KINEMATIC STRUCTURE OF MOLECULAR GAS AROUND HIGH-MASS YSO, PAPILLON NEBULA, IN N159 EAST IN THE LARGE MAGELLANIC CLOUD: A NEW PERSPECTIVE WITH ALMA

• Published in: Astrophysical journal. Letters 2017-01, Vol.835 (1), p.108
• Main Authors: Saigo, Kazuya, Onishi, Toshikazu, Nayak, Omnarayani, Meixner, Margaret, Tokuda, Kazuki, Harada, Ryohei, Morioka, Yuuki, Sewi o, Marta, Indebetouw, Remy, Torii, Kazufumi, Kawamura, Akiko, Ohama, Akio, Hattori, Yusuke, Yamamoto, Hiroaki, Tachihara, Kengo, Minamidani, Tetsuhiro, Inoue, Tsuyoshi, Madden, Suzanne, Galametz, Maud, Lebouteiller, Vianney, Chen, C.-H. Rosie, Mizuno, Norikazu, Fukui, Yasuo
• Format: Article
• Language: English
• Subjects: Astrophysics; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CARBON 12; CARBON 13; CARBON MONOXIDE; Cloud formation; Clouds; COLLISIONS; Cosmology and Extra-Galactic Astrophysics; DUSTS; EMISSION; EXCITATION; FASTENERS; Galactic Astrophysics; Galaxies; GHZ RANGE; High Energy Astrophysical Phenomena; Instrumentation and Methods for Astrophysic; ISM: clouds; ISM: kinematics and dynamics; ISM: molecules; Kinematics; MAGELLANIC CLOUDS; MASS; Massive stars; Molecular clouds; Molecular gases; Molecular structure; MOLECULES; NEBULAE; Physics; RECOMBINATION; Star & galaxy formation; Star formation; STARS; stars: formation; Thermal emission
• ISSN: 0004-637X; 2041-8205; 1538-4357; 2041-8213
• DOI: 10.3847/1538-4357/835/1/108

ABSTRACT We present the ALMA Band 3 and Band 6 results of 12CO(2-1), 13CO(2-1), H30 recombination line, free-free emission around 98 GHz, and the dust thermal emission around 230 GHz toward the N159 East Giant Molecular Cloud (N159E) in the Large Magellanic Cloud (LMC). LMC is the nearest active high-mass star-forming face-on galaxy at a distance of 50 kpc and is the best target for studing high-mass star formation. ALMA observations show that N159E is the complex of filamentary clouds with the width and length of ∼1 pc and several parsecs. The total molecular mass is 0.92 × 105 M from the 13CO(2-1) intensity. N159E harbors the well-known Papillon Nebula, a compact high-excitation H ii region. We found that a YSO associated with the Papillon Nebula has the mass of 35 M and is located at the intersection of three filamentary clouds. It indicates that the formation of the high-mass YSO was induced by the collision of filamentary clouds. Fukui et al. reported a similar kinematic structure toward two YSOs in the N159 West region, which are the other YSOs that have the mass of 35 M . This suggests that the collision of filamentary clouds is a primary mechanism of high-mass star formation. We found a small molecular hole around the YSO in Papillon Nebula with a sub-parsec scale. It is filled by free-free and H30 emission. The temperature of the molecular gas around the hole reaches ∼80 K. It indicates that this YSO has just started the distruction of parental molecular cloud.