Embedded Young Stellar Objects near H72.97-69.39: A Forming Super Star Cluster in N79

Omnarayani Nayak; Conor Nally; Alec S. Hirschauer; Olivia C. Jones; Jeroen Jaspers; Laura Lenkić; Margaret Meixner; Nolan Habel; Megan Reiter; Laurie Chu; Patrick J. Kavanagh; Massimo Robberto; B. A. Sargent

doi:10.3847/1538-4357/ad7baf

The Astrophysical Journal (Jan 2024)

Embedded Young Stellar Objects near H72.97-69.39: A Forming Super Star Cluster in N79

Omnarayani Nayak,
Conor Nally,
Alec S. Hirschauer,
Olivia C. Jones,
Jeroen Jaspers,
Laura Lenkić,
Margaret Meixner,
Nolan Habel,
Megan Reiter,
Laurie Chu,
Patrick J. Kavanagh,
Massimo Robberto,
B. A. Sargent

Affiliations

Omnarayani Nayak: ORCiD; Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA ; [email protected]; NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD, USA
Conor Nally: ORCiD; Institute for Astronomy, University of Edinburgh , Blackford Hill, Edinburgh EH9 3HJ, UK
Alec S. Hirschauer: ORCiD; Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA ; [email protected]
Olivia C. Jones: ORCiD; UK Astronomy Technology Centre , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
Jeroen Jaspers: ORCiD; Department of Experimental Physics, Maynooth University , Maynooth, Co Kildare, Ireland; Dublin Institute for Advanced Studies , School of Cosmic Physics, Astronomy & Astrophysics Section, 31 Fitzwilliam Place, Dublin 2, Ireland
Laura Lenkić: ORCiD; Stratospheric Observatory for Infrared Astronomy , NASA Ames Research Center, Mail Stop 204-14, Moffett Field, CA 94035, USA; Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Margaret Meixner: ORCiD; Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Nolan Habel: ORCiD; Stratospheric Observatory for Infrared Astronomy , NASA Ames Research Center, Mail Stop 204-14, Moffett Field, CA 94035, USA; Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Megan Reiter: ORCiD; Department of Physics & Astronomy, Rice University , 6100 Main Street, Houston, TX 77005, USA
Laurie Chu: ORCiD; Infrared Processing and Analysis Center, California Institute of Technology , 1200 E California Boulevard, Pasadena, CA 91125, USA
Patrick J. Kavanagh: ORCiD; Department of Experimental Physics, Maynooth University , Maynooth, Co Kildare, Ireland
Massimo Robberto: ORCiD; Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA ; [email protected]; Department of Physics & Astronomy, Johns Hopkins University , 3400 N. Charles Street, Baltimore, MD 21218, USA
B. A. Sargent: ORCiD; Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA ; [email protected]; Department of Physics & Astronomy, Johns Hopkins University , 3400 N. Charles Street, Baltimore, MD 21218, USA

DOI: https://doi.org/10.3847/1538-4357/ad7baf
Journal volume & issue: Vol. 975, no. 2
p. 262

Abstract

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We present 102 embedded young stellar object (YSO) candidates associated with the H72.97-69.39 super star cluster (SSC) in the Large Magellanic Cloud (LMC). With the use of the James Webb Space Telescope Mid-Infrared Instrument (MIRI) imaging mode, we utilize an F770W – F1000W versus F1000W color–magnitude diagram to select 70 YSO candidates. An additional 27 YSO candidates are selected based on model fitting using the four MIRI imaging filters employed for this study (F770W, F1000W, F1500W, and F2100W). The central region of H72.97-69.39 is saturated in MIRI imaging, however it is covered by observations made with the Medium Resolution Spectrometer (MRS), leading to the identification of five additional massive YSOs. The total star formation rate inferred based on the 102 YSO candidates is 0.02 M _⊙ yr ^−1 , similar to other high-mass star-forming regions in the LMC which have undergone several generations of starburst events. Due to its young age, however, H72.97-69.39's stellar production rate is expected to increase. The central five YSOs identified with MRS have masses ranging from 21.1 to 40.3 M _⊙ and total luminosity over 10 ^6 L _⊙ , making H72.97-69.39 a very compact and luminous star-forming region similar to other known SSCs. We theorize that the central five massive YSOs were formed via filamentary collision, while other YSO candidates of varying masses were triggered by wind, radiation, and expanding H ii shells based on their spatial distribution.

Young stellar objects

Published in The Astrophysical Journal

ISSN: 1538-4357 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy: Astrophysics
Website: https://iopscience.iop.org/journal/0004-637X

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