New Herbig-Haro objects

Gyulbudaghian, A. L.; Glushkov, Yu. I.; Denisyuk, Eh. K.

doi:10.1086/182777

Cited by 80 publications

(59 citation statements)

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“…The optical nebula list was compiled from: Ber (Bernes 1977), BFS (Blitz et al 1982), BRC (Sugitani et al 1991), Ced (Cederblad 1946), DG (von Dorschner & Gurtler 1963), GGD (Gyulbudaghian et al 1978), GM1- (Gyulbudaghian & Maghakian 1977a), GM2- (Gyulbudaghian & Maghakian 1977b), GM3- (Gyulbudaghian & Maghakian 1977c), Gy1- (Gyulbudaghian 1982a), Gy2- (Gyulbudaghian 1984a), Gy3- (Gyulbudaghian 1984b), Gy82- (Gyulbudaghian 1982b), NS (Neckel & Staude 1984), Parsamian (Parsamian 1965), PP (Parsamian & Petrosian 1979), RNO (Cohen 1980), Sh1- (Sharpless 1953), Sh2- (Sharpless 1959) andvdB-RN (van de Bergh 1966).…”

Section: Search Methodsmentioning

confidence: 99%

New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS

Bica

Dutra

Soares

et al. 2003

A&A

202

216

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Abstract. We carried out a survey of infrared star clusters and stellar groups on the 2MASS J, H and K s all-sky release Atlas in the Northern and Equatorial Milky Way (350The search in this zone complements that in the Southern Milky Way (Dutra et al. 2003a). The method concentrates efforts on the directions of known optical and radio nebulae. The present study provides 167 new infrared clusters, stellar groups and candidates. Combining the two studies for the whole Milky Way, 346 infrared clusters, stellar groups and candidates were discovered, whereas 315 objects were previously known. They constitute an important new sample for future detailed studies.

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Section: Search Methodsmentioning

confidence: 99%

New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS

Bica

Dutra

Soares

et al. 2003

A&A

202

216

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“…The HH 80-81 system, also known as GGD 27 (Gyulbudaghian, Glushkov, & Denisyuk 1978), consists of a highly collimated radio jet that powers an outflow with a total projected extent of 5.3 pc at an adopted distance of 1.7 kpc (Rodríguez et al 1980;Martí, Rodríguez, & Reipurth 1993. The thermal radio jet associated with HH 80-81 terminates to the south in the extremely bright optical HH objects 80 and 81 (Reipurth & Graham 1988;Martí et al 1993Martí et al , 1995Heathcote, Reipurth, & Raga 1998) and to the north in the radio source HH 80 North (Martí et al 1993;Girart et al 1994Girart et al , 2001).…”

Section: Introductionmentioning

confidence: 99%

VLA and BIMA Observations toward the Exciting Source of the Massive HH 80–81 Outflow

Gómez¹,

Rodrı́guez²,

Girart

et al. 2003

ApJ

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We present high angular resolution Very Large Array (VLA) and Berkeley-Illinois-Maryland Association (BIMA) observations of NH 3 , HCO + , HCN, and SO molecular emission and 1.4, 3.5, and 7 mm continuum emission toward the exciting source of the HH 80-81 system. This object is one of the few massive protostars known to be driving a collimated outflow. We report the first detection of SO 5 5 -4 4 molecular emission toward the exciting source of HH 80-81, suggesting that this transition may be a good tracer of molecular gas near massive protostars. We also detected toward this source dust continuum emission at 1.4 and 3.5 mm. From the SO molecular emission and the dust emission we roughly estimated that the molecular mass associated with the circumstellar surroundings of the exciting source of the thermal jet is in the range 1-3 M . Weak and broad (2, 2) ammonia emission was also found in the direction of the jet, suggesting the presence of small amounts of molecular gas at high temperatures (>50 K). The VLA observations show the presence of three ammonia components toward the HH 80-81 region. The brightest component peaks at $8 00 northeast of the thermal jet and is associated with the H 2 O maser spots in the region. A second ammonia clump is located about 25 00 northeast of the jet and is associated with Class I methanol masers. The third ammonia component is located 1 0 south of the thermal jet and may be a molecular core, yet without stellar formation. The BIMA observations show that the strongest emission in the HCO + and HCN lines originates close to the H 2 O maser and covers the same spatial region and velocity range as the brightest ammonia component.

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“…X-Ray Sources Associated with Two Other VLA Sources GGD 27 and GGD 28 were originally suggested as HH objects (Gyulgudaghian, Glushkov, & Denisyuk 1978) but are not, since they have no nebular H emission (HL85). CXOPTM J181910.4À204657 is coincident (<1 00 ) with the GGD 27 object HL 41 = MRR 12 = IRS 4.…”

Section: X-ray Sources Near the Central Power Sourcementioning

confidence: 99%

X‐Rays from HH 80, HH 81, and the Central Region

Pravdo

Tsuboi

Maeda

2004

ApJ

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We report detections of X-rays from HH 80 and HH 81 with the ACIS instrument on the Chandra X-Ray Observatory. These are among the most luminous Herbig-Haro (HH) sources in the optical, and they are now the most luminous known in X-rays. These X-rays arise from the strong shocks that occur when the southern extension of this bipolar outflow slams into the ambient material. There is a one-to-one correspondence between regions of high X-ray emission and high H emission. The X-ray luminosities of HH 80 and HH 81 are 4.5 and 4:3 ; 10 31 ergs s À1 , respectively, assuming that the measured low-energy absorption is not in the sources. The measured temperature of the HH plasma is not as large as that expected from the maximum velocities seen in the extended tails of the optical emission lines. Rather, it is consistent with the $10 6 K temperature of the ''narrow'' core of the optical lines. There is no observed emission from HH 80 North, the northern extension of the bipolar flow, based on a measurement of lower sensitivity. We imaged the central region of the bipolar flow revealing a complex of X-ray sources, including one near but not coincident with the putative power source in the radio and infrared. This source, CXOPTM J181912.4À204733, has no counterparts at other wavelengths and is consistent in luminosity and spectrum with a massive star with A V $ 90 mag. It may contribute significantly to the power input to the complex. Alternatively, this emission might be extended X-rays from outflows close to the power source. We detect 94 X-ray sources overall in this area of star formation.

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New Herbig-Haro objects

Cited by 80 publications

References 0 publications

New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS

New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS

VLA and BIMA Observations toward the Exciting Source of the Massive HH 80–81 Outflow

X‐Rays from HH 80, HH 81, and the Central Region

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