Massive Star Formation in the Tarantula Nebula

In this work, we present 299 candidate young stellar objects (YSOs) in 30 Doradus discovered using Spitzer and Herschel point-source catalogs, 276 of which are new. We study the parental giant molecular clouds in which these YSO candidates form using recently published Atacama Large Millimeter/submi...

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Veröffentlicht in:The Astrophysical journal 2023-02, Vol.944 (1), p.26
Hauptverfasser: Nayak, Omnarayani, Green, Alex, Hirschauer, Alec S., Indebetouw, Rémy, Meixner, Margaret, Wong, Tony, Chevance, Mélanie, De Marchi, Guido, Lebouteiller, Vianney, Lee, Min-Young, Looney, Leslie W., Madden, Suzanne C., Roman-Duval, Julia, Fukui, Yasuo, Hacar, Alvaro, Jameson, K. E., Kalari, Venu, Oudshoorn, Luuk, Rubio, Mónica, Sabbi, Elena
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container_issue 1
container_start_page 26
container_title The Astrophysical journal
container_volume 944
creator Nayak, Omnarayani
Green, Alex
Hirschauer, Alec S.
Indebetouw, Rémy
Meixner, Margaret
Wong, Tony
Chevance, Mélanie
De Marchi, Guido
Lebouteiller, Vianney
Lee, Min-Young
Looney, Leslie W.
Madden, Suzanne C.
Roman-Duval, Julia
Fukui, Yasuo
Hacar, Alvaro
Jameson, K. E.
Kalari, Venu
Oudshoorn, Luuk
Rubio, Mónica
Sabbi, Elena
description In this work, we present 299 candidate young stellar objects (YSOs) in 30 Doradus discovered using Spitzer and Herschel point-source catalogs, 276 of which are new. We study the parental giant molecular clouds in which these YSO candidates form using recently published Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 7 observations of 12 CO and 13 CO. The threshold for star formation in 30 Doradus inferred by the LTE-based mass surface density is 178 M ⊙ pc −2 , 40% higher than the threshold for star formation in the Milky Way. This increase in star formation threshold in comparison to the Milky Way and increase in line width seen in clumps 11 pc away in comparison to clumps 45 pc away from the R136 super star cluster could be due to injected turbulent energy, increase in interstellar medium pressure, and/or local magnetic field strength. Of the 299 YSO candidates in this work, 62% are not associated with 12 CO molecular gas. This large fraction can be explained by the fact that 75%–97% of the H 2 gas is not traced by CO. We fit a Kroupa initial mass function to the YSO candidates and find that the total integrated stellar mass is 18,000 M ⊙ and that the region has a star formation rate (SFR) of 0.18 M ⊙ yr −1 . The initial mass function determined here applies to the four 150″ × 150″ (37.5 pc × 37.5 pc) subfields and one 150″ × 75″ (37.5 pc × 18.8 pc) subfield observed with ALMA. The SFR in 30 Doradus has increased in the past few million years.
doi_str_mv 10.3847/1538-4357/acac8b
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subjects Astrophysics
Candidates
Clumps
Cosmology and Extra-Galactic Astrophysics
Field strength
Initial mass function
Interstellar matter
Interstellar medium
Magnetic fields
Massive stars
Milky Way
Molecular clouds
Molecular gases
Nebulae
Physics
Radio telescopes
Star & galaxy formation
Star clusters
Star formation
Star formation rate
Stars & galaxies
Stellar mass
Turbulent energy
Young stellar objects
title Massive Star Formation in the Tarantula Nebula
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