The M4 Core Project with HST: I. Overview and first epoch

被引：15

作者：

Bedin, L. R. ^{[1
]}

Anderson, J. ^{[2
]}

Heggie, D. C. ^{[3
,4
]}

Piotto, G. ^{[1
,5
]}

Milone, A. P. ^{[6
,7
,8
]}

Giersz, M. ^{[9
]}

Nascimbeni, V. ^{[1
,5
]}

Bellini, A. ^{[2
]}

Rich, R. M. ^{[10
]}

van den Berg, M. ^{[11
,12
]}

Pooley, D. ^{[13
,14
]}

Brogaard, K. ^{[15
,16
]}

Ortolani, S. ^{[1
,5
]}

Malavolta, L. ^{[1
,5
]}

Ubeda, L. ^{[2
]}

Marino, A. F. ^{[8
]}

机构：

[1] Osserv Astron Padova, Ist Nazl Astrofis, I-35122 Padua, Italy

[2] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[3] Univ Edinburgh, Sch Math, Edinburgh EH9 3JZ, Midlothian, Scotland

[4] Univ Edinburgh, Maxwell Inst Math Sci, Edinburgh EH9 3JZ, Midlothian, Scotland

[5] Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-35122 Padua, Italy

[6] Inst Astrofis Canarias, E-38200 Tenerife, Canary Islands, Spain

[7] Univ La Laguna, Dept Astrophys, E-38200 Tenerife, Canary Islands, Spain

[8] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[9] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland

[10] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[11] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands

[12] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[13] Sam Houston State Univ, Dept Phys, Huntsville, TX 77341 USA

[14] Eureka Sci Inc, Oakland, CA 94602 USA

[15] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[16] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada

来源：

ASTRONOMISCHE NACHRICHTEN | 2013年 / 334卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

astrometry; globular clusters: individual (M4; NGC6121); stars: distances; stars: imaging; binaries: general; surveys; GLOBULAR-CLUSTER M4; MONTE-CARLO SIMULATIONS; X-RAY SOURCES; SPACE-TELESCOPE PHOTOMETRY; HORIZONTAL-BRANCH STARS; DOUBLE MAIN-SEQUENCE; NGC; 6397; ABUNDANCE VARIATIONS; GLOBULAR-CLUSTER-47; TUCANAE; STELLAR POPULATIONS;

D O I：

10.1002/asna.201311911

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an overview of the ongoing Hubble Space Telescope large program GO-12911. The program is focused on the core of M4, the nearest Galactic globular cluster, and the observations are designed to constrain the number of binaries with massive companions (black holes, neutron stars, or white dwarfs) by measuring the "wobble" of the luminous (main-sequence) companion around the center of mass of the pair, with an astrometric precision of similar to 50 mu as. The high spatial resolution and stable medium-band PSFs of WFC3/UVISwillmake these measurements possible. In this work we describe (i) the motivation behind this study, (ii) our observing strategy, (iii) the many other investigations enabled by this unique data set, and which of those our team is conducting, and (iv) a preliminary reduction of the first-epoch dataset collected on 2012 October 10. (C) 2013 WILEY-VCH Verlag GmbH& Co. KGaA, Weinheim

引用

页码：1062 / 1085

页数：24

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