The Intricate Structure of HH 508, the Brightest Microjet in the Orion Nebula

Ya Lin Wu, Laird M. Close, Jinyoung Serena Kim, Jared R. Males, Katie M. Morzinski

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We present Magellan adaptive optics Hα imaging of HH 508, which has the highest surface brightness among protostellar jets in the Orion Nebula. We find that HH 508 actually has a shorter component to the west, and a longer and knotty component to the east. The east component has a kink at 0.″3 from the jet-driving star θ 1 Ori B2, so it may have been deflected by the wind/radiation from the nearby θ 1 Ori B1B5. The origin of both components is unclear, but if each of them is a separate jet, then θ 1 Ori B2 may be a tight binary. Alternatively, HH 508 may be a slow-moving outflow, and each component represents an illuminated cavity wall. The ionization front surrounding θ 1 Ori B2B3 does not directly face θ 1 Ori B1B5, suggesting that the EUV radiation from θ 1 Ori C plays a dominant role in affecting the morphology of proplyds even in the vicinity of θ 1 Ori B1B5. Finally, we report an Hα blob that might be ejected by the binary proplyd LV 1.

Original languageEnglish
Article number144
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 2018 Feb 20
Externally publishedYes


  • H II regions
  • ISM: individual objects (Orion Nebula, HH 508, LV 1)
  • protoplanetary disks
  • stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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