ALMA at 10 years: Past, Present, and Future. December 4-8 , 2023. Puerto Varas, Chile.
Published November 26, 2023 | Version v1
Poster Open

Unlocking the Potential of l-C3H+ as a Tracer of UV Enriched Fields

Authors/Creators

  • 1. National Radio Astronomy Observatory
  • 2. ROR icon Massachusetts Institute of Technology

Description

The interstellar molecule l-C3H+ appears to be the most sensitive and definitive molecular tracer of enhanced UV-flux ever observed in the ISM. Extensive, deep searches for this species in dozens of sources show its presence nearly exclusively in UV-enhanced regions. Yet, our understanding of the spatial distribution of the molecule within these sources, and the excitation conditions (and abundances) in previously-observed regions, is sorely lacking. ALMA observations of l-C3H+ in the Horsehead PDR region reveal an unexpected large-scale distribution of l-C3H+. With these data we show the spatial distribution, abundance, and excitation of this potentially transformational molecule in our ability to probe the extent of UV-enhanced flux.

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Additional details

Dates

Created
2023-11-26

References

  • Bergin, E. A., Du, F., Cleeves, L. I., et al. 2016, ApJ, 831, 101
  • Guzmán, V. V., Pety, J., Goicoechea, J. R., et al. 2015, ApJL, 800, 1
  • Herbst, E., Adams, N. G., Smith, D., 1984, ApJ, 285, 618
  • McGuire, B. A., Carroll, P. B., Loomis, R. A., et al. 2013, ApJ, 774, 56
  • McGuire, B. A., Carroll, P. B., Sanders, J. L. I., et al. 2014a, MNRAS, 442, 2901
  • McGuire, B. A., Carroll, P. B., Gratier, P., et al. 2014b, ApJ, 783, 36
  • Pety, J., Gratier, P., Guzmán, V., et al. 2012, A&A, 548,A68
  • Tielens, A. G. G. M. 2008, ARA&A, 46, 289