A 10,000 Year Old Explosion in Dr21

Zapata, Luis A.; Schmid-Burgk, J.; Pérez-Goytia, Nadia; Ho, Paul T. P.; Rodrı́guez, Luis F.; Loinard, Laurent; Cruz-González, I.

doi:10.1088/2041-8205/765/2/l29

Cited by 36 publications

(40 citation statements)

References 16 publications

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“…The competitive accretion scenario could also explain the large-scale CO outflow detected in MonR2, which emanates from the cluster but for which no powering source has been identified yet (Tafalla et al 1997;Giannakopoulou et al 1997). Since the stellar densities at the center of the MonR2 clump are very high, close dynamical encounters are likely to occur as proposed for the large-scale and powerful CO outflows detected in the Orion BN/KL and DR 21 high-mass star forming regions (see Zapata et al 2009Zapata et al , 2013Rivilla et al 2013aRivilla et al , 2014. A large-scale SMA mosaic covering the extent of the MonR2 CO outflow is needed to verify this hypothesis.…”

Section: Competitive Accretion As Possible Origin Of the Monr2 Star Cmentioning

confidence: 97%

Submillimeter Array High-Angular Resolution Observations of the Monoceros R2 Star-Forming Cluster

Dierickx

Jiménez-Serra

Rivilla

et al. 2015

ApJ

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We present the first high-angular resolution study of the MonR2 star-forming complex carried out with the Submillimeter Array at (sub-)millimeter wavelengths. We image the continuum and molecular line emission toward the young stellar objects in MonR2 at 0.85 mm and 1.3 mm, with resolutions ranging from 0.5" to ∼ 3". While freefree emission dominates the IRS1 and IRS2 continuum, dust thermal emission prevails for IRS3 and IRS5, giving envelope masses of ∼0.1-0.3 M ⊙ . IRS5 splits into at least two sub-arcsecond scale sources, IRS5B and the more massive IRS5A. Our 12 CO(2-1) images reveal 11 previously unknown molecular outflows in the MonR2 clump. Comparing these outflows with known IR sources in the IRS5 and IRS3 subclusters allows for tentative identification of driving stars. Line images of molecular species such as CH 3 CN or CH 3 OH show that, besides IRS3 (a well-known hot molecular core), IRS5 is also a chemically active source in the region. The gas excitation temperature derived from CH 3 CN lines toward IRS5 is 144 ± 15 K, indicating a deeply embedded protostar at the hot-core evolutionary stage. SED fitting of IRS5 gives a mass of ∼7 M ⊙ and a luminosity of 300 L ⊙ for the central source. The derived physical properties of the CO outflows suggest that they contribute to the turbulent support of the MonR2 complex and to the gas velocity dispersion in the clump's center. The detection of a large number of CO outflows widespread across the region supports the competitive accretion scenario as origin of the MonR2 star cluster.

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Section: Competitive Accretion As Possible Origin Of the Monr2 Star Cmentioning

confidence: 97%

Submillimeter Array High-Angular Resolution Observations of the Monoceros R2 Star-Forming Cluster

Dierickx

Jiménez-Serra

Rivilla

et al. 2015

ApJ

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“…Though rare, the explosive outflow morphology of the OMC1 BN/KL outflow is not unique; other possible examples include G34.25+0.16 in the inner Galaxy (Cyganowski et al 2008), source G in W49 (Smith et al 2009), IRAS 05506+2414 (Sahai et al 2008), DR21 (Zapata et al 2013) and possibly the low-luminosity source of the molecular hydrogen outflow MHO 2714 (GGD 34) in NGC 7129 (Eislöffel 2000). However, Orion BN/KL is the nearest and least obscured, and thus most accessible for high-resolution studies.…”

Section: Introductionmentioning

confidence: 99%

The Orion fingers: Near-IR adaptive optics imaging of an explosive protostellar outflow

Bally¹,

Ginsburg²,

Silvia

et al. 2015

A&A

132

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Aims. Adaptive optics (AO) images are used to test the hypothesis that the explosive BN/KL outflow from the Orion OMC1 cloud core was powered by the dynamical decay of a non-hierarchical system of massive stars. Results. Several sub-arcsecond H 2 features and many [Fe ] "fingertips" on the projected outskirts of the flow show proper motions of ∼300 km s −1 . High-velocity, sub-arcsecond H 2 knots ("bullets") are seen as far as 140 from their suspected ejection site. If these knots propagated through the dense Orion A cloud, their survival sets a lower bound on their densities of order 10 7 cm −3 , consistent with an origin within a few au of a massive star and accelerated by a final multi-body dynamic encounter that ejected the BN object and radio source I from OMC1 about 500 yr ago. Conclusions. Over 120 high-velocity bow-shocks propagating in nearly all directions from the OMC1 cloud core provide evidence for an explosive origin for the BN/KL outflow triggered by the dynamic decay of a non-hierarchical system of massive stars. Such events may be linked to the origin of runaway, massive stars.

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“…The Orion OMC1 explosion is not unique among starforming regions. Zapata et al (2013) found evidence for a powerful explosive outflow in the DR 21 complex in Cygnus. If such dynamic interactions are responsible for the large number of runaway O stars, and binaries among massive stars, the event rate of OMC1-like events ought to be comparable to the birth-rate of massive stars.…”

Section: Is Spirits 14ajc Powered By Amentioning

confidence: 96%

SPIRITS: Uncovering Unusual Infrared Transients with Spitzer

Kasliwal

Bally

Masci

et al. 2017

ApJ

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SPIRITS: Uncovering Unusual Infrared Transients with Spitzerhttp://researchonline.ljmu.ac.uk/6445/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Users may download and/or print one copy of any article(s) in LJMU Research Online to facilitate their private study or for non-commercial research. You may not engage in further distribution of the material or use it for any profit-making activities or any commercial gain.The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription.http://researchonline.ljmu.ac.uk/ Citation (please note it is advisable to refer to the publisher's version if you intend to cite from this work) Abstract We present an ongoing, five-year systematic search for extragalactic infrared transients, dubbed SPIRITS-SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer/IRAC, we searched 190 nearby galaxies with cadence baselines of one month and six months. We discovered over 1958 variables and 43 transients. Here, we describe the survey design and highlight 14 unusual infrared transients with no optical counterparts to deep limits, which we refer to as SPRITEs (eSPecially Red Intermediate-luminosity Transient Events). SPRITEs are in the infrared luminosity gap between novae and supernovae, with [4.5] absolute magnitudes between −11 and −14 (Vega-mag) and [3.6]-[4.5] colors between 0.3 mag and 1.6 mag. The photometric evolution of SPRITEs is diverse, ranging from <0.1 mag yr −1 to >7 mag yr −1 . SPRITEs occur in star-forming galaxies. We present an indepth study of one of them, SPIRITS 14ajc in Messier 83, which shows shock-excited molecular hydrogen emission. This shock may have been triggered by the dynamic decay of a non-hierarchical system of massive stars that led to either the formation of a binary or a protostellar merger. Kasliwal

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A 10,000 Year Old Explosion in Dr21

Cited by 36 publications

References 16 publications

Submillimeter Array High-Angular Resolution Observations of the Monoceros R2 Star-Forming Cluster

Submillimeter Array High-Angular Resolution Observations of the Monoceros R2 Star-Forming Cluster

The Orion fingers: Near-IR adaptive optics imaging of an explosive protostellar outflow

SPIRITS: Uncovering Unusual Infrared Transients with Spitzer

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