Progressive star formation in the young galactic super star cluster NGC 3603

Giacomo Beccari, Loredana Spezzi, Guido De Marchi, Francesco Paresce, Erick Young, Morten Andersen, Nino Panagia, Bruce Balick, Howard Bond, Daniela Calzetti, C. Marcella Carollo, Michael J. Disney, Michael A. Dopita, Jay A. Frogel, Donald N B Hall, Jon A. Holtzman, Randy A. Kimble, Patrick J. McCarthy, Robert W. O'Connell, Abhijit Saha & 5 others Joseph I. Silk, John T. Trauger, Alistair R. Walker, Bradley C. Whitmore, Rogier Windhorst

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Early Release Science observations of the cluster NGC 3603 with the WFC3 on the refurbished Hubble Space Telescope allow us to study its recent star formation history. Our analysis focuses on stars with Hαexcess emission, a robust indicator of their pre-main sequence (PMS) accreting status. The comparison with theoretical PMS isochrones shows that 2/3 of the objects with Hαexcess emission have ages from 1 to 10 Myr, with a median value of 3 Myr, while a surprising 1/3 of them are older than 10 Myr. The study of the spatial distribution of these PMS stars allows us to confirm their cluster membership and to statistically separate them from field stars. This result establishes unambiguously for the first time that star formation in and around the cluster has been ongoing for at least 10-20 Myr, at an apparently increasing rate.

Original languageEnglish (US)
Pages (from-to)1108-1117
Number of pages10
JournalAstrophysical Journal
Volume720
Issue number2
DOIs
StatePublished - Sep 10 2010

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star clusters
star formation
pre-main sequence stars
star distribution
spatial distribution
Hubble Space Telescope
history
histories
stars
young
indicator
analysis
comparison
rate
science

Keywords

  • Open clusters and associations: individual (NGC 3603)
  • Stars: pre-main sequence

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Beccari, G., Spezzi, L., De Marchi, G., Paresce, F., Young, E., Andersen, M., ... Windhorst, R. (2010). Progressive star formation in the young galactic super star cluster NGC 3603. Astrophysical Journal, 720(2), 1108-1117. https://doi.org/10.1088/0004-637X/720/2/1108

Progressive star formation in the young galactic super star cluster NGC 3603. / Beccari, Giacomo; Spezzi, Loredana; De Marchi, Guido; Paresce, Francesco; Young, Erick; Andersen, Morten; Panagia, Nino; Balick, Bruce; Bond, Howard; Calzetti, Daniela; Carollo, C. Marcella; Disney, Michael J.; Dopita, Michael A.; Frogel, Jay A.; Hall, Donald N B; Holtzman, Jon A.; Kimble, Randy A.; McCarthy, Patrick J.; O'Connell, Robert W.; Saha, Abhijit; Silk, Joseph I.; Trauger, John T.; Walker, Alistair R.; Whitmore, Bradley C.; Windhorst, Rogier.

In: Astrophysical Journal, Vol. 720, No. 2, 10.09.2010, p. 1108-1117.

Research output: Contribution to journalArticle

Beccari, G, Spezzi, L, De Marchi, G, Paresce, F, Young, E, Andersen, M, Panagia, N, Balick, B, Bond, H, Calzetti, D, Carollo, CM, Disney, MJ, Dopita, MA, Frogel, JA, Hall, DNB, Holtzman, JA, Kimble, RA, McCarthy, PJ, O'Connell, RW, Saha, A, Silk, JI, Trauger, JT, Walker, AR, Whitmore, BC & Windhorst, R 2010, 'Progressive star formation in the young galactic super star cluster NGC 3603', Astrophysical Journal, vol. 720, no. 2, pp. 1108-1117. https://doi.org/10.1088/0004-637X/720/2/1108
Beccari G, Spezzi L, De Marchi G, Paresce F, Young E, Andersen M et al. Progressive star formation in the young galactic super star cluster NGC 3603. Astrophysical Journal. 2010 Sep 10;720(2):1108-1117. https://doi.org/10.1088/0004-637X/720/2/1108
Beccari, Giacomo ; Spezzi, Loredana ; De Marchi, Guido ; Paresce, Francesco ; Young, Erick ; Andersen, Morten ; Panagia, Nino ; Balick, Bruce ; Bond, Howard ; Calzetti, Daniela ; Carollo, C. Marcella ; Disney, Michael J. ; Dopita, Michael A. ; Frogel, Jay A. ; Hall, Donald N B ; Holtzman, Jon A. ; Kimble, Randy A. ; McCarthy, Patrick J. ; O'Connell, Robert W. ; Saha, Abhijit ; Silk, Joseph I. ; Trauger, John T. ; Walker, Alistair R. ; Whitmore, Bradley C. ; Windhorst, Rogier. / Progressive star formation in the young galactic super star cluster NGC 3603. In: Astrophysical Journal. 2010 ; Vol. 720, No. 2. pp. 1108-1117.
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