Feedback in W49A diagnosed with radio recombination lines and models

M. R. Rugel; D. Rahner; H. Beuther; E. W. Pellegrini; Y. Wang; J. D. Soler; J. Ott; A. Brunthaler; L. D. Anderson; J. C. Mottram; T. Henning; P. F. Goldsmith; M. Heyer; R. S. Klessen; S. Bihr; K. M. Menten; R. J. Smith; J. S. Urquhart; S. E. Ragan; S. C.O. Glover; N. M. McClure-Griffiths; F. Bigiel; N. Roy

doi:10.1051/0004-6361/201834068

Feedback in W49A diagnosed with radio recombination lines and models

M. R. Rugel, D. Rahner, H. Beuther, E. W. Pellegrini, Y. Wang, J. D. Soler, J. Ott, A. Brunthaler, L. D. Anderson, J. C. Mottram, T. Henning, P. F. Goldsmith, M. Heyer, R. S. Klessen, S. Bihr, K. M. Menten, R. J. Smith, J. S. Urquhart, S. E. Ragan, S. C.O. GloverN. M. McClure-Griffiths, F. Bigiel, N. Roy

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Abstract

We present images of radio recombination lines (RRLs) at wavelengths around 17 cm from the star-forming region W49A to determine the kinematics of ionized gas in the THOR survey (The H» I/OH/Recombination line survey of the inner Milky Way) at an angular resolution of 16.′′8 × 13.′′8. The distribution of ionized gas appears to be affected by feedback processes from the star clusters in W49A. The velocity structure of the RRLs shows a complex behavior with respect to the molecular gas. We find a shell-like distribution of ionized gas as traced by RRL emission surrounding the central cluster of OB stars in W49A. We describe the evolution of the shell with the recent feedback model code WARPFIELD that includes the important physical processes and has previously been applied to the 30 Doradus region in the Large Magellanic Cloud. The cloud structure and dynamics of W49A are in agreement with a feedback-driven shell that is re-collapsing. The shell may have triggered star formation in other parts of W49A. We suggest that W49A is a potential candidate for star formation regulated by feedback-driven and re-collapsing shells.

Original language	English
Article number	A48
Journal	Astronomy and Astrophysics
Volume	622
DOIs	https://doi.org/10.1051/0004-6361/201834068
Publication status	Published - 1 Feb 2019

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Rugel, M. R., Rahner, D., Beuther, H., Pellegrini, E. W., Wang, Y., Soler, J. D., Ott, J., Brunthaler, A., Anderson, L. D., Mottram, J. C., Henning, T., Goldsmith, P. F., Heyer, M., Klessen, R. S., Bihr, S., Menten, K. M., Smith, R. J., Urquhart, J. S., Ragan, S. E., ... Roy, N. (2019). Feedback in W49A diagnosed with radio recombination lines and models. Astronomy and Astrophysics, 622, Article A48. https://doi.org/10.1051/0004-6361/201834068

@article{f6d9d8cf6cfd4887bcc480bb67ba6b2b,

title = "Feedback in W49A diagnosed with radio recombination lines and models",

abstract = "We present images of radio recombination lines (RRLs) at wavelengths around 17 cm from the star-forming region W49A to determine the kinematics of ionized gas in the THOR survey (The H» I/OH/Recombination line survey of the inner Milky Way) at an angular resolution of 16.′′8 × 13.′′8. The distribution of ionized gas appears to be affected by feedback processes from the star clusters in W49A. The velocity structure of the RRLs shows a complex behavior with respect to the molecular gas. We find a shell-like distribution of ionized gas as traced by RRL emission surrounding the central cluster of OB stars in W49A. We describe the evolution of the shell with the recent feedback model code WARPFIELD that includes the important physical processes and has previously been applied to the 30 Doradus region in the Large Magellanic Cloud. The cloud structure and dynamics of W49A are in agreement with a feedback-driven shell that is re-collapsing. The shell may have triggered star formation in other parts of W49A. We suggest that W49A is a potential candidate for star formation regulated by feedback-driven and re-collapsing shells.",

keywords = "HII regions, ISM: bubbles, ISM: individual objects: W49A, ISM: kinematics and dynamics, Radio lines: ISM",

author = "Rugel, {M. R.} and D. Rahner and H. Beuther and Pellegrini, {E. W.} and Y. Wang and Soler, {J. D.} and J. Ott and A. Brunthaler and Anderson, {L. D.} and Mottram, {J. C.} and T. Henning and Goldsmith, {P. F.} and M. Heyer and Klessen, {R. S.} and S. Bihr and Menten, {K. M.} and Smith, {R. J.} and Urquhart, {J. S.} and Ragan, {S. E.} and Glover, {S. C.O.} and McClure-Griffiths, {N. M.} and F. Bigiel and N. Roy",

note = "Publisher Copyright: {\textcopyright} ESO 2019.",

year = "2019",

month = feb,

day = "1",

doi = "10.1051/0004-6361/201834068",

language = "English",

volume = "622",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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Rugel, MR, Rahner, D, Beuther, H, Pellegrini, EW, Wang, Y, Soler, JD, Ott, J, Brunthaler, A, Anderson, LD, Mottram, JC, Henning, T, Goldsmith, PF, Heyer, M, Klessen, RS, Bihr, S, Menten, KM, Smith, RJ, Urquhart, JS, Ragan, SE, Glover, SCO, McClure-Griffiths, NM, Bigiel, F & Roy, N 2019, 'Feedback in W49A diagnosed with radio recombination lines and models', Astronomy and Astrophysics, vol. 622, A48. https://doi.org/10.1051/0004-6361/201834068

TY - JOUR

T1 - Feedback in W49A diagnosed with radio recombination lines and models

AU - Rugel, M. R.

AU - Rahner, D.

AU - Beuther, H.

AU - Pellegrini, E. W.

AU - Wang, Y.

AU - Soler, J. D.

AU - Ott, J.

AU - Brunthaler, A.

AU - Anderson, L. D.

AU - Mottram, J. C.

AU - Henning, T.

AU - Goldsmith, P. F.

AU - Heyer, M.

AU - Klessen, R. S.

AU - Bihr, S.

AU - Menten, K. M.

AU - Smith, R. J.

AU - Urquhart, J. S.

AU - Ragan, S. E.

AU - Glover, S. C.O.

AU - McClure-Griffiths, N. M.

AU - Bigiel, F.

AU - Roy, N.

PY - 2019/2/1

Y1 - 2019/2/1

N2 - We present images of radio recombination lines (RRLs) at wavelengths around 17 cm from the star-forming region W49A to determine the kinematics of ionized gas in the THOR survey (The H» I/OH/Recombination line survey of the inner Milky Way) at an angular resolution of 16.′′8 × 13.′′8. The distribution of ionized gas appears to be affected by feedback processes from the star clusters in W49A. The velocity structure of the RRLs shows a complex behavior with respect to the molecular gas. We find a shell-like distribution of ionized gas as traced by RRL emission surrounding the central cluster of OB stars in W49A. We describe the evolution of the shell with the recent feedback model code WARPFIELD that includes the important physical processes and has previously been applied to the 30 Doradus region in the Large Magellanic Cloud. The cloud structure and dynamics of W49A are in agreement with a feedback-driven shell that is re-collapsing. The shell may have triggered star formation in other parts of W49A. We suggest that W49A is a potential candidate for star formation regulated by feedback-driven and re-collapsing shells.

AB - We present images of radio recombination lines (RRLs) at wavelengths around 17 cm from the star-forming region W49A to determine the kinematics of ionized gas in the THOR survey (The H» I/OH/Recombination line survey of the inner Milky Way) at an angular resolution of 16.′′8 × 13.′′8. The distribution of ionized gas appears to be affected by feedback processes from the star clusters in W49A. The velocity structure of the RRLs shows a complex behavior with respect to the molecular gas. We find a shell-like distribution of ionized gas as traced by RRL emission surrounding the central cluster of OB stars in W49A. We describe the evolution of the shell with the recent feedback model code WARPFIELD that includes the important physical processes and has previously been applied to the 30 Doradus region in the Large Magellanic Cloud. The cloud structure and dynamics of W49A are in agreement with a feedback-driven shell that is re-collapsing. The shell may have triggered star formation in other parts of W49A. We suggest that W49A is a potential candidate for star formation regulated by feedback-driven and re-collapsing shells.

KW - HII regions

KW - ISM: bubbles

KW - ISM: individual objects: W49A

KW - ISM: kinematics and dynamics

KW - Radio lines: ISM

UR - http://www.scopus.com/inward/record.url?scp=85060886705&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201834068

DO - 10.1051/0004-6361/201834068

M3 - Article

SN - 0004-6361

VL - 622

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A48

ER -

Feedback in W49A diagnosed with radio recombination lines and models

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