The Role of Far-ultraviolet Pumping in Exciting the [Oi] Lines in Protostellar Disks and Winds

Ahmad Nemer, Jeremy Goodman, Lile Wang

Research output: Contribution to journalArticlepeer-review

Abstract

We use Cloudy to re-examine excitation of [O i] 6300 and [O i] 5577 in the X-ray driven photoevaporative wind models of Owen and collaborators, and in more recent magnetothermal models by Wang et al. We find that, at the measured accretion luminosities, the far-ultraviolet (FUV) radiation would populate the upper levels of the oxygen, which would eventually contribute to the [O i] lines. FUV pumping competes with collisions as an excitation mechanism of the [O i] lines, and they each originate from a distinct region in the protostellar disk environment. Consequently, the line strengths and shapes of [O i] 6300 and [O i] 5577 would be affected by the inclusion of FUV pumping in the radiation transport simulations.

Original languageEnglish (US)
Article numberL27
JournalAstrophysical Journal Letters
Volume904
Issue number2
DOIs
StatePublished - Dec 1 2020

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Atomic physics (2063)
  • Atomic spectroscopy (2099)
  • Protoplanetary disks (1300)

Fingerprint Dive into the research topics of 'The Role of Far-ultraviolet Pumping in Exciting the [Oi] Lines in Protostellar Disks and Winds'. Together they form a unique fingerprint.

Cite this