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Reinvestigation of the Multiepoch Direct Detections of HD 88133 b and Upsilon Andromedae b

Buzard, Cam and Piskorz, Danielle and Lockwood, Alexandra C. and Blake, Geoffrey and Barman, Travis S. and Benneke, Björn and Bender, Chad F. and Carr, John S. (2021) Reinvestigation of the Multiepoch Direct Detections of HD 88133 b and Upsilon Andromedae b. Astronomical Journal, 162 (6). Art. No. 269. ISSN 0004-6256. doi:10.3847/1538-3881/ac2a2c.

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We reanalyze the multiepoch direct detections of HD 88133 b and ups And b that were published in Piskorz et al. (2016) and Piskorz et al. (2017), respectively. Using simulations to attempt to reproduce the detections, we find that with the six and seven L-band Keck/NIRSPEC epochs analyzed in the original works, the planets would not have been detectable unless they had unreasonably large radii. HD88133 and ups And both have fairly large stellar radii, which contributed to the difficulty in detecting the planets. We take this opportunity to consider how these planets may have been detectable with the small number of epochs originally presented by running simulations both with the upgraded NIRSPEC instrument and with near-zero primary velocities, as recommended by Buzard et al. (2021). While seven L-band NIRSPEC2.0 epochs with near-zero primary velocities would have allowed a strong (10.8σ) detection of ups And b, many more than six L-band epochs would have been required for a strong detection of HD88133b, which could be due in part to both this system's large stellar radius and low stellar temperature. This work stresses the importance of careful analytic procedures and the usefulness of simulations in understanding the expected sensitivity of high-resolution spectroscopic data.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Buzard, Cam0000-0002-9943-6124
Piskorz, Danielle0000-0003-4451-2342
Blake, Geoffrey0000-0003-0787-1610
Barman, Travis S.0000-0002-7129-3002
Benneke, Björn0000-0001-5578-1498
Bender, Chad F.0000-0003-4384-7220
Carr, John S.0000-0002-6695-3977
Additional Information:© 2021. The Author(s). Published by the American Astronomical Society. Received 2021 July 19; revised 2021 September 9; accepted 2021 September 24; published 2021 November 29. We want to acknowledge Katie Kaufman's contribution to the ups And NIRSPEC data reduction along with support from NASA XRP grant NNX16AI14G. We thank our anonymous reviewer for their kind and close reading of our manuscript.
Funding AgencyGrant Number
Subject Keywords:High resolution spectroscopy; Radial velocity; Exoplanets
Issue or Number:6
Classification Code:Unified Astronomy Thesaurus concepts: High resolution spectroscopy (2096); Radial velocity (1332); Exoplanets (498)
Record Number:CaltechAUTHORS:20211203-204702918
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Official Citation:Cam Buzard et al 2021 AJ 162 269
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112215
Deposited By: George Porter
Deposited On:03 Dec 2021 22:46
Last Modified:23 Feb 2022 22:34

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