Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2

Andrew A. Cole, Jeremy R. Mould, John S. Gallagher, John T. Clarke, John T. Trauger, Gilda E. Ballester, Christopher J. Burrows, Stefano Casertano, David Crisp, Richard Griffiths, J. Jeff Hester, John G. Hoessel, Jon A. Holtzman, Paul Scowen, Karl R. Stapelfeldt, James A. Westphal

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We have imaged the ∼2.2 billion-year-old Large Magellanic Cloud populous cluster NGC 1978 in the far-ultraviolet and visible with the second Wide Field/Planetary Camera (WFPC2) on the Hubble Space Telescope. The far-ultraviolet images show a sparse stellar field with little apparent density enhancement in the cluster core. The visible images are dominated by the cluster's first-ascent and second-ascent red giants, which are completely invisible to the far-ultraviolet filter. No evidence for a hot horizontal branch population of core-helium-burning stars is seen; nor is there any apparent indication of a significant blue straggler population. These results suggest that the presence of a rich, young population of field stars in the NGC 1978 region is responsible for the unusual location of the cluster in the integrated light color-color plots produced by IUE.

Original languageEnglish (US)
Pages (from-to)1945-1950
Number of pages6
JournalAstronomical Journal
Volume114
Issue number5
DOIs
StatePublished - Jan 1 1997

Fingerprint

Magellanic clouds
young population
star distribution
ascent
helium
ultraviolet filters
filter
color
IUE
Hubble Space Telescope
indication
plots
cameras
stars
augmentation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Cole, A. A., Mould, J. R., Gallagher, J. S., Clarke, J. T., Trauger, J. T., Ballester, G. E., ... Westphal, J. A. (1997). Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2. Astronomical Journal, 114(5), 1945-1950. https://doi.org/10.1086/118616

Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2. / Cole, Andrew A.; Mould, Jeremy R.; Gallagher, John S.; Clarke, John T.; Trauger, John T.; Ballester, Gilda E.; Burrows, Christopher J.; Casertano, Stefano; Crisp, David; Griffiths, Richard; Hester, J. Jeff; Hoessel, John G.; Holtzman, Jon A.; Scowen, Paul; Stapelfeldt, Karl R.; Westphal, James A.

In: Astronomical Journal, Vol. 114, No. 5, 01.01.1997, p. 1945-1950.

Research output: Contribution to journalArticle

Cole, AA, Mould, JR, Gallagher, JS, Clarke, JT, Trauger, JT, Ballester, GE, Burrows, CJ, Casertano, S, Crisp, D, Griffiths, R, Hester, JJ, Hoessel, JG, Holtzman, JA, Scowen, P, Stapelfeldt, KR & Westphal, JA 1997, 'Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2', Astronomical Journal, vol. 114, no. 5, pp. 1945-1950. https://doi.org/10.1086/118616
Cole AA, Mould JR, Gallagher JS, Clarke JT, Trauger JT, Ballester GE et al. Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2. Astronomical Journal. 1997 Jan 1;114(5):1945-1950. https://doi.org/10.1086/118616
Cole, Andrew A. ; Mould, Jeremy R. ; Gallagher, John S. ; Clarke, John T. ; Trauger, John T. ; Ballester, Gilda E. ; Burrows, Christopher J. ; Casertano, Stefano ; Crisp, David ; Griffiths, Richard ; Hester, J. Jeff ; Hoessel, John G. ; Holtzman, Jon A. ; Scowen, Paul ; Stapelfeldt, Karl R. ; Westphal, James A. / Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2. In: Astronomical Journal. 1997 ; Vol. 114, No. 5. pp. 1945-1950.
@article{cb8ee420ada04f919b06204602df206f,
title = "Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2",
abstract = "We have imaged the ∼2.2 billion-year-old Large Magellanic Cloud populous cluster NGC 1978 in the far-ultraviolet and visible with the second Wide Field/Planetary Camera (WFPC2) on the Hubble Space Telescope. The far-ultraviolet images show a sparse stellar field with little apparent density enhancement in the cluster core. The visible images are dominated by the cluster's first-ascent and second-ascent red giants, which are completely invisible to the far-ultraviolet filter. No evidence for a hot horizontal branch population of core-helium-burning stars is seen; nor is there any apparent indication of a significant blue straggler population. These results suggest that the presence of a rich, young population of field stars in the NGC 1978 region is responsible for the unusual location of the cluster in the integrated light color-color plots produced by IUE.",
author = "Cole, {Andrew A.} and Mould, {Jeremy R.} and Gallagher, {John S.} and Clarke, {John T.} and Trauger, {John T.} and Ballester, {Gilda E.} and Burrows, {Christopher J.} and Stefano Casertano and David Crisp and Richard Griffiths and Hester, {J. Jeff} and Hoessel, {John G.} and Holtzman, {Jon A.} and Paul Scowen and Stapelfeldt, {Karl R.} and Westphal, {James A.}",
year = "1997",
month = "1",
day = "1",
doi = "10.1086/118616",
language = "English (US)",
volume = "114",
pages = "1945--1950",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "5",

}

TY - JOUR

T1 - Far-ultraviolet imaging of the large magellanic cloud populous cluster NGC 1978 with WFPC2

AU - Cole, Andrew A.

AU - Mould, Jeremy R.

AU - Gallagher, John S.

AU - Clarke, John T.

AU - Trauger, John T.

AU - Ballester, Gilda E.

AU - Burrows, Christopher J.

AU - Casertano, Stefano

AU - Crisp, David

AU - Griffiths, Richard

AU - Hester, J. Jeff

AU - Hoessel, John G.

AU - Holtzman, Jon A.

AU - Scowen, Paul

AU - Stapelfeldt, Karl R.

AU - Westphal, James A.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - We have imaged the ∼2.2 billion-year-old Large Magellanic Cloud populous cluster NGC 1978 in the far-ultraviolet and visible with the second Wide Field/Planetary Camera (WFPC2) on the Hubble Space Telescope. The far-ultraviolet images show a sparse stellar field with little apparent density enhancement in the cluster core. The visible images are dominated by the cluster's first-ascent and second-ascent red giants, which are completely invisible to the far-ultraviolet filter. No evidence for a hot horizontal branch population of core-helium-burning stars is seen; nor is there any apparent indication of a significant blue straggler population. These results suggest that the presence of a rich, young population of field stars in the NGC 1978 region is responsible for the unusual location of the cluster in the integrated light color-color plots produced by IUE.

AB - We have imaged the ∼2.2 billion-year-old Large Magellanic Cloud populous cluster NGC 1978 in the far-ultraviolet and visible with the second Wide Field/Planetary Camera (WFPC2) on the Hubble Space Telescope. The far-ultraviolet images show a sparse stellar field with little apparent density enhancement in the cluster core. The visible images are dominated by the cluster's first-ascent and second-ascent red giants, which are completely invisible to the far-ultraviolet filter. No evidence for a hot horizontal branch population of core-helium-burning stars is seen; nor is there any apparent indication of a significant blue straggler population. These results suggest that the presence of a rich, young population of field stars in the NGC 1978 region is responsible for the unusual location of the cluster in the integrated light color-color plots produced by IUE.

UR - http://www.scopus.com/inward/record.url?scp=0000871474&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000871474&partnerID=8YFLogxK

U2 - 10.1086/118616

DO - 10.1086/118616

M3 - Article

AN - SCOPUS:0000871474

VL - 114

SP - 1945

EP - 1950

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 5

ER -