Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b
We present precision transit observations of the Neptune-sized planets K2-28b and K2-100b, using the Engineered Diffuser on the ARCTIC imager on the ARC 3.5m Telescope at Apache Point Observatory. K2-28b is a $R_{p} = 2.56 R_\oplus$ mini-Neptune transiting a bright (J=11.7) metal-rich M4 dwarf, offe...
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ftdatacite:10.48550/arxiv.1807.04420 2023-05-15T15:01:52+02:00 Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b Stefansson, Gudmundur Li, Yiting Mahadevan, Suvrath Wisniewski, John Hebb, Leslie Morris, Brett Huehnerhoff, Joseph Hawley, Suzanne 2018 https://dx.doi.org/10.48550/arxiv.1807.04420 https://arxiv.org/abs/1807.04420 unknown arXiv https://dx.doi.org/10.3847/1538-3881/aae6ca arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Earth and Planetary Astrophysics astro-ph.EP Instrumentation and Methods for Astrophysics astro-ph.IM FOS Physical sciences article-journal Article ScholarlyArticle Text 2018 ftdatacite https://doi.org/10.48550/arxiv.1807.04420 https://doi.org/10.3847/1538-3881/aae6ca 2022-04-01T09:13:26Z We present precision transit observations of the Neptune-sized planets K2-28b and K2-100b, using the Engineered Diffuser on the ARCTIC imager on the ARC 3.5m Telescope at Apache Point Observatory. K2-28b is a $R_{p} = 2.56 R_\oplus$ mini-Neptune transiting a bright (J=11.7) metal-rich M4 dwarf, offering compelling prospects for future atmospheric characterization. K2-100b is a $R_{p} = 3.45 R_\oplus$ Neptune in the Praesepe Cluster and is one of few planets known in a cluster transiting a host star bright enough ($V=10.5$) for precision radial velocity observations. Using the precision photometric capabilities of the diffuser/ARCTIC system, allows us to achieve a precision of $105^{+87}_{-37}$ppm, and $38^{+21}_{-11}$ppm in 30 minute bins for K2-28b, and K2-100b, respectively. Our joint-fits to the K2 and ground-based light-curves give an order of magnitude improvement in the orbital ephemeris for both planets, yielding a timing precision of 2min in the JWST era. Although we show that the currently available broad-band measurements of K2-28b's radius are currently too imprecise to place useful constraints on K2-28b's atmosphere, we demonstrate that JWST/NIRISS will be able to discern between a cloudy/clear atmosphere in a modest number of transit observations. Our light-curve of K2-100b marks the first transit follow-up observation of this challenging-to-observe transit, where we obtain a transit depth of $819 \pm 50 \mathrm{ppm}$ in the SDSS $i^\prime$ band. We conclude that diffuser-assisted photometry can play an important role in the TESS era to perform timely and precise follow-up of the expected bounty of TESS planet candidates. : 14 pages, 4 figures, submitted to AAS journals Text Arctic DataCite Metadata Store (German National Library of Science and Technology) Arctic |
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Earth and Planetary Astrophysics astro-ph.EP Instrumentation and Methods for Astrophysics astro-ph.IM FOS Physical sciences |
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Earth and Planetary Astrophysics astro-ph.EP Instrumentation and Methods for Astrophysics astro-ph.IM FOS Physical sciences Stefansson, Gudmundur Li, Yiting Mahadevan, Suvrath Wisniewski, John Hebb, Leslie Morris, Brett Huehnerhoff, Joseph Hawley, Suzanne Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b |
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Earth and Planetary Astrophysics astro-ph.EP Instrumentation and Methods for Astrophysics astro-ph.IM FOS Physical sciences |
description |
We present precision transit observations of the Neptune-sized planets K2-28b and K2-100b, using the Engineered Diffuser on the ARCTIC imager on the ARC 3.5m Telescope at Apache Point Observatory. K2-28b is a $R_{p} = 2.56 R_\oplus$ mini-Neptune transiting a bright (J=11.7) metal-rich M4 dwarf, offering compelling prospects for future atmospheric characterization. K2-100b is a $R_{p} = 3.45 R_\oplus$ Neptune in the Praesepe Cluster and is one of few planets known in a cluster transiting a host star bright enough ($V=10.5$) for precision radial velocity observations. Using the precision photometric capabilities of the diffuser/ARCTIC system, allows us to achieve a precision of $105^{+87}_{-37}$ppm, and $38^{+21}_{-11}$ppm in 30 minute bins for K2-28b, and K2-100b, respectively. Our joint-fits to the K2 and ground-based light-curves give an order of magnitude improvement in the orbital ephemeris for both planets, yielding a timing precision of 2min in the JWST era. Although we show that the currently available broad-band measurements of K2-28b's radius are currently too imprecise to place useful constraints on K2-28b's atmosphere, we demonstrate that JWST/NIRISS will be able to discern between a cloudy/clear atmosphere in a modest number of transit observations. Our light-curve of K2-100b marks the first transit follow-up observation of this challenging-to-observe transit, where we obtain a transit depth of $819 \pm 50 \mathrm{ppm}$ in the SDSS $i^\prime$ band. We conclude that diffuser-assisted photometry can play an important role in the TESS era to perform timely and precise follow-up of the expected bounty of TESS planet candidates. : 14 pages, 4 figures, submitted to AAS journals |
format |
Text |
author |
Stefansson, Gudmundur Li, Yiting Mahadevan, Suvrath Wisniewski, John Hebb, Leslie Morris, Brett Huehnerhoff, Joseph Hawley, Suzanne |
author_facet |
Stefansson, Gudmundur Li, Yiting Mahadevan, Suvrath Wisniewski, John Hebb, Leslie Morris, Brett Huehnerhoff, Joseph Hawley, Suzanne |
author_sort |
Stefansson, Gudmundur |
title |
Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b |
title_short |
Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b |
title_full |
Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b |
title_fullStr |
Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b |
title_full_unstemmed |
Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b |
title_sort |
diffuser-assisted photometric follow-up observations of the neptune-sized planets k2-28b and k2-100b |
publisher |
arXiv |
publishDate |
2018 |
url |
https://dx.doi.org/10.48550/arxiv.1807.04420 https://arxiv.org/abs/1807.04420 |
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geographic_facet |
Arctic |
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op_relation |
https://dx.doi.org/10.3847/1538-3881/aae6ca |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1807.04420 https://doi.org/10.3847/1538-3881/aae6ca |
_version_ |
1766333872363012096 |