Show simple item record

Files in this item


Item metadata

dc.contributor.authorZhao, Lily L.
dc.contributor.authorFischer, Debra A.
dc.contributor.authorFord, Eric B.
dc.contributor.authorWise, Alex
dc.contributor.authorCretignier, Michaël
dc.contributor.authorAigrain, Suzanne
dc.contributor.authorBarragan, Oscar
dc.contributor.authorBedell, Megan
dc.contributor.authorBuchhave, Lars A.
dc.contributor.authorCamacho, João D.
dc.contributor.authorCegla, Heather M.
dc.contributor.authorCisewski-Kehe, Jessi
dc.contributor.authorCollier Cameron, Andrew
dc.contributor.authorde Beurs, Zoe L.
dc.contributor.authorDodson-Robinson, Sally
dc.contributor.authorDumusque, Xavier
dc.contributor.authorFaria, João P.
dc.contributor.authorGilbertson, Christian
dc.contributor.authorHaley, Charlotte
dc.contributor.authorHarrell, Justin
dc.contributor.authorHogg, David W.
dc.contributor.authorHolzer, Parker
dc.contributor.authorJohn, Ancy Anna
dc.contributor.authorKlein, Baptiste
dc.contributor.authorLafarga, Marina
dc.contributor.authorLienhard, Florian
dc.contributor.authorMaguire-Rajpaul, Vinesh
dc.contributor.authorMortier, Annelies
dc.contributor.authorNicholson, Belinda
dc.contributor.authorPalumbo, Michael L.
dc.contributor.authorRamirez Delgado, Victor
dc.contributor.authorShallue, Christopher J.
dc.contributor.authorVanderburg, Andrew
dc.contributor.authorViana, Pedro T. P.
dc.contributor.authorZhao, Jinglin
dc.contributor.authorZicher, Norbert
dc.contributor.authorCabot, Samuel H. C.
dc.contributor.authorHenry, Gregory W.
dc.contributor.authorRoettenbacher, Rachael M.
dc.contributor.authorBrewer, John M.
dc.contributor.authorLlama, Joe
dc.contributor.authorPetersburg, Ryan R.
dc.contributor.authorSzymkowiak, Andrew E.
dc.identifier.citationZhao , L L , Fischer , D A , Ford , E B , Wise , A , Cretignier , M , Aigrain , S , Barragan , O , Bedell , M , Buchhave , L A , Camacho , J D , Cegla , H M , Cisewski-Kehe , J , Collier Cameron , A , de Beurs , Z L , Dodson-Robinson , S , Dumusque , X , Faria , J P , Gilbertson , C , Haley , C , Harrell , J , Hogg , D W , Holzer , P , John , A A , Klein , B , Lafarga , M , Lienhard , F , Maguire-Rajpaul , V , Mortier , A , Nicholson , B , Palumbo , M L , Ramirez Delgado , V , Shallue , C J , Vanderburg , A , Viana , P T P , Zhao , J , Zicher , N , Cabot , S H C , Henry , G W , Roettenbacher , R M , Brewer , J M , Llama , J , Petersburg , R R & Szymkowiak , A E 2022 , ' The EXPRES Stellar Signals Project II. State of the field in disentangling photospheric velocities ' , Astronomical Journal , vol. 163 , no. 4 , 171 .
dc.identifier.otherPURE: 278392500
dc.identifier.otherPURE UUID: c1988e59-e2c0-47a4-bdc0-48a4c1362803
dc.identifier.otherJisc: 163667
dc.identifier.otherpublisher-id: ajac5176
dc.identifier.othermanuscript: ac5176
dc.identifier.otherother: aas35667
dc.identifier.otherORCID: /0000-0002-8863-7828/work/110423112
dc.identifier.otherORCID: /0000-0002-1715-6939/work/110423428
dc.identifier.otherScopus: 85126677843
dc.identifier.otherWOS: 000769131300001
dc.descriptionFunding: A.C.C. acknowledges support from the Science and Technology Facilities Council (STFC) consolidated grant number ST/R000824/1 and UKSA grant ST/R003203/1.en
dc.description.abstractMeasured spectral shifts due to intrinsic stellar variability (e.g., pulsations, granulation) and activity (e.g., spots, plages) are the largest source of error for extreme-precision radial-velocity (EPRV) exoplanet detection. Several methods are designed to disentangle stellar signals from true center-of-mass shifts due to planets. The Extreme-precision Spectrograph (EXPRES) Stellar Signals Project (ESSP) presents a self-consistent comparison of 22 different methods tested on the same extreme-precision spectroscopic data from EXPRES. Methods derived new activity indicators, constructed models for mapping an indicator to the needed radial-velocity (RV) correction, or separated out shape- and shift-driven RV components. Since no ground truth is known when using real data, relative method performance is assessed using the total and nightly scatter of returned RVs and agreement between the results of different methods. Nearly all submitted methods return a lower RV rms than classic linear decorrelation, but no method is yet consistently reducing the RV rms to sub-meter-per-second levels. There is a concerning lack of agreement between the RVs returned by different methods. These results suggest that continued progress in this field necessitates increased interpretability of methods, high-cadence data to capture stellar signals at all timescales, and continued tests like the ESSP using consistent data sets with more advanced metrics for method performance. Future comparisons should make use of various well-characterized data sets—such as solar data or data with known injected planetary and/or stellar signals—to better understand method performance and whether planetary signals are preserved.
dc.relation.ispartofAstronomical Journalen
dc.rightsCopyright © 2022. The Author(s). Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleThe EXPRES Stellar Signals Project II. State of the field in disentangling photospheric velocitiesen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record