HH 1/2

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HH 1/2
J2000.0 epoch
Right ascension05h 36m 22.8s[1]
Declination−06° 46′ 03″[1]
Distance1500[2] ly
ConstellationOrion[2]
DesignationsHH 1-2, HH 1/2, HH 1, HH 2
See also: Lists of nebulae

The

km/s.[2]

The central region

The central region contains an opaque cloud core with an

Microns. These sources were first detected with the Very Large Array and are therefore named VLA 1 and 2.[9] The source HH 1-2 VLA 1[10] drives the HH 1/2 pair and the source VLA 2 drives the Herbig-Haro objects HH 144/145.[11] There might be even a third outflow in the central region of HH 1/2, indicating a third member.[12]

The jet towards HH 1 is visible in optical images, but the counterjet towards HH 2 was detected in the infrared with the Spitzer Space Telescope.[13]

Gallery

  • An older version of the region mapped by the WFPC2 of the Hubble Space Telescope. The image also shows the jet in the lower right part in more detail
    An older version of the region mapped by the WFPC2 of the Hubble Space Telescope. The image also shows the jet in the lower right part in more detail
  • Multiple Herbig-Haro Objects mapped by the Hubble Space Telescope, including HH 2 at the lower right. HH 47 is at the top part and part of HH 34 is at the lower left.
    Multiple Herbig-Haro Objects mapped by the Hubble Space Telescope, including HH 2 at the lower right.
    HH 47 is at the top part and part of HH 34
    is at the lower left.
  • The reflection nebula NGC 1999 (blue cloud in the center) and the Herbig-Haro Objects HH 1/2 below NGC 1999 as small pink clouds.
    The reflection nebula NGC 1999 (blue cloud in the center) and the Herbig-Haro Objects HH 1/2 below NGC 1999 as small pink clouds.

References

  1. ^ a b "HH 1-2". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-15.
  2. ^
    S2CID 118242041
    .
  3. ^
    ISSN 0004-637X
    .
  4. ISSN 0004-637X
    .
  5. S2CID 125612968
    .
  6. ISSN 0004-6256
    .
  7. S2CID 13878953
    .
  8. ISSN 0185-1101
    .
  9. S2CID 59520064
    .
  10. ^ "HH 1-2 VLA 1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-15.
  11. ISSN 0004-637X
    .
  12. ISSN 0004-6256
    .
  13. S2CID 1793062
    .
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