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Melikian, N. D.; Karapetian, A. A.

doi:10.1023/a:1010996726106

Cited by 14 publications

(16 citation statements)

References 2 publications

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“…In the center of this field lies RNO 127 (Cohen 1980), around which we investigated a wide area (∼14 square arcmin). This object is also known as HH 448 1 (Melikian & Karapetian 2001). Nearby, we have found a striking variable cometary nebula and several other Herbig-Haro objects.…”

Section: Introductionsupporting

confidence: 54%

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An optical and near-infrared exploration of the star formation region in Cygnus surrounding RNO 127

Movsessian

Khanzadyan

Magakian

et al. 2003

A&A

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Abstract. We investigate a relatively unstudied star formation region in Cygnus centered on RNO 127, finding numerous Herbig-Haro flows, many identified in optical [SII], Hα, and near-infrared H 2 tracers of shock waves. Several protostars and young stars are thus located, including one conspicuously brightened object, which illuminates a variable reflection nebula. In total, the coordinates of 17 optical HH knots and jets, 4 associated cometary nebulae and 3 NIR objects are given. Individual structures are discussed including a central complex which has the characteristics of superposed HH flows. This star-forming cloud is not isolated but is part of a much larger region of distributed star formation, including HH 380 and HH 381.

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Section: Introductionsupporting

confidence: 54%

“…HH 380 1 The name HH 448 was reserved by N. Melikian for a new HH-like object, which is identical to RNO 127, but was not used in their article (Melikian & Karapetian 2001) (from priv. comm.…”

Section: Introductionmentioning

confidence: 99%

An optical and near-infrared exploration of the star formation region in Cygnus surrounding RNO 127

Movsessian

Khanzadyan

Magakian

et al. 2003

A&A

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“…The first study of the LDN 1003 molecular cloud dates back to the discovery of a red nebulous object RNO 127 by Cohen (1980) which eventually turned out to be a Herbig-Haro (HH 448) object (Melikian & Karapetian 2001). Later studies of the region uncovered numerous Hα stars (Melikian & Karapetian 2001), optical and near-infrared HH objects and reflection nebulae (Movsessian et al 2003), one of which -the Braid Nebula -was found to be associated with an FU Orionis (FU Ori) type eruptive variable star (Movsessian et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Later studies of the region uncovered numerous Hα stars (Melikian & Karapetian 2001), optical and near-infrared HH objects and reflection nebulae (Movsessian et al 2003), one of which -the Braid Nebula -was found to be associated with an FU Orionis (FU Ori) type eruptive variable star (Movsessian et al 2006). Some 30 west of RNO 127, Devine et al (1997) found several HH objects, two of which were associated with the bipolar reflection nebula created by HH 381 IRS (IRAS 20568+5217).…”

Section: Introductionmentioning

confidence: 99%

A wide-field near-infrared H₂2.122μm line survey of the Braid Nebula star formation region in Cygnus OB7

Khanzadyan

Davis

Aspin

et al. 2012

A&A

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Context. Outflows and jets are the first signposts of ongoing star formation processes in any molecular cloud, yet their study in optical bands provides limited results due to the large extinction present. Near-infrared unbiased wide-field observations in the H 2 1−0 S(1) line at 2.122 µm alleviates the problem, enabling us to detect more outflows and trace them closer to their driving sources. Aims. As part of a large-scale multi-waveband study of ongoing star formation in the Braid Nebula star formation region, we focus on a one square degree region that includes Lynds Dark Nebula 1003 and 1004. Our goal is to find all of the near-infrared outflows, uncover their driving sources and estimate their evolutionary phase. Methods. We use near-infrared wide-field observations obtained with WFCAM on UKIRT, in conjunction with previously-published optical and archival MM data, to search for outflows and identify their driving sources; we subsequently use colour−colour analysis to determine the evolutionary phase of each source. Results. Within a one square degree field we have identified 37 complex MHOs, most of which are new. After combining our findings with other wide-field, multi-waveband observations of the same region we were able to discern 28 outflows and at least 18 protostars. Our analysis suggests that these protostars are younger and/or more energetic than those of the Taurus-Auriga region. The outflow data enable us to suggest connection between outflow ejection and repetitive FU Ori outburst events. We also find that star formation progresses from W to E across the investigated region.

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“…The dark cloud of interest here is LDN 1003 and was first investigated in the optical by Cohen (1980) who, while cataloging red nebulous objects, found it to contain a diffuse nebula which he designated RNO 127. Some time later, it was determined that RNO 127 was a bright Herbig-Haro (HH) object (HH 448;Melikian & Karapetian 2001, 2003. Both Devine et al (1997) and Movsessian et al (2003, henceforth M03) studied this region further and presented optical and near-IR (NIR) observations.…”

Section: Introductionmentioning

confidence: 99%

CSO BOLOCAM 1.1 mm CONTINUUM MAPPING OF THE BRAID NEBULA STAR FORMATION REGION IN CYGNUS OB7

Aspin

Beck

Davis

et al. 2011

The Astronomical Journal

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We present a 1.1 mm map of the Braid Nebula star formation region in Cygnus OB7 taken using Bolocam on the Caltech Submillimeter Observatory. Within the 1 deg 2 covered by the map, we have detected 55 cold dust clumps all of which are new detections. A number of these clumps are coincident with IRAS point sources although the majority are not. Some of the previously studied optical/near-IR sources are detected at 1.1 mm. We estimate total dust/gas masses for the 55 clumps together with peak visual extinctions. We conclude that over the whole region, approximately 20% of the clumps are associated with IRAS sources suggesting that these are protostellar objects. The remaining 80% are classed as starless clumps. In addition, both FU Orionis (FUor) like objects in the field, the Braid Star and HH 381 IRS, are associated with strong millimeter emission. This implies that FUor eruptions can occur at very early stages of pre-main-sequence life. Finally, we determine that the cumulative clump mass function for the region is very similar to that found in both the Perseus and ρ Ophiuchus star-forming regions.

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Cited by 14 publications

References 2 publications

An optical and near-infrared exploration of the star formation region in Cygnus surrounding RNO 127

An optical and near-infrared exploration of the star formation region in Cygnus surrounding RNO 127

A wide-field near-infrared H₂2.122μm line survey of the Braid Nebula star formation region in Cygnus OB7

CSO BOLOCAM 1.1 mm CONTINUUM MAPPING OF THE BRAID NEBULA STAR FORMATION REGION IN CYGNUS OB7

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Untitled

Cited by 14 publications

References 2 publications

An optical and near-infrared exploration of the star formation region in Cygnus surrounding RNO 127

An optical and near-infrared exploration of the star formation region in Cygnus surrounding RNO 127

A wide-field near-infrared H22.122μm line survey of the Braid Nebula star formation region in Cygnus OB7

CSO BOLOCAM 1.1 mm CONTINUUM MAPPING OF THE BRAID NEBULA STAR FORMATION REGION IN CYGNUS OB7

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A wide-field near-infrared H₂2.122μm line survey of the Braid Nebula star formation region in Cygnus OB7