Kinematic evidence for feedback-driven star formation in NGC 1893

Beomdu Lim; Hwankyung Sung; Michael S. Bessell; Sangwoo Lee; Jae Joon Lee; Heeyoung Oh; Narae Hwang; Byeong Gon Park; Hyeonoh Hur; Kyeongsoo Hong; Sunkyung Park

doi:10.1093/mnras/sty713

Kinematic evidence for feedback-driven star formation in NGC 1893

Beomdu Lim, Hwankyung Sung, Michael S. Bessell, Sangwoo Lee, Jae Joon Lee, Heeyoung Oh, Narae Hwang, Byeong Gon Park, Hyeonoh Hur, Kyeongsoo Hong, Sunkyung Park

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

OB associations are the prevailing star-forming sites in the Galaxy. Up to now, the process of howOBassociations were formed remained amystery.Apossible process is self-regulating star formation driven by feedback from massive stars. However, although a number of observational studies uncovered various signposts of feedback-driven star formation, the effectiveness of such feedback has been questioned. Stellar and gas kinematics is a promising tool to capture the relative motion of newborn stars and gas away from ionizing sources. We present highresolution spectroscopy of stars and gas in the young open cluster NGC 1893. Our findings show that newborn stars and the tadpole nebula Sim 130 are moving away from the central cluster containing two O-type stars, and that the time-scale of sequential star formation is about 1 Myr within a 9 pc distance. The newborn stars formed by feedback from massive stars account for at least 18 per cent of the total stellar population in the cluster, suggesting that this process can play an important role in the formation of OB associations. These results support the self-regulating star formation model.

Original language	English
Pages (from-to)	1993-2003
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	477
Issue number	2
DOIs	https://doi.org/10.1093/mnras/sty713
Publication status	Published - 21 Jun 2018

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@article{116dc3144262467397ad676acee4cd8f,

title = "Kinematic evidence for feedback-driven star formation in NGC 1893",

abstract = "OB associations are the prevailing star-forming sites in the Galaxy. Up to now, the process of howOBassociations were formed remained amystery.Apossible process is self-regulating star formation driven by feedback from massive stars. However, although a number of observational studies uncovered various signposts of feedback-driven star formation, the effectiveness of such feedback has been questioned. Stellar and gas kinematics is a promising tool to capture the relative motion of newborn stars and gas away from ionizing sources. We present highresolution spectroscopy of stars and gas in the young open cluster NGC 1893. Our findings show that newborn stars and the tadpole nebula Sim 130 are moving away from the central cluster containing two O-type stars, and that the time-scale of sequential star formation is about 1 Myr within a 9 pc distance. The newborn stars formed by feedback from massive stars account for at least 18 per cent of the total stellar population in the cluster, suggesting that this process can play an important role in the formation of OB associations. These results support the self-regulating star formation model.",

keywords = "ISM: Kinematics and dynamics, Open clusters and associations: Individual (NGC 1893), Stars: Formation, Stars: Kinematics and dynamics -HII regions",

author = "Beomdu Lim and Hwankyung Sung and Bessell, {Michael S.} and Sangwoo Lee and Lee, {Jae Joon} and Heeyoung Oh and Narae Hwang and Park, {Byeong Gon} and Hyeonoh Hur and Kyeongsoo Hong and Sunkyung Park",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2018",

month = jun,

day = "21",

doi = "10.1093/mnras/sty713",

language = "English",

volume = "477",

pages = "1993--2003",

journal = "Monthly Notices of the Royal Astronomical Society",

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T1 - Kinematic evidence for feedback-driven star formation in NGC 1893

AU - Lim, Beomdu

AU - Sung, Hwankyung

AU - Bessell, Michael S.

AU - Lee, Sangwoo

AU - Lee, Jae Joon

AU - Oh, Heeyoung

AU - Hwang, Narae

AU - Park, Byeong Gon

AU - Hur, Hyeonoh

AU - Hong, Kyeongsoo

AU - Park, Sunkyung

PY - 2018/6/21

Y1 - 2018/6/21

N2 - OB associations are the prevailing star-forming sites in the Galaxy. Up to now, the process of howOBassociations were formed remained amystery.Apossible process is self-regulating star formation driven by feedback from massive stars. However, although a number of observational studies uncovered various signposts of feedback-driven star formation, the effectiveness of such feedback has been questioned. Stellar and gas kinematics is a promising tool to capture the relative motion of newborn stars and gas away from ionizing sources. We present highresolution spectroscopy of stars and gas in the young open cluster NGC 1893. Our findings show that newborn stars and the tadpole nebula Sim 130 are moving away from the central cluster containing two O-type stars, and that the time-scale of sequential star formation is about 1 Myr within a 9 pc distance. The newborn stars formed by feedback from massive stars account for at least 18 per cent of the total stellar population in the cluster, suggesting that this process can play an important role in the formation of OB associations. These results support the self-regulating star formation model.

AB - OB associations are the prevailing star-forming sites in the Galaxy. Up to now, the process of howOBassociations were formed remained amystery.Apossible process is self-regulating star formation driven by feedback from massive stars. However, although a number of observational studies uncovered various signposts of feedback-driven star formation, the effectiveness of such feedback has been questioned. Stellar and gas kinematics is a promising tool to capture the relative motion of newborn stars and gas away from ionizing sources. We present highresolution spectroscopy of stars and gas in the young open cluster NGC 1893. Our findings show that newborn stars and the tadpole nebula Sim 130 are moving away from the central cluster containing two O-type stars, and that the time-scale of sequential star formation is about 1 Myr within a 9 pc distance. The newborn stars formed by feedback from massive stars account for at least 18 per cent of the total stellar population in the cluster, suggesting that this process can play an important role in the formation of OB associations. These results support the self-regulating star formation model.

KW - ISM: Kinematics and dynamics

KW - Open clusters and associations: Individual (NGC 1893)

KW - Stars: Formation

KW - Stars: Kinematics and dynamics -HII regions

UR - http://www.scopus.com/inward/record.url?scp=85047134711&partnerID=8YFLogxK

U2 - 10.1093/mnras/sty713

DO - 10.1093/mnras/sty713

M3 - Article

SN - 0035-8711

VL - 477

SP - 1993

EP - 2003

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Kinematic evidence for feedback-driven star formation in NGC 1893

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