High-S/N Quasar Observations with HST/COS: Deep Fields for Spectroscopy
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arXiv
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| Formato: | Preprint |
| Publicado: |
2026
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| author | Fox, Andrew J. Kriss, Jerry Richter, Philipp Shull, J. Michael Cashman, Frances Mishra, Sapna Anderson, Annelia Arav, Nahum Augustin, Ramona Barger, Kathleen Berg, Michelle Bordoloi, Rongmon Borthakur, Sanchayeeta Burchett, Joseph Charlton, Jane Chen, Hsiao-Wen Churchill, Christopher Cooke, Ryan de Cia, Annalisa de Rosa, Gisella Davé, Romeel Faerman, Yakov Fischer, Travis French, David Hasan, Farhan Hernandez, Svea Hummels, Cameron Johnson, Sean Kacprzak, Glenn Khaire, Vikram Kim, Doyeon Avery Koplitz, Brad Kulkarni, Varsha Lehner, Nicolas Mingozzi, Matilde Monroe, Talawanda Muzahid, Sowgat Oppenheimer, Benjamin Peeples, Molly Péroux, Céline Petitjean, Patrick Petric, Andreea Pettini, Max Qu, Zhijie Rowlands, Kate Sankrit, Ravi Som, Debopam Srianand, Raghunathan Tejos, Nicolas Tumlinson, Jason Wakker, Bart Werk, Jessica |
| author_facet | Fox, Andrew J. Kriss, Jerry Richter, Philipp Shull, J. Michael Cashman, Frances Mishra, Sapna Anderson, Annelia Arav, Nahum Augustin, Ramona Barger, Kathleen Berg, Michelle Bordoloi, Rongmon Borthakur, Sanchayeeta Burchett, Joseph Charlton, Jane Chen, Hsiao-Wen Churchill, Christopher Cooke, Ryan de Cia, Annalisa de Rosa, Gisella Davé, Romeel Faerman, Yakov Fischer, Travis French, David Hasan, Farhan Hernandez, Svea Hummels, Cameron Johnson, Sean Kacprzak, Glenn Khaire, Vikram Kim, Doyeon Avery Koplitz, Brad Kulkarni, Varsha Lehner, Nicolas Mingozzi, Matilde Monroe, Talawanda Muzahid, Sowgat Oppenheimer, Benjamin Peeples, Molly Péroux, Céline Petitjean, Patrick Petric, Andreea Pettini, Max Qu, Zhijie Rowlands, Kate Sankrit, Ravi Som, Debopam Srianand, Raghunathan Tejos, Nicolas Tumlinson, Jason Wakker, Bart Werk, Jessica |
| contents | Hubble is still in prime observing condition for making transformative discoveries in UV astronomy. In this white paper we describe the science case for a deep (S/N>30) UV spectroscopic survey with HST/COS targeting approximately 20 QSOs at 0.5<z<1.5 at good resolution (20 km/s). This survey would capitalize on our current UV capability, produce a legacy dataset enabling community science in many areas of galactic and extragalactic research, and pioneer a path for future UV science with the Habitable Worlds Observatory. Such high-S/N spectra are largely missing from the MAST archives, and would be analogous to the deep Hubble imaging fields (HDF, UDF, Frontier Fields) that have been enormously successful and far-reaching in their science impact. This legacy dataset would enable frontier science programs in several areas, including (1) studies of the CGM and IGM at unparalleled sensitivity, covering a wide range of UV metal lines and reaching very low H I column densities of log N=12.6 and low metallicities near [Z/H]=-2, enabling precision studies of the chemical abundances, ionization, temperature, and baryon and metal budgets of the CGM and IGM; (2) diffuse gas in the Milky Way and Local Group, including high-velocity clouds and gas streams from satellite mergers; (3) AGN outflows, which would be probed in the rest-frame extreme ultraviolet (EUV), covering continuum-generation mechanisms and diagnostics of gas in accretion-disk outflows. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_29949 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-S/N Quasar Observations with HST/COS: Deep Fields for Spectroscopy Fox, Andrew J. Kriss, Jerry Richter, Philipp Shull, J. Michael Cashman, Frances Mishra, Sapna Anderson, Annelia Arav, Nahum Augustin, Ramona Barger, Kathleen Berg, Michelle Bordoloi, Rongmon Borthakur, Sanchayeeta Burchett, Joseph Charlton, Jane Chen, Hsiao-Wen Churchill, Christopher Cooke, Ryan de Cia, Annalisa de Rosa, Gisella Davé, Romeel Faerman, Yakov Fischer, Travis French, David Hasan, Farhan Hernandez, Svea Hummels, Cameron Johnson, Sean Kacprzak, Glenn Khaire, Vikram Kim, Doyeon Avery Koplitz, Brad Kulkarni, Varsha Lehner, Nicolas Mingozzi, Matilde Monroe, Talawanda Muzahid, Sowgat Oppenheimer, Benjamin Peeples, Molly Péroux, Céline Petitjean, Patrick Petric, Andreea Pettini, Max Qu, Zhijie Rowlands, Kate Sankrit, Ravi Som, Debopam Srianand, Raghunathan Tejos, Nicolas Tumlinson, Jason Wakker, Bart Werk, Jessica Astrophysics of Galaxies Hubble is still in prime observing condition for making transformative discoveries in UV astronomy. In this white paper we describe the science case for a deep (S/N>30) UV spectroscopic survey with HST/COS targeting approximately 20 QSOs at 0.5<z<1.5 at good resolution (20 km/s). This survey would capitalize on our current UV capability, produce a legacy dataset enabling community science in many areas of galactic and extragalactic research, and pioneer a path for future UV science with the Habitable Worlds Observatory. Such high-S/N spectra are largely missing from the MAST archives, and would be analogous to the deep Hubble imaging fields (HDF, UDF, Frontier Fields) that have been enormously successful and far-reaching in their science impact. This legacy dataset would enable frontier science programs in several areas, including (1) studies of the CGM and IGM at unparalleled sensitivity, covering a wide range of UV metal lines and reaching very low H I column densities of log N=12.6 and low metallicities near [Z/H]=-2, enabling precision studies of the chemical abundances, ionization, temperature, and baryon and metal budgets of the CGM and IGM; (2) diffuse gas in the Milky Way and Local Group, including high-velocity clouds and gas streams from satellite mergers; (3) AGN outflows, which would be probed in the rest-frame extreme ultraviolet (EUV), covering continuum-generation mechanisms and diagnostics of gas in accretion-disk outflows. |
| title | High-S/N Quasar Observations with HST/COS: Deep Fields for Spectroscopy |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2605.29949 |