ALMA Central Molecular Zone Exploration Survey (ACES) II: 3mm continuum images
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arXiv
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2026
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| author | Ginsburg, Adam Walker, Daniel L. Barnes, Ashley T. Lu, Xing Sánchez-Monge, Álvaro Pineda, Jaime E. Pound, Marc W. Hsieh, Pei-Ying Immer, Katharina Zhang, Qizhou Budaiev, Nazar Gramze, Savannah R. Jeff, Desmond Cook, Claire Bulatek, Alyssa Mills, Elisabeth A. C. Bally, John Colzi, Laura García, Pablo Henshaw, Jonathan D. Jiménez-Serra, Izaskun Klessen, Ralf S. Dicker, Simon R. Longmore, Steven N. Nogueras-Lara, Francisco Rivilla, Víctor M. Santa-Maria, Miriam G. Wang, Q. Daniel Xu, Fengwei Battersby, Cara Ho, Paul T. P. Kruijssen, J. M. Diederik Petkova, Maya Sormani, Mattia C. Tress, Robin G. Wallace, Jennifer Armijos-Abendaño, J. Armillotta, Lucia Bijas, N. Buddhacharya, Rojita Busch, Laura A. Butterfield, Natalie O. Chevance, Mélanie Crowe, Samuel Díaz-Rodríguez, Ana Karla Dutkowska, Katarzyna M. Fedriani, Rubén Federrath, Christoph Glover, Simon C. O. Gu, Qi-Lao Houghton, Rebecca J. Hu, Yue Issac, Namitha Karoly, Janik Krumholz, Mark R. Liang, Fu-Heng Martín, Sergio Mazoochi, Farideh Pan, Xing Paré, Dylan Pillai, Thushara G. S. Riquelme-Vásquez, Denise Schmiedeke, Anika Sofue, Yoshiaki Tolls, Volker Williams, Gwenllian M. Zhang, Suinan Moravec, Emily Romero, Charles E. Mason, Brian S. Orlowski-Scherer, John Hatchfield, H Perry |
| author_facet | Ginsburg, Adam Walker, Daniel L. Barnes, Ashley T. Lu, Xing Sánchez-Monge, Álvaro Pineda, Jaime E. Pound, Marc W. Hsieh, Pei-Ying Immer, Katharina Zhang, Qizhou Budaiev, Nazar Gramze, Savannah R. Jeff, Desmond Cook, Claire Bulatek, Alyssa Mills, Elisabeth A. C. Bally, John Colzi, Laura García, Pablo Henshaw, Jonathan D. Jiménez-Serra, Izaskun Klessen, Ralf S. Dicker, Simon R. Longmore, Steven N. Nogueras-Lara, Francisco Rivilla, Víctor M. Santa-Maria, Miriam G. Wang, Q. Daniel Xu, Fengwei Battersby, Cara Ho, Paul T. P. Kruijssen, J. M. Diederik Petkova, Maya Sormani, Mattia C. Tress, Robin G. Wallace, Jennifer Armijos-Abendaño, J. Armillotta, Lucia Bijas, N. Buddhacharya, Rojita Busch, Laura A. Butterfield, Natalie O. Chevance, Mélanie Crowe, Samuel Díaz-Rodríguez, Ana Karla Dutkowska, Katarzyna M. Fedriani, Rubén Federrath, Christoph Glover, Simon C. O. Gu, Qi-Lao Houghton, Rebecca J. Hu, Yue Issac, Namitha Karoly, Janik Krumholz, Mark R. Liang, Fu-Heng Martín, Sergio Mazoochi, Farideh Pan, Xing Paré, Dylan Pillai, Thushara G. S. Riquelme-Vásquez, Denise Schmiedeke, Anika Sofue, Yoshiaki Tolls, Volker Williams, Gwenllian M. Zhang, Suinan Moravec, Emily Romero, Charles E. Mason, Brian S. Orlowski-Scherer, John Hatchfield, H Perry |
| contents | The ALMA Central Molecular Zone Exploration Survey, ACES, has mapped $\gtrsim1000$ square arcminutes at 3 mm toward the center of our Galaxy. ACES provides the first large-scale, high-resolution ($\sim2.5$") view of the central $\sim200$ parsecs of the Milky Way. In this work, we describe the continuum data processing and present the continuum data products. In the combined mosaic of 45 individual ALMA mosaics, the typical RMS noise achieved is $\sim0.1$ mJy per $\sim2.5$" beam, though there is a tail of substantially higher noise toward regions with bright continuum structure, especially around Sgr A* and Sgr B2. In-band spectral indices are measurable for a small fraction of the brightest and most compact sources, enabling distinction between dust-dominated and free-free- or synchrotron-dominated sources. To recover emission on large angular scales, we present the GBT MUSTANG-2 Three millimeter Extended Nucleus Survey (TENS), a new 10"resolution survey of the CMZ, which we combine with the ACES image by feathering. To demonstrate the quality and reliability of the ACES data, we compare to previously-published ALMA data obtained with higher resolution and sensitivity, finding overall good agreement with past results, but some disagreement toward the brightest sources. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_20240 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | ALMA Central Molecular Zone Exploration Survey (ACES) II: 3mm continuum images Ginsburg, Adam Walker, Daniel L. Barnes, Ashley T. Lu, Xing Sánchez-Monge, Álvaro Pineda, Jaime E. Pound, Marc W. Hsieh, Pei-Ying Immer, Katharina Zhang, Qizhou Budaiev, Nazar Gramze, Savannah R. Jeff, Desmond Cook, Claire Bulatek, Alyssa Mills, Elisabeth A. C. Bally, John Colzi, Laura García, Pablo Henshaw, Jonathan D. Jiménez-Serra, Izaskun Klessen, Ralf S. Dicker, Simon R. Longmore, Steven N. Nogueras-Lara, Francisco Rivilla, Víctor M. Santa-Maria, Miriam G. Wang, Q. Daniel Xu, Fengwei Battersby, Cara Ho, Paul T. P. Kruijssen, J. M. Diederik Petkova, Maya Sormani, Mattia C. Tress, Robin G. Wallace, Jennifer Armijos-Abendaño, J. Armillotta, Lucia Bijas, N. Buddhacharya, Rojita Busch, Laura A. Butterfield, Natalie O. Chevance, Mélanie Crowe, Samuel Díaz-Rodríguez, Ana Karla Dutkowska, Katarzyna M. Fedriani, Rubén Federrath, Christoph Glover, Simon C. O. Gu, Qi-Lao Houghton, Rebecca J. Hu, Yue Issac, Namitha Karoly, Janik Krumholz, Mark R. Liang, Fu-Heng Martín, Sergio Mazoochi, Farideh Pan, Xing Paré, Dylan Pillai, Thushara G. S. Riquelme-Vásquez, Denise Schmiedeke, Anika Sofue, Yoshiaki Tolls, Volker Williams, Gwenllian M. Zhang, Suinan Moravec, Emily Romero, Charles E. Mason, Brian S. Orlowski-Scherer, John Hatchfield, H Perry Astrophysics of Galaxies The ALMA Central Molecular Zone Exploration Survey, ACES, has mapped $\gtrsim1000$ square arcminutes at 3 mm toward the center of our Galaxy. ACES provides the first large-scale, high-resolution ($\sim2.5$") view of the central $\sim200$ parsecs of the Milky Way. In this work, we describe the continuum data processing and present the continuum data products. In the combined mosaic of 45 individual ALMA mosaics, the typical RMS noise achieved is $\sim0.1$ mJy per $\sim2.5$" beam, though there is a tail of substantially higher noise toward regions with bright continuum structure, especially around Sgr A* and Sgr B2. In-band spectral indices are measurable for a small fraction of the brightest and most compact sources, enabling distinction between dust-dominated and free-free- or synchrotron-dominated sources. To recover emission on large angular scales, we present the GBT MUSTANG-2 Three millimeter Extended Nucleus Survey (TENS), a new 10"resolution survey of the CMZ, which we combine with the ACES image by feathering. To demonstrate the quality and reliability of the ACES data, we compare to previously-published ALMA data obtained with higher resolution and sensitivity, finding overall good agreement with past results, but some disagreement toward the brightest sources. |
| title | ALMA Central Molecular Zone Exploration Survey (ACES) II: 3mm continuum images |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2602.20240 |