Hostname: page-component-cd4964975-598jt Total loading time: 0 Render date: 2023-03-28T07:18:14.085Z Has data issue: true Feature Flags: { "useRatesEcommerce": false } hasContentIssue true

Diffuse Interstellar Bands in M33

Published online by Cambridge University Press:  21 February 2014

K. T. Smith
School of Chemistry, The University of Nottingham, Nottingham, NG7 2RD, UK email: Royal Astronomical Society, Burlington House, Piccadilly, London, W1J 0BQ, UK
M. A. Cordiner
NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20770, USA
C. J. Evans
UK Astronomy Technology Centre, Royal Observatory Edinburgh, Edinburgh, EH9 3HJ, UK
N. L. J. Cox
Institute for Astronomy, KU Leuven, Celestijnenlaan 200D, bus 2401, Leuven, Belgium
P. J. Sarre
School of Chemistry, The University of Nottingham, Nottingham, NG7 2RD, UK email:
Rights & Permissions[Opens in a new window]


HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present the first sample of diffuse interstellar bands (DIBs) in the nearby galaxy M33. Studying DIBs in other galaxies allows the behaviour of the carriers to be examined under interstellar conditions which can be quite different from those of the Milky Way, and to determine which DIB properties can be used as reliable probes of extragalactic interstellar media. Multi-object spectroscopy of 43 stars in M33 has been performed using Keck/DEIMOS. The stellar spectral types were determined and combined with literature photometry to determine the M33 reddenings E(B-V)M33. Equivalent widths or upper limits have been measured for the λ5780 DIB towards each star. DIBs were detected towards 20 stars, demonstrating that their carriers are abundant in M33. The relationship with reddening is found to be at the upper end of the range observed in the Milky Way. The line of sight towards one star has an unusually strong ratio of DIB equivalent width to E(B-V)M33, and a total of seven DIBs were detected towards this star.

Contributed Papers
Copyright © International Astronomical Union 2014 


Clark, J. S., et al. 2012, A&A, 541, A146Google Scholar
Cordiner, M. A. 2006, PhD thesis, The University of NottinghamGoogle Scholar
Cordiner, M. A., et al. 2008a, A&A, 480, L13Google Scholar
Cordiner, M. A., et al. 2008b, A&A, 492, L5Google Scholar
Cordiner, M. A., et al. 2011, ApJ, 726, 39CrossRefGoogle Scholar
Cox, N. L. J. & Patat, F. 2008, A&A, 485, L9Google Scholar
Cox, N. L. J., et al. 2006, A&A, 447, 991Google Scholar
Cox, N. L. J., et al. 2007, A&A, 470, 941Google Scholar
Evans, C. J. & Howarth, I. D. 2003, MNRAS, 345, 1223CrossRefGoogle Scholar
Evans, C. J., et al. 2004, MNRAS, 353, 601CrossRefGoogle Scholar
Faber, S. M., et al. 2003, Proc. SPIE, 4841, 1657CrossRefGoogle Scholar
Fitzgerald, M. P. 1970, A&A, 4, 234Google ScholarPubMed
Friedman, S. D., et al. 2011, ApJ, 727, 33CrossRefGoogle Scholar
Martins, F. & Plez, B. 2006, A&A, 457, 637Google Scholar
Massey, P., et al. 2006, AJ, 131, 2478CrossRefGoogle Scholar
Smith, K. T. 2010, PhD thesis, The University of NottinghamGoogle Scholar
Thöne, C. C., et al. 2009, ApJ, 698, 1307CrossRefGoogle Scholar
Welty, D. E., et al. 2006, ApJS, 165, 138CrossRefGoogle Scholar