Current laboratory performance of starlight suppression systems, and potential pathways to desired Habitable Worlds Observatory exoplanet science capabilities
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Mennesson, Bertrand Belikov, Ruslan Por, Emiel Serabyn, Eugene Ruane, Garreth Riggs, A. J. Eldorado Sirbu, Dan Pueyo, Laurent Soummer, Remi Kasdin, Jeremy Shaklan, Stuart Seo, Byoung-Joon Stark, Christopher Cady, Eric Chen, Pin Crill, Brendan Fogarty, Kevin Greenbaum, Alexandra Guyon, Olivier Juanola-Parramon, Roser Kern, Brian Krist, John Macintosh, Bruce Marx, David Mawet, Dimitri Prada, Camilo Mejia Morgan, Rhonda Nemati, Bijan Pogorelyuk, Leonid Redmond, Susan Seager, Sara Siegler, Nicholas Stapelfeldt, Karl Steiger, Sarah Trauger, John Ygouf, a James K. Wallace Marie Zimmerman, Neil |
| author_facet | Mennesson, Bertrand Belikov, Ruslan Por, Emiel Serabyn, Eugene Ruane, Garreth Riggs, A. J. Eldorado Sirbu, Dan Pueyo, Laurent Soummer, Remi Kasdin, Jeremy Shaklan, Stuart Seo, Byoung-Joon Stark, Christopher Cady, Eric Chen, Pin Crill, Brendan Fogarty, Kevin Greenbaum, Alexandra Guyon, Olivier Juanola-Parramon, Roser Kern, Brian Krist, John Macintosh, Bruce Marx, David Mawet, Dimitri Prada, Camilo Mejia Morgan, Rhonda Nemati, Bijan Pogorelyuk, Leonid Redmond, Susan Seager, Sara Siegler, Nicholas Stapelfeldt, Karl Steiger, Sarah Trauger, John Ygouf, a James K. Wallace Marie Zimmerman, Neil |
| contents | We summarize the current best polychromatic (10 to 20 % bandwidth) contrast performance demonstrated in the laboratory by different starlight suppression approaches and systems designed to directly characterize exoplanets around nearby stars. We present results obtained by internal coronagraph and external starshade experimental testbeds using entrance apertures equivalent to off-axis or on-axis telescopes, either monolithic or segmented. For a given angular separation and spectral bandwidth, the performance of each starlight suppression system is characterized by the values of raw contrast (before image processing), off-axis (exoplanet) core throughput, and post-calibration contrast (the final 1 sigma detection limit of off-axis point sources, after image processing). To place the current laboratory results in the perspective of the future Habitable Worlds Observatory (HWO) mission, we simulate visible observations of a fiducial Earth/Sun twin system at 12 pc, assuming a 6m (inscribed diameter) collecting aperture and a realistic end-to-end optical throughput. The exposure times required for broadband exoearth detection (20% bandwidth around a wavelength of 0.55 microns) and visible spectroscopic observations (R=70) are then computed assuming various levels of starlight suppression performance, including the values currently demonstrated in the laboratory. Using spectroscopic exposure time as a simple metric, our results point to key starlight suppression system design performance improvements and trades to be conducted in support of HWO exoplanet science capabilities. These trades may be explored via numerical studies, lab experiments, as well as high contrast space-based observations and demonstrations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_18036 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Current laboratory performance of starlight suppression systems, and potential pathways to desired Habitable Worlds Observatory exoplanet science capabilities Mennesson, Bertrand Belikov, Ruslan Por, Emiel Serabyn, Eugene Ruane, Garreth Riggs, A. J. Eldorado Sirbu, Dan Pueyo, Laurent Soummer, Remi Kasdin, Jeremy Shaklan, Stuart Seo, Byoung-Joon Stark, Christopher Cady, Eric Chen, Pin Crill, Brendan Fogarty, Kevin Greenbaum, Alexandra Guyon, Olivier Juanola-Parramon, Roser Kern, Brian Krist, John Macintosh, Bruce Marx, David Mawet, Dimitri Prada, Camilo Mejia Morgan, Rhonda Nemati, Bijan Pogorelyuk, Leonid Redmond, Susan Seager, Sara Siegler, Nicholas Stapelfeldt, Karl Steiger, Sarah Trauger, John Ygouf, a James K. Wallace Marie Zimmerman, Neil Instrumentation and Methods for Astrophysics We summarize the current best polychromatic (10 to 20 % bandwidth) contrast performance demonstrated in the laboratory by different starlight suppression approaches and systems designed to directly characterize exoplanets around nearby stars. We present results obtained by internal coronagraph and external starshade experimental testbeds using entrance apertures equivalent to off-axis or on-axis telescopes, either monolithic or segmented. For a given angular separation and spectral bandwidth, the performance of each starlight suppression system is characterized by the values of raw contrast (before image processing), off-axis (exoplanet) core throughput, and post-calibration contrast (the final 1 sigma detection limit of off-axis point sources, after image processing). To place the current laboratory results in the perspective of the future Habitable Worlds Observatory (HWO) mission, we simulate visible observations of a fiducial Earth/Sun twin system at 12 pc, assuming a 6m (inscribed diameter) collecting aperture and a realistic end-to-end optical throughput. The exposure times required for broadband exoearth detection (20% bandwidth around a wavelength of 0.55 microns) and visible spectroscopic observations (R=70) are then computed assuming various levels of starlight suppression performance, including the values currently demonstrated in the laboratory. Using spectroscopic exposure time as a simple metric, our results point to key starlight suppression system design performance improvements and trades to be conducted in support of HWO exoplanet science capabilities. These trades may be explored via numerical studies, lab experiments, as well as high contrast space-based observations and demonstrations. |
| title | Current laboratory performance of starlight suppression systems, and potential pathways to desired Habitable Worlds Observatory exoplanet science capabilities |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2404.18036 |