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Trio of super-Earth candidates orbiting K-dwarf HD 48948 : a new habitable zone candidate
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dc.contributor.author | Dalal, S | |
dc.contributor.author | Rescigno, F | |
dc.contributor.author | Cretignier, M | |
dc.contributor.author | Anna John, A | |
dc.contributor.author | Majidi, F Z | |
dc.contributor.author | Malavolta, L | |
dc.contributor.author | Mortier, A | |
dc.contributor.author | Pinamonti, M | |
dc.contributor.author | Buchhave, L A | |
dc.contributor.author | Haywood, R D | |
dc.contributor.author | Sozzetti, A | |
dc.contributor.author | Dumusque, X | |
dc.contributor.author | Lienhard, F | |
dc.contributor.author | Rice, K | |
dc.contributor.author | Vanderburg, A | |
dc.contributor.author | Lakeland, B | |
dc.contributor.author | Bonomo, A S | |
dc.contributor.author | Cameron, A Collier | |
dc.contributor.author | Damasso, M | |
dc.contributor.author | Affer, L | |
dc.contributor.author | Boschin, W | |
dc.contributor.author | Cooke, B | |
dc.contributor.author | Cosentino, R | |
dc.contributor.author | Fabrizio, L Di | |
dc.contributor.author | Ghedina, A | |
dc.contributor.author | Harutyunyan, A | |
dc.contributor.author | Latham, D W | |
dc.contributor.author | López-Morales, M | |
dc.contributor.author | Lovis, C | |
dc.contributor.author | Fiorenzano, A F Martínez | |
dc.contributor.author | Mayor, M | |
dc.contributor.author | Nicholson, B | |
dc.contributor.author | Pepe, F | |
dc.contributor.author | Stalport, M | |
dc.contributor.author | Udry, S | |
dc.contributor.author | Watson, C A | |
dc.contributor.author | Wilson, T G | |
dc.date.accessioned | 2024-07-17T14:30:11Z | |
dc.date.available | 2024-07-17T14:30:11Z | |
dc.date.issued | 2024-07 | |
dc.identifier | 305294561 | |
dc.identifier | bf76df29-8379-4f35-8113-d01998b5dd7a | |
dc.identifier | 85197364796 | |
dc.identifier.citation | Dalal , S , Rescigno , F , Cretignier , M , Anna John , A , Majidi , F Z , Malavolta , L , Mortier , A , Pinamonti , M , Buchhave , L A , Haywood , R D , Sozzetti , A , Dumusque , X , Lienhard , F , Rice , K , Vanderburg , A , Lakeland , B , Bonomo , A S , Cameron , A C , Damasso , M , Affer , L , Boschin , W , Cooke , B , Cosentino , R , Fabrizio , L D , Ghedina , A , Harutyunyan , A , Latham , D W , López-Morales , M , Lovis , C , Fiorenzano , A F M , Mayor , M , Nicholson , B , Pepe , F , Stalport , M , Udry , S , Watson , C A & Wilson , T G 2024 , ' Trio of super-Earth candidates orbiting K-dwarf HD 48948 : a new habitable zone candidate ' , Monthly Notices of the Royal Astronomical Society , vol. 531 , no. 4 , stae1367 , pp. 4464-4481 . https://doi.org/10.1093/mnras/stae1367 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | RIS: urn:A8501DAC52746CA84A5F8379F48D0A4E | |
dc.identifier.other | ORCID: /0000-0002-1715-6939/work/163571281 | |
dc.identifier.other | RIS: urn:A8501DAC52746CA84A5F8379F48D0A4E | |
dc.identifier.uri | https://hdl.handle.net/10023/30204 | |
dc.description | Funding: SD acknowledges support from the STFC consolidated grant no. ST/V000721/1. FR is funded by the University of Exeter’s College of Engineering, Maths and Physical Sciences, UK. ACC acknowledges support from STFC consolidated grant numbers ST/R000824/1 and ST/V000861/1, and UKSA grant no. ST/R003203/1. KR is grateful for support from UK STFC via consolidated grant no. ST/V000594/1. RDH is funded by the UK Science and Technology Facilities Council (STFC)’s Ernest Rutherford Fellowship (grant number ST/V004735/1). MC acknowledges the SNSF support under grant P500PT 211024. AS, ASB, and MD gratefully acknowledge support from the ‘Programma di Ricerca Fondamentale INAF 2023’ of the National Institute of Astrophysics (Large Grant 2023 EXODEMO). MP acknowledges support from the Italian Space Agency (ASI) under contract 2018-24-HH.0 ‘The Italian participation to the Gaia Data Processing and Analysis Consortium (DPAC)’ in collaboration with the Italian National Institute of Astrophysics. MP also acknowledges support from the European Union – NextGenerationEU (PRIN MUR 2022 20229R43BH) and the ‘Programma di Ricerca Fondamentale INAF 2023’. FPE and CLO would like to acknowledge the Swiss National Science Foundation (SNSF) for supporting research with HARPS-N through the SNSF grant numbers 140649, 152721, 166227, 184618, and 215190. | en |
dc.description.abstract | We present the discovery of three super-Earth candidates orbiting HD 48948, a bright K-dwarf star with an apparent magnitude of mV = 8.58 mag. As part of the HARPS-N Rocky Planet Search programme, we collect 189 high-precision radial velocity measurements using the HARPS-N spectrograph from 2013 October 6, to 2023 April 16. Various methodologies are applied to extract the radial velocities from the spectra, and we conduct a comprehensive comparative analysis of the outcomes obtained through these diverse extraction techniques. To ensure the robustness of our findings, we employ several methods to address stellar variability, with a focus on Gaussian Process regression. To account for the impact of stellar variability and correlated noise in the radial velocity data set, we include activity indicators, such as logR′HK and bisector span, in the multidimensional Gaussian Process regression. Our analysis reveals three planetary candidates with orbital periods of 7.3, 38, and 151 d, and minimum masses estimated at 4.88±0.21 M ⊕ , 7.27±0.70 M ⊕ , and 10.59±1.00 M ⊕ , respectively. The outermost planet resides within the (temperate) habitable zone, positioned at a projected distance of 0.029arcsec from its star. Given the close proximity of this planetary system, situated at a distance of 16.8 parsecs, HD 48498 emerges as a promising target (closest super-Earth around FGK stars) for future high-contrast direct imaging and high-resolution spectroscopic studies. | |
dc.format.extent | 18 | |
dc.format.extent | 10992949 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | Techniques: radial velocities | en |
dc.subject | Planets and satellites: detection | en |
dc.subject | Stars: activity | en |
dc.subject | Methods: statistical | en |
dc.subject | Stars: rotation | en |
dc.subject | Instrumentation: spectrographs | en |
dc.subject | QB Astronomy | en |
dc.subject | DAS | en |
dc.subject.lcc | QB | en |
dc.title | Trio of super-Earth candidates orbiting K-dwarf HD 48948 : a new habitable zone candidate | en |
dc.type | Journal article | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.identifier.doi | 10.1093/mnras/stae1367 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://ui.adsabs.harvard.edu/abs/2024MNRAS.531.4464D/abstract | en |
dc.identifier.grantnumber | ST/R00824/1 | en |
dc.identifier.grantnumber | ST/V000861/1 | en |
dc.identifier.grantnumber | ST/R003203/1 | en |
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