Emission nebula | |
---|---|
Herbig–Haro object | |
![]() Hubble
WFC3 image of HH 111 | |
Observation data: J2000.0 epoch | |
Right ascension | 05h 51m 44.2s [1] |
Declination | +02° 48′ 34″ [1] |
Distance | 1500 [2] ly |
Constellation | Orion [2] |
Designations | HH 111 |
HH 111 is a Herbig-Haro object in the L1617 dark cloud of the Orion B molecular cloud [2] in the constellation of Orion. It is a prototype of a highly collimated optical jet sources. It shows several bow shocks and has a length of about 2.6 light-years (0.8 parsec). [3]
HH 111 is about 1300 light years (400 parsec) distant from earth and the central source is IRAS 05491+0247, also called VLA 1. [2] This source is the driving source of the jets and it is a class I protostar with a luminosity of about 25 L☉. This protostar is embedded in a 30 M☉ cloud core. [4] The dynamical age of the complex is only 800 years. [4] Near the central source an ammonia feature called NH3-S was found, which is a starless core with a turbulent interior induced by HH 111. [2]
The jets move with a speed of 300 - 600 km/s and consist of a blueshifted component, which is bright in optical wavelengths and a redshifted faint counterjet. [4] A second pair of bipolar jets, called HH 121 was discovered in the near-infrared at an angle of 61 ° compared to the HH 111 pair. This was taken as evidence for a system with multiple protostars. [5] [6]
Emission nebula | |
---|---|
Herbig–Haro object | |
![]() Hubble
WFC3 image of HH 111 | |
Observation data: J2000.0 epoch | |
Right ascension | 05h 51m 44.2s [1] |
Declination | +02° 48′ 34″ [1] |
Distance | 1500 [2] ly |
Constellation | Orion [2] |
Designations | HH 111 |
HH 111 is a Herbig-Haro object in the L1617 dark cloud of the Orion B molecular cloud [2] in the constellation of Orion. It is a prototype of a highly collimated optical jet sources. It shows several bow shocks and has a length of about 2.6 light-years (0.8 parsec). [3]
HH 111 is about 1300 light years (400 parsec) distant from earth and the central source is IRAS 05491+0247, also called VLA 1. [2] This source is the driving source of the jets and it is a class I protostar with a luminosity of about 25 L☉. This protostar is embedded in a 30 M☉ cloud core. [4] The dynamical age of the complex is only 800 years. [4] Near the central source an ammonia feature called NH3-S was found, which is a starless core with a turbulent interior induced by HH 111. [2]
The jets move with a speed of 300 - 600 km/s and consist of a blueshifted component, which is bright in optical wavelengths and a redshifted faint counterjet. [4] A second pair of bipolar jets, called HH 121 was discovered in the near-infrared at an angle of 61 ° compared to the HH 111 pair. This was taken as evidence for a system with multiple protostars. [5] [6]