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The NEID Earth Twin Survey. IV. Confirming an 89 days, ﹩m\,\sin \,i=10\,{M}_{\oplus }﹩ Planet Orbiting a Nearby Sun-like Star

  • Authors: Mark R. Giovinazzi, Evan Fitzmaurice, Arvind F. Gupta, Paul Robertson, Suvrath Mahadevan, Eric B. Ford, Jaime A. Alvarado-Montes, Chad F. Bender, Cullen H. Blake, Jiayin Dong, Rachel B. Fernandes, Samuel Halverson, Te Han, Shubham Kanodia, Daniel M. Krolikowski, Sarah E. Logsdon, Joe P. Ninan, Arpita Roy, Christian Schwab, Gudmundur Stefansson, Ryan C. Terrien, Jason T. Wright

Mark R. Giovinazzi et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 4.

Top: time series of NEID Ca II H and K values. Bottom: Lomb–Scargle periodogram for the same dataset. The horizontal dashed line marks the 0.1% false alarm probability (FAP) level, computed using astropy’s Lomb–Scargle routine following the approach outlined in R. V. Baluev (2008). We identify no strong periods at or near the signal reported for HD 190360 d.

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