New H<sub>2</sub> Jets in Monoceros R2

Hodapp, Klaus W.

doi:10.1086/522784

Cited by 10 publications

(13 citation statements)

References 43 publications

(86 reference statements)

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“…Although their efficiency to accelerate cosmic rays should be modest, their global contribution might help to enhance the relativistic particle population inside Mon R2. We note here that a few tens of thermal jets from low-mass stars are actually visible in H 2 infrared images (Hodapp 2007) inside the Fermi LAT ellipse.…”

Section: Runaway Starsmentioning

confidence: 62%

The star forming region Monoceros R2 as a gamma-ray source

Martı́

Luque-Escamilla

Muñoz‐Arjonilla

et al. 2013

A&A

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Context. After the release of the gamma-ray source catalog produced by the Fermi satellite during its first two years of operation, a significant fraction of sources still remain unassociated at lower energies. In addition to well-known high-energy emitters (pulsars, blazars, supernova remnants, etc.), theoretical expectations predict new classes of gamma-ray sources. In particular, gamma-ray emission could be associated with some of the early phases of stellar evolution, but this interesting possibility is still poorly understood. Aims. The aim of this paper is to assess the possibility of the Fermi gamma-ray source 2FGL J0607.5−0618c being associated with the massive star forming region Monoceros R2. Methods. A multi-wavelength analysis of the Monoceros R2 region is carried out using archival data at radio, infrared, X-ray, and gamma-ray wavelengths. The resulting observational properties are used to estimate the physical parameters needed to test the different physical scenarios. Results. We confirm the 2FGL J0607.5−0618c detection with improved confidence over the Fermi two-year catalog. We find that a combined effect of the multiple young stellar objects in Monoceros R2 is a viable picture for the nature of the source.

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Section: Runaway Starsmentioning

confidence: 62%

The star forming region Monoceros R2 as a gamma-ray source

Martı́

Luque-Escamilla

Muñoz‐Arjonilla

et al. 2013

A&A

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“…Previous near-IR observations carried out by Hodapp (2007) toward the MonR2 star cluster reported a population of H 2 jets surrounding the MonR2 clump center. From this, Carpenter & Hodapp (2008) proposed that the observed distribution of H 2 2.12 µm outflows was consistent with a scenario where star formation had been triggered by the interaction of the large-scale CO outflow with the surrounding ambient cloud.…”

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

confidence: 88%

“…By using near-IR 2.12 µm H 2 observations, Hodapp (2007) reported the detection of 15 new H 2 jets in the MonR2 cluster that are likely associated with young Class 0 and I sources at their main accretion phase. These jets were mainly found toward the edges of the MonR2 molecular cloud, which was interpreted as a signature of triggered star formation (Hodapp 2007;Carpenter & Hodapp 2008).…”

Section: Introductionmentioning

confidence: 99%

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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“…Collectively, jets and outflows can be used as sign‐posts of star formation (e.g. Bally et al 1995; Eislöffel 2000; Froebrich & Scholz 2003; Hodapp 2007; Hatchell, Fuller & Richer 2007; Davis et al 2009; Walawender et al 2009). An abundance of jets points to active accretion and a young population; a paucity of flows, in a region where near‐ and mid‐IR photometry still point to a sizeable population of reddened sources, indicates a more evolved region with a larger population of pre‐main‐sequence stars (T‐Tauri and Herbig Ae/Be stars).…”

Section: Discussionmentioning

confidence: 99%

UWISH2 - the UKIRT Widefield Infrared Survey for H2

Froebrich¹,

Davis²,

Ioannidis³

et al. 2011

Monthly Notices of the Royal Astronomical Society

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We present the goals and preliminary results of an unbiased, near-infrared, narrow-band imaging survey of the first galactic quadrant (10 • < l < 65 • ; −1. • 3 < b < +1. • 3). This area includes most of the giant molecular clouds and massive star forming regions in the Northern hemisphere. The survey is centred on the 1-0 S(1) rovibrational line of H 2 , a proven tracer of hot, dense molecular gas in star-forming regions, around evolved stars, and in supernova remnants. The observations complement existing and upcoming photometric surveys (Spitzer-GLIMPSE, UKIDSS-GPS, JCMT-JPS, AKARI, Herschel Hi-GAL, etc.), though we probe a dynamically active component of star formation not covered by these broad-band surveys. Our narrow-band survey is currently more than 60 per cent complete. The median seeing in our images is 0.73 arcsec. The images have a 5σ detection limit of point sources of K ∼ 18 mag and the surface brightness limit is 10 −19 W m −2 arcsec −2 when averaged over our typical seeing. Jets and outflows from both low-and high-mass young stellar objects are revealed, as are new planetary nebulae and -via a comparison with earlier K-band observations acquired as a part of the UKIDSS GPS -numerous variable stars. With their superior spatial resolution, the UWISH2 data also have the potential to reveal the true nature of many of the extended green objects found in the GLIMPSE survey.

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New H₂ Jets in Monoceros R2

Cited by 10 publications

References 43 publications

The star forming region Monoceros R2 as a gamma-ray source

The star forming region Monoceros R2 as a gamma-ray source

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

UWISH2 - the UKIRT Widefield Infrared Survey for H2

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New H2 Jets in Monoceros R2

Cited by 10 publications

References 43 publications

The star forming region Monoceros R2 as a gamma-ray source

The star forming region Monoceros R2 as a gamma-ray source

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

UWISH2 - the UKIRT Widefield Infrared Survey for H2

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Product

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New H₂ Jets in Monoceros R2