STAR FORMATION HISTORY IN THE SMALL MAGELLANIC CLOUD: THE CASE OF NGC 602

Cignoni, M; Sabbi, E; Nota, A; Meixner, M; Sirianni, M; Smith, L J; Tosi, M; Angeretti, L; Degl'Innocenti, S; Moroni, P G. Prada; Carlson, Lynn Redding

doi:10.1088/0004-6256/137/3/3668; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

Title: STAR FORMATION HISTORY IN THE SMALL MAGELLANIC CLOUD: THE CASE OF NGC 602

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Abstract

Deep Hubble Space Telescope/Advanced Camera for Surveys photometry of the young cluster NGC 602, located in the remote low-density 'wing' of the Small Magellanic Cloud (SMC), reveals numerous pre-main-sequence (PMS) stars as well as young stars on the main sequence. The resolved stellar content thus provides a basis for studying the star formation history (SFH) into recent times and constraining several stellar population properties, such as the present-day mass function (PDMF), the initial mass function, and the binary fraction. To better characterize the PMS population, we present a new set of model stellar evolutionary tracks for this evolutionary phase with metallicity appropriate for the SMC (Z = 0.004). We use a stellar population synthesis code, which takes into account a full range of stellar evolution phases to derive our best estimate for the SFH in the region by comparing observed and synthetic color-magnitude diagrams. The derived PDMF for NGC 602 is consistent with that resulting from the synthetic diagrams. The star formation rate in the region has increased with time on a scale of tens of Myr, reaching (0.3-0.7) x 10{sup -3} M {sub sun} yr{sup -1} in the last 2.5 Myr, comparable to what is found in Galactic OBmore »« less

Authors:

Cignoni, M ^[1]; Sabbi, E; Nota, A; Meixner, M; Sirianni, M; Smith, L J ^[2]; Tosi, M; Angeretti, L ^[3]; Degl'Innocenti, S; Moroni, P G. Prada ^[4]; Carlson, Lynn Redding ^[5]

Dipartimento di Astronomia, Universita degli Studi di Bologna, via Ranzani 1, I-40127 Bologna (Italy)
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD (United States)
Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna (Italy)
Dipartimento di Fisica 'Enrico Fermi', Universita di Pisa, largo Pontecorvo 3, Pisa I-56127 (Italy)
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD (United States)

Publication Date:: Sun Mar 15 00:00:00 EDT 2009

OSTI Identifier:: 21269273

Resource Type:: Journal Article

Journal Name:: Astronomical Journal (New York, N.Y. Online)

Additional Journal Information:: Journal Volume: 137; Journal Issue: 3; Other Information: DOI: 10.1088/0004-6256/137/3/3668; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; INTERGALACTIC SPACE; MAGELLANIC CLOUDS; NEBULAE; PARTICLE TRACKS; PHOTOMETRY; STAR CLUSTERS; STAR EVOLUTION; STARS; TELESCOPES

Citation Formats


                    Cignoni, M, Sabbi, E, Nota, A, Meixner, M, Sirianni, M, Smith, L J, Tosi, M, Angeretti, L, Degl'Innocenti, S, Moroni, P G. Prada, Carlson, Lynn Redding, and Gallagher, J. STAR FORMATION HISTORY IN THE SMALL MAGELLANIC CLOUD: THE CASE OF NGC 602.  United States: N. p., 2009. 
        Web.  doi:10.1088/0004-6256/137/3/3668; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).

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                    Cignoni, M, Sabbi, E, Nota, A, Meixner, M, Sirianni, M, Smith, L J, Tosi, M, Angeretti, L, Degl'Innocenti, S, Moroni, P G. Prada, Carlson, Lynn Redding, & Gallagher, J. STAR FORMATION HISTORY IN THE SMALL MAGELLANIC CLOUD: THE CASE OF NGC 602.  United States.  https://doi.org/10.1088/0004-6256/137/3/3668; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

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                    Cignoni, M, Sabbi, E, Nota, A, Meixner, M, Sirianni, M, Smith, L J, Tosi, M, Angeretti, L, Degl'Innocenti, S, Moroni, P G. Prada, Carlson, Lynn Redding, and Gallagher, J. 2009.  
        "STAR FORMATION HISTORY IN THE SMALL MAGELLANIC CLOUD: THE CASE OF NGC 602".  United States.  https://doi.org/10.1088/0004-6256/137/3/3668; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).

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@article{osti_21269273,

  title        = {STAR FORMATION HISTORY IN THE SMALL MAGELLANIC CLOUD: THE CASE OF NGC 602},

  author       = {Cignoni, M and Sabbi, E and Nota, A and Meixner, M and Sirianni, M and Smith, L J and Tosi, M and Angeretti, L and Degl'Innocenti, S and Moroni, P G. Prada and Carlson, Lynn Redding and Gallagher, J.},

  abstractNote = {Deep Hubble Space Telescope/Advanced Camera for Surveys photometry of the young cluster NGC 602, located in the remote low-density 'wing' of the Small Magellanic Cloud (SMC), reveals numerous pre-main-sequence (PMS) stars as well as young stars on the main sequence. The resolved stellar content thus provides a basis for studying the star formation history (SFH) into recent times and constraining several stellar population properties, such as the present-day mass function (PDMF), the initial mass function, and the binary fraction. To better characterize the PMS population, we present a new set of model stellar evolutionary tracks for this evolutionary phase with metallicity appropriate for the SMC (Z = 0.004). We use a stellar population synthesis code, which takes into account a full range of stellar evolution phases to derive our best estimate for the SFH in the region by comparing observed and synthetic color-magnitude diagrams. The derived PDMF for NGC 602 is consistent with that resulting from the synthetic diagrams. The star formation rate in the region has increased with time on a scale of tens of Myr, reaching (0.3-0.7) x 10{sup -3} M {sub sun} yr{sup -1} in the last 2.5 Myr, comparable to what is found in Galactic OB associations. Star formation is most complete in the main cluster but continues at moderate levels in the gas-rich periphery of the nebula.},

  doi          = {10.1088/0004-6256/137/3/3668; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},

  url          = {https://www.osti.gov/biblio/21269273},
  journal      = {Astronomical Journal (New York, N.Y. Online)},

  issn         = {1538-3881},

  number       = 3,

  volume       = 137,

  place        = {United States},

  year         = {Sun Mar 15 00:00:00 EDT 2009},

  month        = {Sun Mar 15 00:00:00 EDT 2009}

}

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https://doi.org/10.1088/0004-6256/137/3/3668; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

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