LMC N79
Nebula in the Large Magellanic Cloud
From Wikipedia, the free encyclopedia
LMC N79 (or LHα 120-N79) is an emission nebula in the Large Magellanic Cloud. The nebula is part of the catalog of H-alpha stars and nebulae by Karl G. Henize, published in 1956. It is composed of the smaller nebulae N79A to N79E[1] From a CO survey it was however seen that the nebula is larger and contains N79-S, N79-W and N79-E.[2] These nebulae were described by Henize with other names, with N79-S being the original N79 nebula, N79-W being N77 and N79-E being N83.[1]
| Henize | Ochsendorf+ | NGC nebula | NGC star cluster | IC objects |
|---|---|---|---|---|
| N79 | N79-S | NGC 1722 | NGC 1727, NGC 1712 | IC 2111 |
| N77 | N79-W | NGC 1698 | IC 2105 | |
| N83 | N79-E | NGC 1737 | NGC 1743, NGC 1745, NGC 1748 | IC 2114 |
| Emission nebula | |
|---|---|
| star-forming region | |
LMC N79 with the Spitzer Space Telescope. The nebula in the center is N79-S, containing a super star cluster | |
| Observation data: J2000 epoch | |
| Right ascension | 04h 52m 00.0s |
| Declination | −69° 22′ 30″ |
| Apparent dimensions (V) | 1038" x 814"[1] |
| Constellation | Dorado |
| Designations | LHA 120-N 79, DEM L 10, DEM L 6 |
Super star cluster
The central nebula N79-S contains the super star cluster (SSC) H72.97-69.39, also called HSO BMHERICC J072.9711-69.3911. This SSC was first suspected to exist in N79 in 2017 from Spitzer and Herschel observations.[2] The SSC was observed with ALMA. This showed that the SSC is at the center of two colliding filaments. ALMA also showed bipolar outflows that are 65,000 years old and a HII region associated with the SSC.[3] The stellar content was first studied with Gemini in 2021. At that time it was estimated that the SSC contains stars with a mass between 10,000 and 100,000 M☉.[4] Observations with JWST confirmed H72.97-69.39 as a SSC. Researchers discovered five massive stars in the center of the SSC with masses ranging between 20 and 40 M☉. The youngest massive young stellar objects (YSOs) of H72.97-69.39 is called Y3 and is 10,000 years old. The central ionizing source is Y4, which is the most massive of the YSOs with a mass of around 40 M☉. With MIRI the researchers identified 102 embedded YSOs in total.[5][6] Yet to be published work with NIRCam detected 1550 young stars in N79.[7]
Gallery
N79-S in mid-infrared with JWST. The bright object in the upper half contains the five most massive YSOs of the super star cluster.
N79-S in near-infrared with JWST. The super star cluster is on the right (which overlaps with the HII-region NGC 1722). On the left is the star cluster NGC 1727.
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See also
- List of most massive stars
- NGC 2070 with central condensation R136 is another SSC in the Large Magellanic Cloud
Milky Way SSCs: