Molecular clouds toward the super star cluster NGC 3603; possible evidence for a cloud-cloud collision in triggering the cluster formation

Y. Fukui; A. Ohama; N. Hanaoka; N. Furukawa; K. Torii; J. R. Dawson; N. Mizuno; K. Hasegawa; T. Fukuda; S. Soga; N. Moribe; Y. Kuroda; T. Hayakawa; A. Kawamura; T. Kuwahara; H. Yamamoto; T. Okuda; T. Onishi; H. Maezawa; A. Mizuno

doi:10.1088/0004-637X/780/1/36

Molecular clouds toward the super star cluster NGC 3603; possible evidence for a cloud-cloud collision in triggering the cluster formation

Y. Fukui, A. Ohama, N. Hanaoka, N. Furukawa, K. Torii, J. R. Dawson, N. Mizuno, K. Hasegawa, T. Fukuda, S. Soga, N. Moribe, Y. Kuroda, T. Hayakawa, A. Kawamura, T. Kuwahara, H. Yamamoto, T. Okuda, T. Onishi, H. Maezawa, A. Mizuno

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Abstract

We present new large field observations of molecular clouds with NANTEN2 toward the super star cluster NGC 3603 in the transitions ¹²CO(J = 2-1, J = 1-0) and ¹³CO(J = 2-1, J = 1-0). We suggest that two molecular clouds at 13 km s^-1 and 28 km s^-1 are associated with NGC 3603 as evidenced by higher temperatures toward the H II region, as well as morphological correspondence. The mass of the clouds is too small to gravitationally bind them, given their relative motion of ∼20 km s ^-1. We suggest that the two clouds collided with each other 1 Myr ago to trigger the formation of the super star cluster. This scenario is able to explain the origin of the highest mass stellar population in the cluster, which is as young as 1 Myr and is segregated within the central sub-pc of the cluster. This is the second super star cluster along with Westerlund 2 where formation may have been triggered by a cloud-cloud collision.

Original language	English
Article number	36
Pages (from-to)	1-13
Number of pages	13
Journal	Astrophysical Journal
Volume	780
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/780/1/36
Publication status	Published - 1 Jan 2014
Externally published	Yes

Bibliographical note

Copyright 2014 The American Astronomical Society. First published in the Astrophysical Journal, 780(1), 36, 2014. The original publication is available at http://dx.doi.org/10.1088/0004-637X/780/1/36, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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Fukui, Y., Ohama, A., Hanaoka, N., Furukawa, N., Torii, K., Dawson, J. R., Mizuno, N., Hasegawa, K., Fukuda, T., Soga, S., Moribe, N., Kuroda, Y., Hayakawa, T., Kawamura, A., Kuwahara, T., Yamamoto, H., Okuda, T., Onishi, T., Maezawa, H., & Mizuno, A. (2014). Molecular clouds toward the super star cluster NGC 3603; possible evidence for a cloud-cloud collision in triggering the cluster formation. Astrophysical Journal, 780(1), 1-13. Article 36. https://doi.org/10.1088/0004-637X/780/1/36

@article{f5e5263f9edf40df8377a6a17c89d1bc,

title = "Molecular clouds toward the super star cluster NGC 3603; possible evidence for a cloud-cloud collision in triggering the cluster formation",

abstract = "We present new large field observations of molecular clouds with NANTEN2 toward the super star cluster NGC 3603 in the transitions 12CO(J = 2-1, J = 1-0) and 13CO(J = 2-1, J = 1-0). We suggest that two molecular clouds at 13 km s-1 and 28 km s-1 are associated with NGC 3603 as evidenced by higher temperatures toward the H II region, as well as morphological correspondence. The mass of the clouds is too small to gravitationally bind them, given their relative motion of ∼20 km s -1. We suggest that the two clouds collided with each other 1 Myr ago to trigger the formation of the super star cluster. This scenario is able to explain the origin of the highest mass stellar population in the cluster, which is as young as 1 Myr and is segregated within the central sub-pc of the cluster. This is the second super star cluster along with Westerlund 2 where formation may have been triggered by a cloud-cloud collision.",

author = "Y. Fukui and A. Ohama and N. Hanaoka and N. Furukawa and K. Torii and Dawson, {J. R.} and N. Mizuno and K. Hasegawa and T. Fukuda and S. Soga and N. Moribe and Y. Kuroda and T. Hayakawa and A. Kawamura and T. Kuwahara and H. Yamamoto and T. Okuda and T. Onishi and H. Maezawa and A. Mizuno",

note = "Copyright 2014 The American Astronomical Society. First published in the Astrophysical Journal, 780(1), 36, 2014. The original publication is available at http://dx.doi.org/10.1088/0004-637X/780/1/36, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2014",

month = jan,

day = "1",

doi = "10.1088/0004-637X/780/1/36",

language = "English",

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Fukui, Y, Ohama, A, Hanaoka, N, Furukawa, N, Torii, K, Dawson, JR, Mizuno, N, Hasegawa, K, Fukuda, T, Soga, S, Moribe, N, Kuroda, Y, Hayakawa, T, Kawamura, A, Kuwahara, T, Yamamoto, H, Okuda, T, Onishi, T, Maezawa, H & Mizuno, A 2014, 'Molecular clouds toward the super star cluster NGC 3603; possible evidence for a cloud-cloud collision in triggering the cluster formation', Astrophysical Journal, vol. 780, no. 1, 36, pp. 1-13. https://doi.org/10.1088/0004-637X/780/1/36

TY - JOUR

T1 - Molecular clouds toward the super star cluster NGC 3603; possible evidence for a cloud-cloud collision in triggering the cluster formation

AU - Fukui, Y.

AU - Ohama, A.

AU - Hanaoka, N.

AU - Furukawa, N.

AU - Torii, K.

AU - Dawson, J. R.

AU - Mizuno, N.

AU - Hasegawa, K.

AU - Fukuda, T.

AU - Soga, S.

AU - Moribe, N.

AU - Kuroda, Y.

AU - Hayakawa, T.

AU - Kawamura, A.

AU - Kuwahara, T.

AU - Yamamoto, H.

AU - Okuda, T.

AU - Onishi, T.

AU - Maezawa, H.

AU - Mizuno, A.

N1 - Copyright 2014 The American Astronomical Society. First published in the Astrophysical Journal, 780(1), 36, 2014. The original publication is available at http://dx.doi.org/10.1088/0004-637X/780/1/36, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - We present new large field observations of molecular clouds with NANTEN2 toward the super star cluster NGC 3603 in the transitions 12CO(J = 2-1, J = 1-0) and 13CO(J = 2-1, J = 1-0). We suggest that two molecular clouds at 13 km s-1 and 28 km s-1 are associated with NGC 3603 as evidenced by higher temperatures toward the H II region, as well as morphological correspondence. The mass of the clouds is too small to gravitationally bind them, given their relative motion of ∼20 km s -1. We suggest that the two clouds collided with each other 1 Myr ago to trigger the formation of the super star cluster. This scenario is able to explain the origin of the highest mass stellar population in the cluster, which is as young as 1 Myr and is segregated within the central sub-pc of the cluster. This is the second super star cluster along with Westerlund 2 where formation may have been triggered by a cloud-cloud collision.

AB - We present new large field observations of molecular clouds with NANTEN2 toward the super star cluster NGC 3603 in the transitions 12CO(J = 2-1, J = 1-0) and 13CO(J = 2-1, J = 1-0). We suggest that two molecular clouds at 13 km s-1 and 28 km s-1 are associated with NGC 3603 as evidenced by higher temperatures toward the H II region, as well as morphological correspondence. The mass of the clouds is too small to gravitationally bind them, given their relative motion of ∼20 km s -1. We suggest that the two clouds collided with each other 1 Myr ago to trigger the formation of the super star cluster. This scenario is able to explain the origin of the highest mass stellar population in the cluster, which is as young as 1 Myr and is segregated within the central sub-pc of the cluster. This is the second super star cluster along with Westerlund 2 where formation may have been triggered by a cloud-cloud collision.

UR - http://www.scopus.com/inward/record.url?scp=84890487107&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/780/1/36

DO - 10.1088/0004-637X/780/1/36

M3 - Article

AN - SCOPUS:84890487107

SN - 0004-637X

VL - 780

SP - 1

EP - 13

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 36

ER -

Molecular clouds toward the super star cluster NGC 3603; possible evidence for a cloud-cloud collision in triggering the cluster formation

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