Bases vigotskianas da Atividade Orientadora  de Ensino

Piotto, Débora Cristina

doi:10.14393/obv4n2.a2020-57485

Cited by 2 publications

(2 citation statements)

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“…Chemical abundance studies of individual clusters starting many decades ago began to demonstrate light element abundance inhomogeneities among red giant, horizontal branch, and even main-sequence (MS) stars (e.g., Popper 1947;Harding 1962;Cohen 1978) and modern studies have continued to reveal star-to-star abundance variations in an ever-growing number of GCs (see, e.g., references in the reviews by Gratton et al 2012;Bastian & Lardo 2018;Gratton et al 2019). Recent large-scale photometric studies have revealed color broadening and even splits in the giant branches and MSs of clusters, particularly when blue or ultraviolet (UV) filters are utilized (Piotto 2008;Lardo et al 2011;Monelli et al 2013;Lee 2015;Piotto et al 2015;Milone et al 2017;Bonatto et al 2019;Hartmann et al 2022). These color spreads are well correlated with the light element spreads found in spectroscopic studies (Marino et al 2008;Carretta et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Blanco DECam Bulge Survey (BDBS). VII. Multiple Populations in Globular Clusters of the Galactic Bulge

Kader

Pilachowski

Johnson

et al. 2022

ApJ

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We present photometric evidence for multiple stellar populations (MPs) in 14 globular clusters (GCs) toward the southern Galactic bulge. The photometric data come as part of the Blanco DECam Bulge Survey, which is a deep, wide-field near-UV-near-IR (ugrizY) survey of the southern Galactic bulge. Here, we present the first systematic study of bulge GC multiple populations with deep photometry including the u band, which is a crucial indicator of the abundance of CNO-bearing molecules in stellar atmospheres. We identify cluster members using Gaia EDR3 proper motion measurements, and then isolate red giant branch stars using r versus u − r color–magnitude diagrams. We find evidence suggesting all 14 clusters host at least two populations, and NGC 6441, NGC 6626, and NGC 6656 appear to have at least three populations. Many of these clusters are not part of the Hubble Space Telescope (HST) surveys nor do they have comprehensive spectroscopic analyses so we are presenting the first evidence of MPs in several clusters. Not only do we find a strong anticorrelation between the fraction of first-generation stars and cluster absolute V magnitude, but the correlation coefficient and cluster-to-cluster scatter are similar to the results obtained from HST. Our ground-based data extend to much larger radial distances than similar HST observations, enabling a reliable estimate of the global fraction of first-generation stars in each cluster. This study demonstrates that ground-based u-band photometry as provided by DECam will prove powerful in the study of multiple populations in resolved GCs.

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Section: Introductionmentioning

confidence: 99%

Blanco DECam Bulge Survey (BDBS). VII. Multiple Populations in Globular Clusters of the Galactic Bulge

Kader

Pilachowski

Johnson

et al. 2022

ApJ

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“…É importante que ele leve diferentes formas de produções artísticas, mesmo que em fotografias ou vídeos, "possibilitando o enriquecimento do conhecimento estético" (ROSSI, 2003, p. 104). Na THC o professor é figura central na organização da atividade de ensino, de forma a mobilizar os estudantes para a apropriação dos conceitos por meio de uma atividade geradora de necessidade, pois foi ela, essa necessidade, que moveu o ser humano no seu processo histórico e agora permitirá aos alunos se apropriarem de tais conceitos e os modificarem (PIOTTO, 2020).…”

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Educação estética na infância: contribuições da atividade orientadora de ensino

Prado¹

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Agradeço aos meus pais, Janilda e Servandir, que me educaram, me apoiaram e me incentivaram durante toda a minha vida.Ao meu esposo, Michel, que caminha comigo há anos e sempre me incentivou a continuar estudando e me realizando profissionalmente.À minha orientadora e amiga, Profª Drª Elaine Sampaio Araujo, pela competência, respeito e amizade com que conduziu este processo, do alvorecer da ideia até a sua síntese, contribuindo para meu crescimento profissional, acadêmico e pessoal.

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Bases vigotskianas da Atividade Orientadora de Ensino

Cited by 2 publications

References 3 publications

Blanco DECam Bulge Survey (BDBS). VII. Multiple Populations in Globular Clusters of the Galactic Bulge

Blanco DECam Bulge Survey (BDBS). VII. Multiple Populations in Globular Clusters of the Galactic Bulge

Educação estética na infância: contribuições da atividade orientadora de ensino

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