UKIRT Widefield Infrared Survey for Fe+

Lee, Jae‐Joon; Koo, Bon‐Chul; Lee, Yong-Hyun; Lee, Ho-Gyu; Shinn, Jong-Ho; Kim, Hyun-Jeong; Kim, Yesol; Pyo, Tae‐Soo; Yoon, Sung‐Chul; Chun, Moo-Young; Froebrich, D.; Davis, C. J.; Varricatt, W. P.; Kyeong, Jaemann; Hwang, Narae; Park, Byeong-Gon; Lee, Myung Gyoon; Lee, Hyung Mok; Ishiguro, Masateru

doi:10.1093/mnras/stu1146

Cited by 17 publications

(19 citation statements)

References 91 publications

(102 reference statements)

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“…The overall morphology of the H 2 feature resembles the bipolar outflows of Herbig Haro objects. The outflow nature of the observed H 2 feature is further supported by recent detection of [Fe II] emission coinciding with the southwest part (see Figure 12 of Lee et al 2014). The inner ∼0.4 pc part of the H 2 outflow has a position angle of ∼18 • , which coincides with the reflection nebula reported by Jones et al (2004) (see their Figure 5).…”

Section: Multi-wavelength View Around 67-ghz Mmesupporting

confidence: 76%

Massive Young Stellar Object W42-Mme: The Discovery of an Infrared Jet Using VLT/Naco Near-Infrared Images

Dewangan

Mayya

Luna

et al. 2015

ApJ

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We report on the discovery of an infrared jet from a deeply embedded infrared counterpart of 6.7-GHz methanol maser emission (MME) in W42 (i.e. W42-MME). We also investigate that W42-MME drives a parsec-scale H 2 outflow, with detection of bow shock feature at ∼0.52 pc to the north. The inner ∼0.4 pc part of the H 2 outflow has a position angle of ∼18 • and the position angle of ∼40 • is found farther away on either side of outflow from W42-MME. W42-MME is detected at wavelengths longer than 2.2 µm and is a massive young stellar object, with the estimated stellar mass of 19±4 M . We map the inner circumstellar environment of W42-MME using VLT/NACO adaptive optics K s and L observations at resolutions ∼0. 2 and ∼0. 1, respectively. We discover a collimated jet in the inner 4500 AU using the L band, which contains prominent Brα line emission. The jet is located inside an envelope/cavity (extent ∼10640 AU) that is tapered at both ends and is oriented along the north-south direction. Such observed morphology of outflow cavity around massive star is scarcely known and is very crucial for understanding the jet-outflow formation process in massive star formation. Along the flow axis, which is parallel to the previously known magnetic field, two blobs are found in both the NACO images at distances of ∼11800 AU, located symmetrically from W42-MME. The observed W42-MME jet-outflow configuration can be used to constrain the jet launching and jet collimation models in massive star formation. Subject headings: ISM: jets and outflows -ISM: HII regions -ISM: magnetic fields -ISM: individual objects (W42-MME) -stars: formation

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Section: Multi-wavelength View Around 67-ghz Mmesupporting

confidence: 76%

Massive Young Stellar Object W42-Mme: The Discovery of an Infrared Jet Using VLT/Naco Near-Infrared Images

Dewangan

Mayya

Luna

et al. 2015

ApJ

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“…For the entire area we also have broad-band JHK data from the UKIDSS (Lawrence et al 2007) Galactic Plane Survey (Lucas et al 2008). The K-band images have been utilised to continuum subtract the H2 images following the procedures described in Lee et al (2014).…”

Section: Uwish2 Datamentioning

confidence: 99%

YSO jets in the Galactic plane from UWISH2 – III. Jets and outflows in Cassiopeia and Auriga

Froebrich

Makin

2016

Mon. Not. R. Astron. Soc.

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We present the analysis of 35.5 square degrees of images in the 1 -0 S(1) line of H 2 from the UK Widefield Infrared Survey for H 2 (UWISH2) towards Cassiopeia and Auriga. We have identified 98 Molecular Hydrogen emission-line Objects (MHOs) driven by Young Stellar Objects, 60 % of which are bipolar outflows and all are new discoveries. We estimate that the UWISH2 extended emission object catalogue contains fewer than 2 % false positives and is complete at the 95 % level for jets and outflows brighter than the UWISH2 detection limit. We identified reliable driving source candidates for three quarters of the detected outflows, 40 % of which are associated with groups and clusters of stars. The driving source candidates are 20 % protostars, the remainder are CTTSs. We also identified 15 new star cluster candidates near MHOs in the survey area.We find that the typical outflow identified in the sample has the following characteristics: the position angles are randomly orientated; bipolar outflows are straight within a few degrees; the two lobes are slightly asymmetrical in length and brightness; the length and brightness of the lobes are not correlated; typical time gaps between major ejections of material are 1 -3 kyr, hence FU-Ori or EX-Ori eruptions are most likely not the cause of these, but we suggest MNors as a possible source. Furthermore, we find that outflow lobe length distributions are statistically different from the widely used total length distributions. There are a larger than expected number of bright outflows indicating that the flux distribution does not follow a power law.

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“…We also used the [Fe II] images obtained from the UKIRT Widefield Infrared Survey for Fe + (UWIFE; Lee et al 2014) to search for [Fe II] emission associated with the H 2 outflow. UWIFE was designed to complement UWISH2 so that it covers the same area with the same instrument as UWISH2 but using the [Fe II] 1.644 µm narrow filter.…”

Section: Ukirt/wfcam Wide-field Imagesmentioning

confidence: 99%

“…During the observations, we obtained the H-band images as well for continuum subtraction considering possible variations of continuum emission between 2006 (from UKIDSS GPS) and 2012. Details on the UWISH2 and UWIFE surveys are presented in Froebrich et al (2011) and Lee et al (2014), respectively.…”

Section: Ukirt/wfcam Wide-field Imagesmentioning

confidence: 99%

“…Then, we performed point-spread-function (PSF) photometry of each image and removed detected point sources; we finally subtracted the point-source-removed broad-band image from the point-sourceremoved narrow-band image to remove other extended continuum sources. The above method was developed as a part of the UWIFE data reduction process, and more detailed explanations are given in Lee et al (2014).…”

Section: Ukirt/wfcam Wide-field Imagesmentioning

confidence: 99%

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A Parsec-scale Bipolar H₂ Outflow in the Massive Star-forming Infrared Dark Cloud Core MSXDC G053.11+00.05 MM1* ^†

Kim

Koo

Pyo

et al. 2018

ApJ

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We present a parsec-scale molecular hydrogen (H 2 1-0 S(1) at 2.12 µm) outflow discovered from the UKIRT Widefield Infrared Survey for H 2 . The outflow is located in the infrared dark cloud core MSXDC G053.11+00.05 MM1 at 1.7 kpc and likely associated with two young stellar objects (YSOs) at the center. The overall morphology of the outflow is bipolar along the NE-SW direction with a brighter lobe to the southwest, but the detailed structure consists of several flows and knots. With the total length of ∼1 pc, the outflow luminosity is fairly high with L H 2 > 6 L ⊙ , implying a massive outflow-driving YSO if the entire outflow is driven by a single source. The two putative driving sources, located at the outflow center, show photometric variability of 1 mag in H-and K-bands. This, with their early evolutionary stage from spectral energy distribution (SED) fitting, indicates that both are capable of ejecting outflows and may be eruptive variable YSOs. The YSO masses inferred from SED fitting are ∼10 M ⊙ and ∼5 M ⊙ , suggesting the association of the outflow with massive YSOs. The geometrical morphology of the outflow is well explained by the lower mass YSO by assuming a single source origin, but without kinematic information, the contribution from the higher mass YSO cannot be ruled out. Considering star formation process by fragmentation of a high-mass core into several lower mass stars, we also suggest the possible presence of another, yet-undetected driving source deeply embedded in the core.

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UKIRT Widefield Infrared Survey for Fe+

Cited by 17 publications

References 91 publications

Massive Young Stellar Object W42-Mme: The Discovery of an Infrared Jet Using VLT/Naco Near-Infrared Images

Massive Young Stellar Object W42-Mme: The Discovery of an Infrared Jet Using VLT/Naco Near-Infrared Images

YSO jets in the Galactic plane from UWISH2 – III. Jets and outflows in Cassiopeia and Auriga

A Parsec-scale Bipolar H₂ Outflow in the Massive Star-forming Infrared Dark Cloud Core MSXDC G053.11+00.05 MM1* ^†

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UKIRT Widefield Infrared Survey for Fe+

Cited by 17 publications

References 91 publications

Massive Young Stellar Object W42-Mme: The Discovery of an Infrared Jet Using VLT/Naco Near-Infrared Images

Massive Young Stellar Object W42-Mme: The Discovery of an Infrared Jet Using VLT/Naco Near-Infrared Images

YSO jets in the Galactic plane from UWISH2 – III. Jets and outflows in Cassiopeia and Auriga

A Parsec-scale Bipolar H2 Outflow in the Massive Star-forming Infrared Dark Cloud Core MSXDC G053.11+00.05 MM1* †

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A Parsec-scale Bipolar H₂ Outflow in the Massive Star-forming Infrared Dark Cloud Core MSXDC G053.11+00.05 MM1* ^†