Searching for new solar twins: The Inti survey for the Northern Sky

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dc.contributor.authorYana Galarza J.
dc.contributor.authorLopez-Valdivia R.
dc.contributor.authorLorenzo-Oliveira D.
dc.contributor.authorReggiani H.
dc.contributor.authorMelendez J.
dc.contributor.authorGamarra-Sanchez D.
dc.contributor.authorFlores M.
dc.contributor.authorPortal-Rivera J.
dc.contributor.authorMiquelarena P.
dc.contributor.authorPonte G.
dc.contributor.authorSchlaufman K.C.
dc.contributor.authorVargas Auccalla T.
dc.date.accessioned2024-03-12T19:20:18Z
dc.date.available2024-03-12T19:20:18Z
dc.date.issued2021
dc.description.abstract© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.Solar twins are key in different areas of astrophysics, however only just over a hundred were identified and well-studied in the last two decades. In this work, we take advantage of the very precise Gaia (DR2/EDR3), Tycho, and 2MASS photometric systems to create the Inti survey of new solar twins in the Northern Hemisphere. The spectra of our targets were initially obtained with spectrographs of moderate resolution (ARCES and Goodman spectrographs with R = 31 500 and 11 930, respectively) to find the best solar twin candidates and then observed at McDonald Observatory with higher resolving power (TS23, R = 60 000) and signal-to-noise ratio (SNR ~300-500). The stellar parameters were estimated through the differential spectroscopic equilibrium relative to the Sun, which allow us to achieve a high internal precision (σ(Teff) = 15 K, σ(log g) = 0.03 dex, σ([Fe/H]) = 0.01 dex, and σ(vt) = 0.03 km s-1). We propose a new class of stars with evolution similar to the Sun: solar proxy, which is useful to perform studies related to the evolution of the Sun, such as its rotational and magnetic evolution. Its definition is based on metallicity (-0.15 dex ≤ [Fe/H] ≤ + 0.15 dex) and mass (0.95 M⊙ ≤ M ≤ 1.05 M⊙) constraints, thus assuring that the star follows a similar evolutionary path as the Sun along the main sequence. Based on this new definition, we report 70 newly identified solar proxies, 46 solar analogues, and 13 solar-type stars. In addition, we identified nine close solar twins whose stellar parameters are the most similar to those of the Sun.
dc.description.firstpage1873
dc.description.issuenumber2
dc.description.lastpage1887
dc.description.volume504
dc.identifier.doi10.1093/mnras/stab987
dc.identifier.issn1365-2966
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34648
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsAcesso Restrito
dc.subject.otherlanguageStars: abundances
dc.subject.otherlanguageStars: activity
dc.subject.otherlanguageStars: atmospheres
dc.subject.otherlanguageStars: fundamental parameters
dc.subject.otherlanguageStars: solar-type
dc.subject.otherlanguageTechniques: spectroscopic
dc.titleSearching for new solar twins: The Inti survey for the Northern Sky
dc.typeArtigo
local.scopus.citations11
local.scopus.eid2-s2.0-85107823241
local.scopus.subjectNorthern Hemispheres
local.scopus.subjectPhotometric systems
local.scopus.subjectSpectra's
local.scopus.subjectStar: activity
local.scopus.subjectStars abundances
local.scopus.subjectStars: atmosphere
local.scopus.subjectStars: solar types
local.scopus.subjectStars:fundamental parameters
local.scopus.subjectStellar parameters
local.scopus.subjectTechniques: spectroscopic
local.scopus.updated2024-12-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85107823241&origin=inward
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