Near-infrared imaging of the Herbig-Haro object HH124

Piche, Francois; Howard, Eric M.; Pipher, J. L.

doi:10.1093/mnras/275.3.711

Cited by 8 publications

(10 citation statements)

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“…Unlike VLA 1, VLA 2 has no point‐source near‐infrared counterpart. It lies in a concavity seen at the north‐east end of the infrared reflection nebulosity reported by Piché et al (1995). The slightly fainter SCUBA peak to the south‐east of 25 S1 (25 S2) is not associated with any known near‐infrared or radio continuum source.…”

Section: Resultsmentioning

confidence: 70%

“…Identified as IRAS 06382+1017 upon publication of the Point Source Catalogue, it lies at the southern end of an extended, massive (500–700 M ⊙ ) clump traced by CS J = 2 → 1 emission (WWL95). It has been associated with a compact CO outflow, NGC 2264 O (WWL95; WW95); a giant Herbig–Haro flow, HH124, and its bow‐shock pairs, HH124‐E and HH124‐W; an infrared reflection nebula; and a near‐infrared source (Walsh, Ogura & Reipurth 1992; Moneti & Reipurth 1995; Ogura 1995; Piché, Howard & Pipher 1995). The near‐infrared source is a barely resolved binary, with the secondary component located ∼1.75 arcsec (∼1400 au) from the primary at a PA ≈ 155°.…”

Section: Resultsmentioning

confidence: 99%

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Star formation in massive protoclusters in the Monoceros OB1 dark cloud

Wolf-Chase¹,

Moriarty‐Schieven²,

Fich³

et al. 2003

Monthly Notices RAS

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We present far‐infrared, submillimetre and millimetre observations of bright IRAS sources and outflows that are associated with massive CS clumps in the Monoceros OB1 dark cloud. Individual star‐forming cores are identified within each clump. We show that combining submillimetre maps, obtained with SCUBA on the James Clerk Maxwell Telescope, with HIRES‐processed and modelled IRAS data is a powerful technique that can be used to place better limits on individual source contributions to the far‐infrared flux in clustered regions. Three previously categorized ‘Class I objects’ are shown to consist of multiple sources in different evolutionary stages. In each case, the IRAS point source dominates the flux at 12 and 25 μm. In two cases, the IRAS point source is not evident at submillimetre wavelengths. The submillimetre sources contribute significantly to the 60‐ and 100‐μm fluxes, dominating the flux in the 100‐μm waveband. Using fluxes derived from our technique, we present the spectral energy distribution and physical parameters for an intermediate‐mass Class 0 object in one of the regions. Our new CO J= 2 → 1 outflow maps of the three regions studied indicate complex morphology suggestive of multiple driving sources. We discuss the possible implications of our results for published correlations between outflow momentum deposition rates and ‘source’ luminosities, and for using these derived properties to estimate the ratio of mass ejection rates to mass accretion rates on to protostars.

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Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Star formation in massive protoclusters in the Monoceros OB1 dark cloud

Wolf-Chase¹,

Moriarty‐Schieven²,

Fich³

et al. 2003

Monthly Notices RAS

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“…Three VLA sources, numbers 1, 2, and 9, are very close to the IRAS source, which is therefore likely to represent a mixture of far-infrared radiation from some or perhaps all these three sources. VLA 1 corresponds to a nebulous red binary found by Piché et al (1995). Wolf-Chase et al (2003) present submillimeter observations of the region and find at least two cool sources, S1, which is 15 00 from VLA 1, and S2, which is 7 00 from VLA 2.…”

Section: Infrared Imagingmentioning

confidence: 77%

“…Flow A obviously coincides with the HH 124 flow, but is much more symmetric in the infrared. Piché et al (1995) already studied this flow in molecular hydrogen. The center of the uncertainty ellipse for the IRAS 06382+1017 source is right between the two symmetric outflow lobes.…”

Section: Infrared Imagingmentioning

confidence: 99%

Deep Imaging Surveys of Star-forming Clouds. I. New Herbig-Haro Flows in NGC 2264

Reipurth

Moriarty‐Schieven

et al. 2004

Astron J

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We have embarked on a major, imaging survey of nearby star-forming regions using wide-field imaging detectors to identify and characterize the full population of Herbig-Haro flows from newborn stars in each region. In this study we present our survey results for the NGC 2264 region in Monoceros, where we have found a number of new Herbig-Haro objects, HH 571-HH 585, including several giant, parsec-scale flows. We discuss the individual flows and attempt to locate their region of origin. In particular, we identify two quadrupolar HH flows emanating from two cloud cores and associated with major molecular outflows. We also draw attention to what appears to be a region of major blowout of gas from a cloud core rich in young stars.

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“…FS Tau Aa and Ab were discovered by Simon et al (1992), and the 1. 82 companion to IRAS 06382+1071 was discovered by Piché et al (1995).…”

Section: Resultsmentioning

confidence: 99%

An Adaptive Optics Survey for Close Protostellar Binaries

Connelley

Reipurth

Tokunaga

2009

The Astronomical Journal

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In order to test the hypothesis that Class I protostellar binary stars are a product of ejections during the dynamical decay of nonhierarchical multiple systems, we combined the results of new adaptive optics (AO) observations of Class I protostars with our previously published AO data to investigate whether Class I protostars with a widely separated companion (r > 200 AU) are more likely to also have a close companion (r < 200 AU). In total, we observed 47 embedded young stellar objects (YSOs) with either the Subaru natural guide star AO system or the Keck laser guide star AO system. We found that targets with a widely separated companion within 5000 AU are not more likely to have a close companion. However, targets with another YSO within a projected separation of 25,000 AU are much more likely to have a close companion. Most importantly, every target with a close companion has another YSO within a projected separation of 25,000 AU. We came to the same conclusions after considering a restricted sample of targets within 500 pc and close companions wider than 50 AU to minimize incompleteness effects. The Orion star-forming region was found to have an excess of both close binaries and YSOs within 25,000 AU compared to other star-forming regions. We interpret these observations as strong evidence that many close Class I binary stars form via ejections and that many of the ejected stars become unbound during the Class I phase.

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Near-infrared imaging of the Herbig-Haro object HH124

Cited by 8 publications

References 0 publications

Star formation in massive protoclusters in the Monoceros OB1 dark cloud

Star formation in massive protoclusters in the Monoceros OB1 dark cloud

Deep Imaging Surveys of Star-forming Clouds. I. New Herbig-Haro Flows in NGC 2264

An Adaptive Optics Survey for Close Protostellar Binaries

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