The M 4 Core Project with HST: I. Overview and first epoch

L. R. Bedin; J. Anderson; D. C. Heggie; G. Piotto; A. P. Milone; M. Giersz; V. Nascimbeni; A. Bellini; R. M. Rich; M. Van Den Berg; D. Pooley; K. Brogaard; S. Ortolani; L. Malavolta; L. Ubeda; A. F. Marino

doi:10.1002/asna.201311911

The M 4 Core Project with HST: I. Overview and first epoch

L. R. Bedin^*, J. Anderson, D. C. Heggie, G. Piotto, A. P. Milone, M. Giersz, V. Nascimbeni, A. Bellini, R. M. Rich, M. Van Den Berg, D. Pooley, K. Brogaard, S. Ortolani, L. Malavolta, L. Ubeda, A. F. Marino

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We present an overview of the ongoing Hubble Space Telescope large program GO-12911. The program is focused on the core of M 4, 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 (mainsequence) companion around the center of mass of the pair, with an astrometric precision of ∼50 μas. The high spatial resolution and stable medium-band PSFs of WFC3/UVIS will make 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.

Original language	English
Pages (from-to)	1062-1085
Number of pages	24
Journal	Astronomische Nachrichten
Volume	334
Issue number	10
DOIs	https://doi.org/10.1002/asna.201311911
Publication status	Published - Dec 2013

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Bedin, L. R., Anderson, J., Heggie, D. C., Piotto, G., Milone, A. P., Giersz, M., Nascimbeni, V., Bellini, A., Rich, R. M., Van Den Berg, M., Pooley, D., Brogaard, K., Ortolani, S., Malavolta, L., Ubeda, L., & Marino, A. F. (2013). The M 4 Core Project with HST: I. Overview and first epoch. Astronomische Nachrichten, 334(10), 1062-1085. https://doi.org/10.1002/asna.201311911

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abstract = "We present an overview of the ongoing Hubble Space Telescope large program GO-12911. The program is focused on the core of M 4, 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 (mainsequence) companion around the center of mass of the pair, with an astrometric precision of ∼50 μas. The high spatial resolution and stable medium-band PSFs of WFC3/UVIS will make 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.",

keywords = "Astrometry, Binaries: general, Globular clusters: individual (M4, NGC 6121), Stars: distances, Stars: imaging, Surveys",

author = "Bedin, {L. R.} and J. Anderson and Heggie, {D. C.} and G. Piotto and Milone, {A. P.} and M. Giersz and V. Nascimbeni and A. Bellini and Rich, {R. M.} and {Van Den Berg}, M. and D. Pooley and K. Brogaard and S. Ortolani and L. Malavolta and L. Ubeda and Marino, {A. F.}",

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AU - Milone, A. P.

AU - Giersz, M.

AU - Nascimbeni, V.

AU - Bellini, A.

AU - Rich, R. M.

AU - Van Den Berg, M.

AU - Pooley, D.

AU - Brogaard, K.

AU - Ortolani, S.

AU - Malavolta, L.

AU - Ubeda, L.

AU - Marino, A. F.

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KW - Globular clusters: individual (M4, NGC 6121)

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KW - Surveys

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The M 4 Core Project with HST: I. Overview and first epoch

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