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Resolving the Transition from Molecular to Atomic at 1/5 Solar Metallicity in the Small Magellanic Cloud

Part of: IAU Issue 315 - From Interstellar Clouds...

Published online by Cambridge University Press:  12 September 2016

Katherine E. Jameson ,
Alberto D. Bolatto ,
Mark Wolfire ,
Monica Rubio ,
Rodrigo Herrera Camus  and
the HS Collaboration
Katherine E. Jameson
Affiliation:
Astronomy Department and Laboratory for Millimeter-wave Astronomy, University of Maryland, College Park, MD, 20742, USA email: [email protected]
Alberto D. Bolatto
Affiliation:
Astronomy Department and Laboratory for Millimeter-wave Astronomy, University of Maryland, College Park, MD, 20742, USA email: [email protected]
Mark Wolfire
Affiliation:
Astronomy Department and Laboratory for Millimeter-wave Astronomy, University of Maryland, College Park, MD, 20742, USA email: [email protected]
Monica Rubio
Affiliation:
Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Casilla 36-D, Santiago, Chile
Rodrigo Herrera Camus
Affiliation:
Astronomy Department and Laboratory for Millimeter-wave Astronomy, University of Maryland, College Park, MD, 20742, USA email: [email protected] Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching, Germany
the HS Collaboration
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching, Germany
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Abstract

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At a distance of 61 kpc, the Small Magellanic Cloud (SMC) affords an absolutely unique view of the low metallicity star-forming interstellar medium, providing the nearest laboratory to study processes relevant to star formation at high redshifts. We present new ALMA 7m-array maps of CO and 12CO (2-1) for one of the four observed regions in the Southwest Bar of the SMC. These maps are the first high-resolution (~6″ ~ 1.7 pc) images of CO in a molecular cloud at 1/5 Solar metallicity. We show the structure of photodissociation regions for the first time at 1/5 Solar metallicity by combining the new ALMA data with Herschel maps of [C ii] and [O i]. We present preliminary evidence that there is extended, faint 12CO (2-1) emission near where we expect the Hi-to-H2 transition. We also compare our data to the low metallicity 3D simulations by Glover & Mac Low (2011) and Shetty et al. (2011).

Keywords

ISM: cloudsISM: structuregalaxies: ISMMagellanic Clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S315: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes? , August 2015 , pp. 13 - 16
Copyright
Copyright © International Astronomical Union 2016 

References

Bolatto, A. D., Leroy, A. K., Jameson, K., et al. 2011, ApJ, 741, 12 CrossRefGoogle Scholar
Bolatto, A. D., Wolfire, M., & Leroy, A. K. 2013, ARA&A, 51, 207 Google Scholar
Glover, S. C. O. & Mac Low, M.-M. 2011, MNRAS, 412, 337 CrossRefGoogle Scholar
Israel, F. P., Johansson, L. E. B., Lequeux, J., et al. 1993, A&A, 276, 25 Google Scholar
Israel, F. P. 1997, A&A, 328, 471 Google Scholar
Israel, F. P., Johansson, L. E. B., Rubio, M., et al. 2003, A&A, 406, 817 Google Scholar
Jameson, K. E., Bolatto, A. D., Leroy, A. K., et al. 2015, ApJ, submitted (arXiv:1510.08084)Google Scholar
Jameson, K. E., Bolatto, A. D., Wolfire, M., et al. 2015, in prep Google Scholar
Kaufman, M. J., Wolfire, M. G., Hollenbach, D. J., & Luhman, M. L. 1999, ApJ, 527, 795 Google Scholar
Lee, C., Leroy, A. K., Schnee, S., et al. 2015, MNRAS, 450, 2708 Google Scholar
Leroy, A., Bolatto, A., Stanimirović, S., et al. 2007, ApJ, 658, 1027 CrossRefGoogle Scholar
Leroy, A. K., Bolatto, A., Bot, C., et al. 2009, ApJ, 702, 352 CrossRefGoogle Scholar
Leroy, A. K., Bolatto, A., Gordon, K., et al. 2011, ApJ, 737, 12 CrossRefGoogle Scholar
Madden, S. C., Poglitsch, A., Geis, N., Stacey, G. J., & Townes, C. H. 1997, ApJ, 483, 200 CrossRefGoogle Scholar
Mizuno, N., Yamaguchi, R., Mizuno, A., et al. 2001, PASJ, 53, 971 Google Scholar
Pagel, B. E. J. 2003, in: Charbonnel, C. and Schaerer, D. and Meynet, G. (eds.), CNO in the Universe, ASP Conference Series Volume 304 (San Francisco: ASP) p. 187 Google Scholar
Pak, S., Jaffe, D. T., van Dishoeck, E. F., Johansson, L. E. B., et al. 1998, ApJ, 498, 735 Google Scholar
Pineda, J. L., Langer, W. D., Velusamy, T., & Goldsmith, P. F. 2013, A&A, 554, A103 Google Scholar
Rubio, M., Garay, G., Montani, J., & Thaddeus, P. 1991, ApJ, 368, 173 Google Scholar
Rubio, M., Garay, G., Montani, J., & Thaddeus, P. 1991, ApJ, 368, 173 CrossRefGoogle Scholar
Rubio, M., Lequeux, J., & Boulanger, F. 1993, A&A, 271, 9 Google Scholar
Rubio, M., Bolatto, A. D., Jameson, K. E., et al. 2015, in prep Google Scholar
Shetty, R., Glover, S. C., Dullemond, C. P., et al. 2011, MNRAS 415, 3253 CrossRefGoogle Scholar
Skibba, R. A., Engelbracht, C. W., Aniano, G., et al. 2012, ApJ 761, 42 Google Scholar
Stacey, G. J., Geis, N., Genzel, R., et al. 1991, ApJ, 373, 423 Google Scholar
Tielens, A. G. G. M. & Hollenbach, D. 1985, ApJ, 291, 722 CrossRefGoogle Scholar
Wolfire, M. G., Hollenbach, D., & Tielens, A. G. G. M. 1989, ApJ 344, 770 Google Scholar
Wolfire, M. G., Hollenbach, D., & McKee, C. F. 2010, ApJ 716, 1191 Google Scholar
Wolfire, M. G., et al. 2015, in prep Google Scholar