Fragmentation and dynamical collapse of the starless high-mass star-forming region IRDC 18310-4

被引：0
|
作者：
机构：
[1] Beuther, H.
[2] Linz, H.
[3] Tackenberg, J.
[4] Henning, Th.
[5] Krause, O.
[6] Ragan, S.
[7] Nielbock, M.
[8] Launhardt, R.
[9] Bihr, S.
[10] 1,Schmiedeke, A.
[11] Smith, R.
[12] Sakai, T.
来源：
| 1600年 / EDP Sciences卷 / 553期
关键词：
Context. Because of their short evolutionary time-scales; the earliest stages of high-mass star formation prior to the existence of any embedded heating source have barely been characterized until today. Aims. We study the fragmentation and dynamical properties of a massive starless gas clump at the onset of high-mass star formation. Methods. Based on Herschel continuum data we identify a massive gas clump that remains far-infrared dark up to 100 μm wavelengths. The fragmentation and dynamical properties are investigated by means of Plateau de Bure Interferometer and Nobeyama 45 m single-dish spectral line and continuum observations. Results. The massive gas reservoir (between ~800 and ~1600 M⊙; depending on the assumed dust properties) fragments at spatial scales of ~18 000 AU in four cores. Comparing the spatial extent of this high-mass region with intermediate- to low-mass starless cores from the literature; we find that linear sizes do not vary significantly over the whole mass regime. However; the high-mass regions squeeze much more gas into these similar volumes and hence have orders of magnitude larger densities. The fragmentation properties of the presented low-to high-mass regions are consistent with gravitational instable Jeans fragmentation. Furthermore; we find multiple velocity components associated with the resolved cores. Recent radiative transfer hydrodynamic simulations of the dynamic collapse of massive gas clumps also result in multiple velocity components along the line of sight because of the clumpy structure of the regions. This result is supported by a ratio between viral and total gas mass for the whole region;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
相关论文
共 50 条
  • [31] A study of three southern high-mass star-forming regions
    Dedes, C.
    Leurini, S.
    Wyrowski, F.
    Schilke, P.
    Menten, K. M.
    Thorwirth, S.
    Ott, J.
    ASTRONOMY & ASTROPHYSICS, 2011, 526
  • [32] MILLIMETER AND SUBMILLIMETER OBSERVATIONS OF HIGH-MASS STAR-FORMING CORES
    ZYLKA, R
    ASTROPHYSICS AND SPACE SCIENCE, 1995, 224 (1-2) : 189 - 198
  • [33] Star Formation Rates and Ridge Structures in High-Mass Star-Forming Regions
    Quang Nguyen-Luong
    Motte, Frederique
    Hill, Tracey
    Hennemann, Martin
    Louvet, Fabien
    Bontemps, Sylvain
    Schneider, Nicola
    LABYRINTH OF STAR FORMATION, 2014, 36 : 385 - 389
  • [34] Excited Hydroxyl Outflow in the High-mass Star-forming Region G34.26+0.15
    Tan, Wei Siang
    Araya, Esteban D.
    Rigg, Cade
    Hofner, Peter
    Kurtz, Stan
    Linz, Hendrik
    Rosero, Viviana
    ASTROPHYSICAL JOURNAL, 2023, 953 (01):
  • [35] An infrared study of the high-mass, multistage star-forming region IRAS 12272-6240
    Tapia, Mauricio
    Persi, Paolo
    Roth, Miguel
    Elia, Davide
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2020, 496 (03) : 3358 - 3370
  • [36] Dynamical accretion flows: ALMAGAL: Flows along filamentary structures in high-mass star-forming clusters
    Wells, M.R.A.
    Beuther, H.
    Molinari, S.
    Schilke, P.
    Battersby, C.
    Ho, P.
    Sánchez-Monge, Á.
    Jones, B.
    Scheuck, M.B.
    Syed, J.
    Gieser, C.
    Kuiper, R.
    Elia, D.
    Coletta, A.
    Traficante, A.
    Wallace, J.
    Rigby, A.J.
    Klessen, R.S.
    Zhang, Q.
    Walch, S.
    Beltrán, M.T.
    Tang, Y.
    Fuller, G.A.
    Lis, D.C.
    Möller, T.
    Van Der Tak, F.
    Klaassen, P.D.
    Clarke, S.D.
    Moscadelli, L.
    Mininni, C.
    Zinnecker, H.
    Maruccia, Y.
    Pezzuto, S.
    Benedettini, M.
    Soler, J.D.
    Brogan, C.L.
    Avison, A.
    Sanhueza, P.
    Schisano, E.
    Liu, T.
    Fontani, F.
    Rygl, K.L.J.
    Wyrowski, F.
    Bally, J.
    Walker, D.L.
    Ahmadi, A.
    Koch, P.
    Merello, M.
    Law, C.Y.
    Testi, L.
    Astronomy and Astrophysics, 2024, 690
  • [37] Multiscale Dynamical Scenario of High-mass Star Formation in an IRDC Filament G34
    Pan, Sirong
    Liu, Hong-Li
    Qin, Sheng-Li
    ASTROPHYSICAL JOURNAL, 2024, 960 (01):
  • [38] New 6.7 GHz imaging of the high-mass star-forming region CepAHW2
    Durjasza, Michat
    Szymczak, Marian
    15TH EUROPEAN VLBI NETWORK MINI-SYMPOSIUM AND USERS' MEETING, 2023,
  • [39] Modeling the water line emission from the high-mass star-forming region AFGL 2591
    Poelman, D. R.
    van der Tak, F. F. S.
    ASTRONOMY & ASTROPHYSICS, 2007, 475 (03) : 949 - 958
  • [40] Challenging shock models with SOFIA OH observations in the high-mass star-forming region Cepheus A
    Gusdorf, A.
    Guesten, R.
    Menten, K. M.
    Flower, D. R.
    des Forets, G. Pineau
    Codella, C.
    Csengeri, T.
    Gomez-Ruiz, A. I.
    Heyminck, S.
    Jacobs, K.
    Kristensen, L. E.
    Leurini, S.
    Requena-Torres, M. A.
    Wampfler, S. F.
    Wiesemeyer, H.
    Wyrowski, F.
    ASTRONOMY & ASTROPHYSICS, 2016, 585
12345