A CSO Search for $l$-C$_3$H$^+$: Detection in the Orion Bar PDR

Brett A. McGuire; P. Brandon Carroll; James L. Sanders; Susanna L. Widicus Weaver; Geoffrey A. Blake; Anthony J. Remijan

doi:10.1093/mnras/stu1047

A CSO Search for $l$-C$_3$H$^+$: Detection in the Orion Bar PDR

Astrophysics of Galaxies 2015-06-19 v1

Authors: Brett A. McGuire , P. Brandon Carroll , James L. Sanders , Susanna L. Widicus Weaver , Geoffrey A. Blake , Anthony J. Remijan

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Abstract

The results of a Caltech Submillimeter Observatory (CSO) search for $l$ -C $_3$ H $^+$ , first detected by Pety et al. (2012) in observations toward the Horsehead photodissociation region (PDR), are presented. A total of 39 sources were observed in the 1 mm window. Evidence of emission from $l$ -C $_3$ H $^+$ is found in only a single source - the Orion Bar PDR region, which shows a rotational temperature of 178(13) K and a column density of 7(2) x $10^{11}$ cm $^{-2}$ . In the remaining sources, upper limits of ~10 $^{11} - 10^{13}$ cm $^{-2}$ are found. These results are discussed in the context of guiding future observational searches for this species.

Keywords

$l$-C$_3$H$^+$ Orion Bar photodissociation region Caltech Submillimeter Observatory rotational temperature column density molecular ion

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@article{arxiv.1405.7057,
  title  = {A CSO Search for $l$-C$_3$H$^+$: Detection in the Orion Bar PDR},
  author = {Brett A. McGuire and P. Brandon Carroll and James L. Sanders and Susanna L. Widicus Weaver and Geoffrey A. Blake and Anthony J. Remijan},
  journal= {arXiv preprint arXiv:1405.7057},
  year   = {2015}
}

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9 pages, 8 figures, 4 tables

A CSO Search for $l$-C$_3$H$^+$: Detection in the Orion Bar PDR

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