Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17
© 2019. The American Astronomical Society. All rights reserved. We present revised stellar properties for 172 K2 target stars that were identified as possible hosts of transiting planets during Campaigns 1-17. Using medium-resolution near-infrared spectra acquired with the NASA Infrared Telescope Fa...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Astronomical Society
2021
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| Online Access: | https://hdl.handle.net/1721.1/132396 |
| _version_ | 1826188062933123072 |
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| author | Dressing, Courtney D Hardegree-Ullman, Kevin Schlieder, Joshua E Newton, Elisabeth R Vanderburg, Andrew Feinstein, Adina D Duvvuri, Girish M Arnold, Lauren Bristow, Makennah Thackeray, Beverly Abrahams, Ellianna Schwab Ciardi, David R Crossfield, Ian JM Yu, Liang Martinez, Arturo O Christiansen, Jessie L Crepp, Justin R Isaacson, Howard |
| author_facet | Dressing, Courtney D Hardegree-Ullman, Kevin Schlieder, Joshua E Newton, Elisabeth R Vanderburg, Andrew Feinstein, Adina D Duvvuri, Girish M Arnold, Lauren Bristow, Makennah Thackeray, Beverly Abrahams, Ellianna Schwab Ciardi, David R Crossfield, Ian JM Yu, Liang Martinez, Arturo O Christiansen, Jessie L Crepp, Justin R Isaacson, Howard |
| author_sort | Dressing, Courtney D |
| collection | MIT |
| description | © 2019. The American Astronomical Society. All rights reserved. We present revised stellar properties for 172 K2 target stars that were identified as possible hosts of transiting planets during Campaigns 1-17. Using medium-resolution near-infrared spectra acquired with the NASA Infrared Telescope Facility/SpeX and Palomar/TripleSpec, we found that 86 of our targets were bona fide cool dwarfs, 74 were hotter dwarfs, and 12 were giants. Combining our spectroscopic metallicities with Gaia parallaxes and archival photometry, we derived photometric stellar parameters and compared them to our spectroscopic estimates. Although our spectroscopic and photometric radius and temperature estimates are consistent, our photometric mass estimates are systematically ΔM ∗ = 0.11 M o (34%) higher than our spectroscopic mass estimates for the least massive stars (M ∗,phot < 0.4 M o). Adopting the photometric parameters and comparing our results to parameters reported in the Ecliptic Plane Input Catalog, our revised stellar radii are ΔR ∗ = 0.15 R o (40%) larger, and our revised stellar effective temperatures are roughly ΔT eff = 65 K cooler. Correctly determining the properties of K2 target stars is essential for characterizing any associated planet candidates, estimating the planet search sensitivity, and calculating planet occurrence rates. Even though Gaia parallaxes have increased the power of photometric surveys, spectroscopic characterization remains essential for determining stellar metallicities and investigating correlations between stellar metallicity and planetary properties. |
| first_indexed | 2024-09-23T07:54:01Z |
| format | Article |
| id | mit-1721.1/132396 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T07:54:01Z |
| publishDate | 2021 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1323962021-09-21T04:10:08Z Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17 Dressing, Courtney D Hardegree-Ullman, Kevin Schlieder, Joshua E Newton, Elisabeth R Vanderburg, Andrew Feinstein, Adina D Duvvuri, Girish M Arnold, Lauren Bristow, Makennah Thackeray, Beverly Abrahams, Ellianna Schwab Ciardi, David R Crossfield, Ian JM Yu, Liang Martinez, Arturo O Christiansen, Jessie L Crepp, Justin R Isaacson, Howard © 2019. The American Astronomical Society. All rights reserved. We present revised stellar properties for 172 K2 target stars that were identified as possible hosts of transiting planets during Campaigns 1-17. Using medium-resolution near-infrared spectra acquired with the NASA Infrared Telescope Facility/SpeX and Palomar/TripleSpec, we found that 86 of our targets were bona fide cool dwarfs, 74 were hotter dwarfs, and 12 were giants. Combining our spectroscopic metallicities with Gaia parallaxes and archival photometry, we derived photometric stellar parameters and compared them to our spectroscopic estimates. Although our spectroscopic and photometric radius and temperature estimates are consistent, our photometric mass estimates are systematically ΔM ∗ = 0.11 M o (34%) higher than our spectroscopic mass estimates for the least massive stars (M ∗,phot < 0.4 M o). Adopting the photometric parameters and comparing our results to parameters reported in the Ecliptic Plane Input Catalog, our revised stellar radii are ΔR ∗ = 0.15 R o (40%) larger, and our revised stellar effective temperatures are roughly ΔT eff = 65 K cooler. Correctly determining the properties of K2 target stars is essential for characterizing any associated planet candidates, estimating the planet search sensitivity, and calculating planet occurrence rates. Even though Gaia parallaxes have increased the power of photometric surveys, spectroscopic characterization remains essential for determining stellar metallicities and investigating correlations between stellar metallicity and planetary properties. 2021-09-20T18:22:12Z 2021-09-20T18:22:12Z 2020-10-19T16:07:51Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132396 en 10.3847/1538-3881/AB2895 Astronomical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Astronomical Society The American Astronomical Society |
| spellingShingle | Dressing, Courtney D Hardegree-Ullman, Kevin Schlieder, Joshua E Newton, Elisabeth R Vanderburg, Andrew Feinstein, Adina D Duvvuri, Girish M Arnold, Lauren Bristow, Makennah Thackeray, Beverly Abrahams, Ellianna Schwab Ciardi, David R Crossfield, Ian JM Yu, Liang Martinez, Arturo O Christiansen, Jessie L Crepp, Justin R Isaacson, Howard Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17 |
| title | Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17 |
| title_full | Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17 |
| title_fullStr | Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17 |
| title_full_unstemmed | Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17 |
| title_short | Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. IV. Updated Properties for 86 Cool Dwarfs Observed during Campaigns 1–17 |
| title_sort | characterizing k2 candidate planetary systems orbiting low mass stars iv updated properties for 86 cool dwarfs observed during campaigns 1 17 |
| url | https://hdl.handle.net/1721.1/132396 |
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