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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.01884 |
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| _version_ | 1866929533037314048 |
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| author | Danieli, Shany Kado-Fong, Erin Huang, Song Luo, Yifei Li, Ting S Kelvin, Lee S Leauthaud, Alexie Greene, Jenny E. Mintz, Abby Lin, Xiaojing Li, Jiaxuan Baldassare, Vivienne Banerjee, Arka Bhattacharyya, Joy Blanco, Diana Brooks, Alyson Cai, Zheng Chen, Xinjun Cruz, Akaxia Geda, Robel Guan, Runquan Johnson, Sean Kannawadi, Arun Kim, Stacy Y. Li, Mingyu Lupton, Robert Mace, Charlie Medina, Gustavo E. Pan, Yue Peter, Annika H. G. Read, Justin I. Rosado, Rodrigo Córdova Seifert, Allen Wasleske, Erik J. Wick, Joseph |
| author_facet | Danieli, Shany Kado-Fong, Erin Huang, Song Luo, Yifei Li, Ting S Kelvin, Lee S Leauthaud, Alexie Greene, Jenny E. Mintz, Abby Lin, Xiaojing Li, Jiaxuan Baldassare, Vivienne Banerjee, Arka Bhattacharyya, Joy Blanco, Diana Brooks, Alyson Cai, Zheng Chen, Xinjun Cruz, Akaxia Geda, Robel Guan, Runquan Johnson, Sean Kannawadi, Arun Kim, Stacy Y. Li, Mingyu Lupton, Robert Mace, Charlie Medina, Gustavo E. Pan, Yue Peter, Annika H. G. Read, Justin I. Rosado, Rodrigo Córdova Seifert, Allen Wasleske, Erik J. Wick, Joseph |
| contents | We present the Merian Survey, an optical imaging survey optimized for studying the physical properties of bright star-forming dwarf galaxies. Merian is carried out with two medium-band filters ($N708$ and $N540$, centered at $708$ and $540$ nm), custom-built for the Dark Energy Camera (DECam) on the Blanco telescope. Merian covers $\sim 750\,\mathrm{deg}^2$ of equatorial fields, overlapping with the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) wide, deep, and ultra-deep fields. When combined with the HSC-SSP imaging data ($grizy$), the new Merian DECam medium-band imaging allows for photometric redshift measurements via the detection of H$\rmα$ and [OIII] line emission flux excess in the $N708$ and $N540$ filters, respectively, at $0.06<z<0.10$. We present an overview of the survey design, observations taken to date, data reduction using the LSST Science Pipelines, including aperture-matched photometry for accurate galaxy colors, and a description of the data included in the first data release (DR1). The key science goals of Merian include: probing the dark matter halos of dwarf galaxies out to their virial radii using high signal-to-noise weak lensing profile measurements, decoupling the effects of baryonic processes from dark matter, and understanding the role of black holes in dwarf galaxy evolution. This rich dataset will also offer unique opportunities for studying extremely metal-poor galaxies via their strong [OIII] emission and H$\rmα$ lines, as well as [OIII] emitters at $z\sim 0.4$, and Ly$\rmα$ emitters at $z\sim 3.3$ and $z\sim 4.8$. Merian showcases the power of utilizing narrow and medium-band filters alongside broad-band filters for sky imaging, demonstrating their synergistic capacity to unveil astrophysical insights across diverse astrophysical phenomena. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_01884 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Merian: A Wide-Field Imaging Survey of Dwarf Galaxies at z~0.06-0.10 Danieli, Shany Kado-Fong, Erin Huang, Song Luo, Yifei Li, Ting S Kelvin, Lee S Leauthaud, Alexie Greene, Jenny E. Mintz, Abby Lin, Xiaojing Li, Jiaxuan Baldassare, Vivienne Banerjee, Arka Bhattacharyya, Joy Blanco, Diana Brooks, Alyson Cai, Zheng Chen, Xinjun Cruz, Akaxia Geda, Robel Guan, Runquan Johnson, Sean Kannawadi, Arun Kim, Stacy Y. Li, Mingyu Lupton, Robert Mace, Charlie Medina, Gustavo E. Pan, Yue Peter, Annika H. G. Read, Justin I. Rosado, Rodrigo Córdova Seifert, Allen Wasleske, Erik J. Wick, Joseph Astrophysics of Galaxies We present the Merian Survey, an optical imaging survey optimized for studying the physical properties of bright star-forming dwarf galaxies. Merian is carried out with two medium-band filters ($N708$ and $N540$, centered at $708$ and $540$ nm), custom-built for the Dark Energy Camera (DECam) on the Blanco telescope. Merian covers $\sim 750\,\mathrm{deg}^2$ of equatorial fields, overlapping with the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) wide, deep, and ultra-deep fields. When combined with the HSC-SSP imaging data ($grizy$), the new Merian DECam medium-band imaging allows for photometric redshift measurements via the detection of H$\rmα$ and [OIII] line emission flux excess in the $N708$ and $N540$ filters, respectively, at $0.06<z<0.10$. We present an overview of the survey design, observations taken to date, data reduction using the LSST Science Pipelines, including aperture-matched photometry for accurate galaxy colors, and a description of the data included in the first data release (DR1). The key science goals of Merian include: probing the dark matter halos of dwarf galaxies out to their virial radii using high signal-to-noise weak lensing profile measurements, decoupling the effects of baryonic processes from dark matter, and understanding the role of black holes in dwarf galaxy evolution. This rich dataset will also offer unique opportunities for studying extremely metal-poor galaxies via their strong [OIII] emission and H$\rmα$ lines, as well as [OIII] emitters at $z\sim 0.4$, and Ly$\rmα$ emitters at $z\sim 3.3$ and $z\sim 4.8$. Merian showcases the power of utilizing narrow and medium-band filters alongside broad-band filters for sky imaging, demonstrating their synergistic capacity to unveil astrophysical insights across diverse astrophysical phenomena. |
| title | Merian: A Wide-Field Imaging Survey of Dwarf Galaxies at z~0.06-0.10 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2410.01884 |