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Colección SciELO Chile

A High-precision Trigonometric Parallax to an Ancient Metal-poor Globular Cluster

Indexado

WoS	WOS:000427978700001
Scopus	SCOPUS_ID:85044765384

DOI

10.3847/2041-8213/AAB55A

Año

2018

Tipo

artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras

Abstract

Using the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST), we have obtained a direct trigonometric parallax for the nearest metal-poor globular cluster, NGC 6397. Although trigonometric parallaxes have been previously measured for many nearby open clusters, this is the first parallax for an ancient metal-poor population-one that is used as a fundamental template in many stellar population studies. This high-precision measurement was enabled by the HST/WFC3 spatial-scanning mode, providing hundreds of astrometric measurements for dozens of stars in the cluster and also for Galactic field stars along the same sightline. We find a parallax of 0.418 +/- 0.013 +/- 0.018 mas (statistical, systematic), corresponding to a true distance modulus of 11.89 +/- 0.07 +/- 0.09 mag (2.39 +/- 0.07 +/- 0.10 kpc). The V luminosity at the stellar main-sequence turnoff implies an absolute cluster age of 13.4 +/- 0.7 +/- 1.2 Gyr.

Revista

Revista	ISSN
Astrophysical #Journal Letters	2041-8205

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Disciplinas de Investigación

WOS
Astronomy & Astrophysics

Scopus
Sin Disciplinas

SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional

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Autores - Afiliación

Ord.	Autor	Género	Institución - País
1	Brown, Thomas M.	Hombre	Space Telescope Sci Inst - Estados Unidos STScI - Estados Unidos Space Telescope Science Institute - Estados Unidos
2	Sen, Anjan A.	Hombre	Space Telescope Sci Inst - Estados Unidos STScI - Estados Unidos Space Telescope Science Institute - Estados Unidos
3	Strader, J.	-	Michigan State Univ - Estados Unidos Michigan State University - Estados Unidos
4	Riess, A. G.	Hombre	Space Telescope Sci Inst - Estados Unidos Johns Hopkins Univ - Estados Unidos STScI - Estados Unidos Johns Hopkins University - Estados Unidos Space Telescope Science Institute - Estados Unidos
5	VandenBerg, Don A.	Hombre	Univ Victoria - Canadá University of Victoria - Canadá
6	Soderblom, David R.	Hombre	Space Telescope Sci Inst - Estados Unidos STScI - Estados Unidos Space Telescope Science Institute - Estados Unidos
7	Kalirai, Jason	Hombre	Space Telescope Sci Inst - Estados Unidos Johns Hopkins Univ - Estados Unidos STScI - Estados Unidos Johns Hopkins University - Estados Unidos Space Telescope Science Institute - Estados Unidos
8	SALINAS-VENEGAS, RICARDO CRISTIAN	Hombre	Observatorio Gemini - Chile Gemini ObservatorySouthern Operations Center - Chile

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Origen de Citas Identificadas

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Citas identificadas: Las citas provienen de documentos incluidos en la base de datos de DATACIENCIA

Citas Identificadas: 4.17 %
Citas No-identificadas: 95.83 %

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Citas identificadas: Las citas provienen de documentos incluidos en la base de datos de DATACIENCIA

Citas Identificadas: 4.17 %
Citas No-identificadas: 95.83 %

Financiamiento

Fuente
NASA
National Aeronautics and Space Administration
Space Telescope Science Institute
Packard Fellowship
NASA through a grant from the Space Telescope Science Institute (STScI)
STScI under U.S. Government

Muestra la fuente de financiamiento declarada en la publicación.

Agradecimientos

Agradecimiento
Support for programs GO-13817, GO-14336, and GO-14773 was provided by NASA through a grant from the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Based on observations obtained at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministerio da Ciencia, Tecnologia, Inovacaos e Comunicacaoes (MCTIC) do Brasil, the U.S. National Optical Astronomy Observatory (NOAO), the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU). J.S. was supported by a Packard Fellowship. We are grateful to B. Anthony-Twarog for providing the full catalogs of her Stromgren photometry. The Digitized Sky Surveys were produced at STScI under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The Second Epoch Survey of the southern sky was made by the Anglo-Australian Observatory with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the STScI. The digitized images are copyright 1993-2000 by the Anglo-Australian Observatory Board, and are distributed herein by agreement.
Support for programs GO-13817, GO-14336, and GO-14773 was provided by NASA through a grant from the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Based on observations obtained at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministério da Ciência, Tecnologia, Inovaçãos e Comunicaçãoes (MCTIC) do Brasil, the U.S. National Optical Astronomy Observatory (NOAO), the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU). J.S. was supported by a Packard Fellowship. We are grateful to B. Anthony-Twarog for providing the full catalogs of her Strömgren photometry. The Digitized Sky Surveys were produced at STScI under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The Second Epoch Survey of the southern sky was made by the Anglo-Australian Observatory with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the STScI. The digitized images are copyright 1993-2000 by the Anglo-Australian Observatory Board, and are distributed herein by agreement.

Agradecimiento

Support for programs GO-13817, GO-14336, and GO-14773 was provided by NASA through a grant from the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Based on observations obtained at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministerio da Ciencia, Tecnologia, Inovacaos e Comunicacaoes (MCTIC) do Brasil, the U.S. National Optical Astronomy Observatory (NOAO), the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU). J.S. was supported by a Packard Fellowship. We are grateful to B. Anthony-Twarog for providing the full catalogs of her Stromgren photometry. The Digitized Sky Surveys were produced at STScI under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The Second Epoch Survey of the southern sky was made by the Anglo-Australian Observatory with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the STScI. The digitized images are copyright 1993-2000 by the Anglo-Australian Observatory Board, and are distributed herein by agreement.

Support for programs GO-13817, GO-14336, and GO-14773 was provided by NASA through a grant from the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Based on observations obtained at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministério da Ciência, Tecnologia, Inovaçãos e Comunicaçãoes (MCTIC) do Brasil, the U.S. National Optical Astronomy Observatory (NOAO), the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU). J.S. was supported by a Packard Fellowship. We are grateful to B. Anthony-Twarog for providing the full catalogs of her Strömgren photometry. The Digitized Sky Surveys were produced at STScI under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The Second Epoch Survey of the southern sky was made by the Anglo-Australian Observatory with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the STScI. The digitized images are copyright 1993-2000 by the Anglo-Australian Observatory Board, and are distributed herein by agreement.

Muestra la fuente de financiamiento declarada en la publicación.

Abstract

Revista

Métricas Externas

Disciplinas de Investigación

Colaboración Institucional

Autores - Afiliación

Origen de Citas Identificadas

Financiamiento

Agradecimientos

Departamento Gestión de Conocimiento, Monitoreo y Prospección