The age of the Sculptor dwarf spheroidal galaxy from imaging with WFPC2

Jackie Monkiewicz; Jeremy R. Mould; John S. Gallagher; John T. Clarke; John T. Trauger; Carl Grillmair; Gilda E. Ballester; Christopher J. Burrows; David Crisp; Robin Evans; Richard Griffiths; J. Jeff Hester; John G. Hoessel; Jon A. Holtzman; John E. Krist; Vicki Meadows; Paul Scowen; Karl R. Stapelfeldt; Ragvendra Sahai; Alan Watson

doi:10.1086/316447

The age of the Sculptor dwarf spheroidal galaxy from imaging with WFPC2

Jackie Monkiewicz, Jeremy R. Mould, John S. Gallagher, John T. Clarke, John T. Trauger, Carl Grillmair, Gilda E. Ballester, Christopher J. Burrows, David Crisp, Robin Evans, Richard Griffiths, J. Jeff Hester, John G. Hoessel, Jon A. Holtzman, John E. Krist, Vicki Meadows, Paul Scowen, Karl R. Stapelfeldt, Ragvendra Sahai, Alan Watson

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

45 Scopus citations

Abstract

From images taken with the hubble Space Telescope's WFPC2, we have obtained photometry of a field in the Sculptor dwarf spheroidal galaxy to 3 mag below the main-sequence turnoff. We determine an age equal to that of the earliest globular clusters for the bulk of the stars in our field of view. We attempt to constrain the star formation history of the Sculptor dwarf by examining the main-sequence luminosity function. The presence of a half-dozen blue straggler candidates blueward of the turnoff points to a possibly complex star formation history. However, the contribution of any intermediate-age population is difficult to measure conclusively, because of the uncertain origin of blue stragglers and the sparseness of the photometric sample.

Original language	English (US)
Pages (from-to)	1392-1397
Number of pages	6
Journal	Publications of the Astronomical Society of the Pacific
Volume	111
Issue number	765
DOIs	https://doi.org/10.1086/316447
State	Published - Nov 1999

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/316447

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Monkiewicz, J., Mould, J. R., Gallagher, J. S., Clarke, J. T., Trauger, J. T., Grillmair, C., Ballester, G. E., Burrows, C. J., Crisp, D., Evans, R., Griffiths, R., Hester, J. J., Hoessel, J. G., Holtzman, J. A., Krist, J. E., Meadows, V., Scowen, P., Stapelfeldt, K. R., Sahai, R., & Watson, A. (1999). The age of the Sculptor dwarf spheroidal galaxy from imaging with WFPC2. Publications of the Astronomical Society of the Pacific, 111(765), 1392-1397. https://doi.org/10.1086/316447

Monkiewicz, J, Mould, JR, Gallagher, JS, Clarke, JT, Trauger, JT, Grillmair, C, Ballester, GE, Burrows, CJ, Crisp, D, Evans, R, Griffiths, R, Hester, JJ, Hoessel, JG, Holtzman, JA, Krist, JE, Meadows, V, Scowen, P, Stapelfeldt, KR, Sahai, R & Watson, A 1999, 'The age of the Sculptor dwarf spheroidal galaxy from imaging with WFPC2', Publications of the Astronomical Society of the Pacific, vol. 111, no. 765, pp. 1392-1397. https://doi.org/10.1086/316447

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title = "The age of the Sculptor dwarf spheroidal galaxy from imaging with WFPC2",

abstract = "From images taken with the hubble Space Telescope's WFPC2, we have obtained photometry of a field in the Sculptor dwarf spheroidal galaxy to 3 mag below the main-sequence turnoff. We determine an age equal to that of the earliest globular clusters for the bulk of the stars in our field of view. We attempt to constrain the star formation history of the Sculptor dwarf by examining the main-sequence luminosity function. The presence of a half-dozen blue straggler candidates blueward of the turnoff points to a possibly complex star formation history. However, the contribution of any intermediate-age population is difficult to measure conclusively, because of the uncertain origin of blue stragglers and the sparseness of the photometric sample.",

author = "Jackie Monkiewicz and Mould, {Jeremy R.} and Gallagher, {John S.} and Clarke, {John T.} and Trauger, {John T.} and Carl Grillmair and Ballester, {Gilda E.} and Burrows, {Christopher J.} and David Crisp and Robin Evans and Richard Griffiths and Hester, {J. Jeff} and Hoessel, {John G.} and Holtzman, {Jon A.} and Krist, {John E.} and Vicki Meadows and Paul Scowen and Stapelfeldt, {Karl R.} and Ragvendra Sahai and Alan Watson",

year = "1999",

month = nov,

doi = "10.1086/316447",

language = "English (US)",

volume = "111",

pages = "1392--1397",

journal = "Publications of the Astronomical Society of the Pacific",

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AU - Monkiewicz, Jackie

AU - Mould, Jeremy R.

AU - Gallagher, John S.

AU - Clarke, John T.

AU - Trauger, John T.

AU - Grillmair, Carl

AU - Ballester, Gilda E.

AU - Burrows, Christopher J.

AU - Crisp, David

AU - Evans, Robin

AU - Griffiths, Richard

AU - Hester, J. Jeff

AU - Hoessel, John G.

AU - Holtzman, Jon A.

AU - Krist, John E.

AU - Meadows, Vicki

AU - Scowen, Paul

AU - Stapelfeldt, Karl R.

AU - Sahai, Ragvendra

AU - Watson, Alan

PY - 1999/11

Y1 - 1999/11

N2 - From images taken with the hubble Space Telescope's WFPC2, we have obtained photometry of a field in the Sculptor dwarf spheroidal galaxy to 3 mag below the main-sequence turnoff. We determine an age equal to that of the earliest globular clusters for the bulk of the stars in our field of view. We attempt to constrain the star formation history of the Sculptor dwarf by examining the main-sequence luminosity function. The presence of a half-dozen blue straggler candidates blueward of the turnoff points to a possibly complex star formation history. However, the contribution of any intermediate-age population is difficult to measure conclusively, because of the uncertain origin of blue stragglers and the sparseness of the photometric sample.

AB - From images taken with the hubble Space Telescope's WFPC2, we have obtained photometry of a field in the Sculptor dwarf spheroidal galaxy to 3 mag below the main-sequence turnoff. We determine an age equal to that of the earliest globular clusters for the bulk of the stars in our field of view. We attempt to constrain the star formation history of the Sculptor dwarf by examining the main-sequence luminosity function. The presence of a half-dozen blue straggler candidates blueward of the turnoff points to a possibly complex star formation history. However, the contribution of any intermediate-age population is difficult to measure conclusively, because of the uncertain origin of blue stragglers and the sparseness of the photometric sample.

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JF - Publications of the Astronomical Society of the Pacific

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ER -

The age of the Sculptor dwarf spheroidal galaxy from imaging with WFPC2

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