HH 24-26

HH 24-26 is a molecular cloud and star-forming region containing the Herbig-Haro objects HH 24, HH 25 and HH 26. This region contains the highest concentration of astrophysical jets known anywhere in the sky.[2] The molecular cloud is located about 1400 light-years away in the L1630 dark cloud, which is part of the Orion B molecular cloud in the constellation of Orion.[3][4]

HH 24-26
Molecular cloud
Herbig-Haro object
HH 24 (top), HH 25 (below the blue nebula in the middle) and HH 26 (red clouds at the bottom)
Observation data: J2000.0[1] epoch
Right ascension05h 46m 07.34s[1]
Declination−00° 13′ 31.3″[1]
Distance1300 ly
ConstellationOrion
DesignationsHH 24, HH 25, HH 26, JCMTSF J054607.3-001333, HH 24/26, HH 24-26, HH 24-27

The region contains multiple protostars (two class 0 and one class I) and four more evolved IRAS sources. The three protostars are driving the Herbig-Haro objects in this region.[3]

Observation

The L1630 dark cloud also contains NGC 2071 and the Flame Nebula. HH 24-26 is located just a few arcminutes south of Messier 78.[5]

HH 24
An image of HH 24 taken by the Hubble Space Telescope

The image of HH 24 taken by the Hubble Space Telescope is probably the most well known image of this Herbig-Haro object. HH 24 resembles a lightsaber from the science fiction movies Star Wars and the Hubble image was published during the release of Star Wars Episode VII: The Force Awakens.[6]

HH 24 contains a class 0 protostar, which might be a proto-binary system. The disks around these objects are highly misaligned, which is a sign of turbulent fragmentation.[7]

References
  1. "HH 24-26". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-03-04.
  2. "Searching for Orphan Stars Amid Starbirth Fireworks". Gemini Observatory. 2015-09-25. Retrieved 2020-03-04.
  3. Benedettini, M.; Giannini, T.; Nisini, B.; Tommasi, E.; Lorenzetti, D.; Di Giorgio, A. M.; Saraceno, P.; Smith, H. A.; White, G. J. (July 2000). "The ISO spectroscopic view of the HH 24-26 region". A&A. 359: 148–158. Bibcode:2000A&A...359..148B. ISSN 0004-6361.
  4. Gibb, A. G.; Little, L. T. (February 1995). "HH24 26: structure, dynamics and chemistry". Ap&SS. 224 (1–2): 467–468. Bibcode:1995Ap&SS.224..467G. doi:10.1007/BF00667908. ISSN 0004-640X.
  5. Gibb, A. G.; Heaton, B. D. (September 1993). "The star-forming region around HH 24-26 : a revised morphology". A&A. 276: 511–521. Bibcode:1993A&A...276..511G. ISSN 0004-6361.
  6. "The awakened force of a star". ESA/Hubble. 17 December 2015. Retrieved 2020-03-04.
  7. Kang, Miju; Choi, Minho; Ho, Paul T. P.; Lee, Youngung (August 2008). "Millimeter Imaging of HH 24 MMS: A Misaligned Protobinary System". Astrophysical Journal. 683 (1): 267–271. arXiv:0805.0451. Bibcode:2008ApJ...683..267K. doi:10.1086/589819. ISSN 0004-637X.

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