh Zenteno, Alfredo COLLABORATION, DELVE Astrophysics of Galaxies We report the results of the deepest search to date for dwarf galaxies around NGC3109, a barred spiral galaxy with a mass similar to that of the Small Magellanic Cloud (SMC), using a semi-automated search method. Using the Dark Energy Camera (DECam), we survey a region covering a projected distance of $\sim$70 kpc of NGC 3109 ($D$ = 1.3 Mpc, $R_\mathrm{vir}\sim$ 90 kpc, $M\sim10^8M_\ast$) as part of the MADCASH and DELVE-DEEP programs. Through our resolved and newly designed semi-resolved searches, we successfully recover the known satellites Antlia and Antlia B. We identified a promising candidate, which was later confirmed to be a background dwarf through deep follow-up observations. Our detection limits are well defined, with the sample $\sim 80\%$ complete down to $M_V\sim-$8.0 , and includes detections of dwarf galaxies as faint as $M_V\sim-$6.0. This is the first comprehensive study of a satellite system through resolved star around an SMC mass host. Our results show that NGC 3109 has more bright ($M_V\sim-$9.0) satellites than the mean predictions from cold dark matter (CDM) models, but well within the host-to-host scatter. A larger sample of LMC/SMC-mass hosts is needed to test whether or not the observations are consistent with current model expectations. |
| title | The NGC3109 Satellite System: The First Systematic Resolved Search for Dwarf Galaxies Around a SMC-mass Host |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2505.05570 |