Gemini Planet Imager Observations of a Resolved Low-Inclination Debris Disk Around HD 156623
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917730823700480 |
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| author | Lewis, Briley L. Fitzgerald, Michael P. Esposito, Thomas M. Arriaga, Pauline Lopez, Ronald Crotts, Katie A. Duchene, Gaspard Follette, Katherine B. Hom, Justin Kalas, Paul Matthews, Brenda C. Millar-Blanchaer, Maxwell Wilner, David J. Mazoyer, Johan Macintosh, Bruce |
| author_facet | Lewis, Briley L. Fitzgerald, Michael P. Esposito, Thomas M. Arriaga, Pauline Lopez, Ronald Crotts, Katie A. Duchene, Gaspard Follette, Katherine B. Hom, Justin Kalas, Paul Matthews, Brenda C. Millar-Blanchaer, Maxwell Wilner, David J. Mazoyer, Johan Macintosh, Bruce |
| contents | The 16 Myr-old A0V star HD 156623 in the Scorpius--Centaurus association hosts a high-fractional-luminosity debris disk, recently resolved in scattered light for the first time by the Gemini Planet Imager (GPI) in polarized intensity. We present new analysis of the GPI H-band polarimetric detection of the HD 156623 debris disk, with particular interest in its unique morphology. This debris disk lacks a visible inner clearing, unlike the majority of low-inclination disks in the GPI sample and in Sco-Cen, and it is known to contain CO gas, positioning it as a candidate ``hybrid'' or ``shielded'' disk. We use radiative transfer models to constrain the geometric parameters of the disk based on scattered light data and thermal models to constrain the unresolved inner radius based on the system's spectral energy distribution (SED). We also compute a measurement of the polarized scattering phase function, adding to the existing sample of empirical phase function measurements. We find that HD 156623's debris disk inner radius is constrained to less than 26.6 AU from scattered light imagery and less than 13.4 AU from SED modeling at a 99.7% confidence interval, and suggest that gas drag may play a role in retaining sub-blowout size dust grains so close to the star. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15986 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gemini Planet Imager Observations of a Resolved Low-Inclination Debris Disk Around HD 156623 Lewis, Briley L. Fitzgerald, Michael P. Esposito, Thomas M. Arriaga, Pauline Lopez, Ronald Crotts, Katie A. Duchene, Gaspard Follette, Katherine B. Hom, Justin Kalas, Paul Matthews, Brenda C. Millar-Blanchaer, Maxwell Wilner, David J. Mazoyer, Johan Macintosh, Bruce Earth and Planetary Astrophysics The 16 Myr-old A0V star HD 156623 in the Scorpius--Centaurus association hosts a high-fractional-luminosity debris disk, recently resolved in scattered light for the first time by the Gemini Planet Imager (GPI) in polarized intensity. We present new analysis of the GPI H-band polarimetric detection of the HD 156623 debris disk, with particular interest in its unique morphology. This debris disk lacks a visible inner clearing, unlike the majority of low-inclination disks in the GPI sample and in Sco-Cen, and it is known to contain CO gas, positioning it as a candidate ``hybrid'' or ``shielded'' disk. We use radiative transfer models to constrain the geometric parameters of the disk based on scattered light data and thermal models to constrain the unresolved inner radius based on the system's spectral energy distribution (SED). We also compute a measurement of the polarized scattering phase function, adding to the existing sample of empirical phase function measurements. We find that HD 156623's debris disk inner radius is constrained to less than 26.6 AU from scattered light imagery and less than 13.4 AU from SED modeling at a 99.7% confidence interval, and suggest that gas drag may play a role in retaining sub-blowout size dust grains so close to the star. |
| title | Gemini Planet Imager Observations of a Resolved Low-Inclination Debris Disk Around HD 156623 |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2407.15986 |