Large-scale CO maps of the Lupus Molecular Cloud Complex

N. F H Tothill, A. Löhr, S. C. Parshley, A. A. Stark, A. P. Lane, J. I. Harnett, G. A. Wright, Christopher K Walker, T. L. Bourke, P. C. Myers

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Fully sampled degree-scale maps of the 13CO 2-1 and CO 4-3 transitions toward three members of the Lupus Molecular Cloud Complex - Lupus I, III, and IV - trace the column density and temperature of the molecular gas. Comparison with IR extinction maps from the c2d project requires most of the gas to have a temperature of 8-10 K. Estimates of the cloud mass from 13CO emission are roughly consistent with most previous estimates, while the line widths are higher, around 2 km s-1. CO 4-3 emission is found throughout Lupus I, indicating widespread dense gas, and toward Lupus III and IV. Enhanced line widths at the NW end and along the edge of the B 228 ridge in Lupus I, and a coherent velocity gradient across the ridge, are consistent with interaction between the molecular cloud and an expanding H I shell from the Upper-Scorpius subgroup of the Sco-Cen OB Association. Lupus III is dominated by the effects of two HAe/Be stars, and shows no sign of external influence. Slightly warmer gas around the core of Lupus IV and a low line width suggest heating by the Upper-Centaurus-Lupus subgroup of Sco-Cen, without the effects of an H I shell.

Original languageEnglish (US)
Pages (from-to)98-123
Number of pages26
JournalAstrophysical Journal, Supplement Series
Volume185
Issue number1
DOIs
StatePublished - 2009

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molecular clouds
subgroups
ridges
gases
gas
shell
molecular gases
estimates
extinction
stars
gradients
heating
temperature
interactions
effect

Keywords

  • ISM: clouds
  • ISM: individual (Lupus)
  • Submillimeter

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Tothill, N. F. H., Löhr, A., Parshley, S. C., Stark, A. A., Lane, A. P., Harnett, J. I., ... Myers, P. C. (2009). Large-scale CO maps of the Lupus Molecular Cloud Complex. Astrophysical Journal, Supplement Series, 185(1), 98-123. https://doi.org/10.1088/0067-0049/185/1/98

Large-scale CO maps of the Lupus Molecular Cloud Complex. / Tothill, N. F H; Löhr, A.; Parshley, S. C.; Stark, A. A.; Lane, A. P.; Harnett, J. I.; Wright, G. A.; Walker, Christopher K; Bourke, T. L.; Myers, P. C.

In: Astrophysical Journal, Supplement Series, Vol. 185, No. 1, 2009, p. 98-123.

Research output: Contribution to journalArticle

Tothill, NFH, Löhr, A, Parshley, SC, Stark, AA, Lane, AP, Harnett, JI, Wright, GA, Walker, CK, Bourke, TL & Myers, PC 2009, 'Large-scale CO maps of the Lupus Molecular Cloud Complex', Astrophysical Journal, Supplement Series, vol. 185, no. 1, pp. 98-123. https://doi.org/10.1088/0067-0049/185/1/98
Tothill NFH, Löhr A, Parshley SC, Stark AA, Lane AP, Harnett JI et al. Large-scale CO maps of the Lupus Molecular Cloud Complex. Astrophysical Journal, Supplement Series. 2009;185(1):98-123. https://doi.org/10.1088/0067-0049/185/1/98
Tothill, N. F H ; Löhr, A. ; Parshley, S. C. ; Stark, A. A. ; Lane, A. P. ; Harnett, J. I. ; Wright, G. A. ; Walker, Christopher K ; Bourke, T. L. ; Myers, P. C. / Large-scale CO maps of the Lupus Molecular Cloud Complex. In: Astrophysical Journal, Supplement Series. 2009 ; Vol. 185, No. 1. pp. 98-123.
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