Hostname: page-component-7c8c6479df-fqc5m Total loading time: 0 Render date: 2024-03-29T12:08:48.267Z Has data issue: false hasContentIssue false

Spikes in the SED and ripples in the outskirts of galaxies

Published online by Cambridge University Press:  17 August 2012

Sukanya Chakrabarti*
Affiliation:
777 Glades Road, Florida Atlantic University, Boca Raton, FL 33431 email: schakra1@fau.edu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are 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 describe a new method that allows us to quantitatively characterize galactic satellites from analysis of disturbances in outer gas disks, without requiring knowledge of their optical light. We have demonstrated the validity of this method, which we call Tidal Analysis, by applying it to local spirals with known optical companions, including M51 and NGC 1512. These galaxies span the range from having a low mass companion (~ one-hundredth the mass of the primary galaxy) to a fairly massive companion (~ one-third the mass of the primary galaxy). This approach has broad implications for many areas of astrophysics – for the indirect detection of dark matter (or dark matter-dominated dwarf galaxies), and for galaxy evolution in its use as a decipher of the dynamical impact of satellites on galactic disks. Here, we present some preliminary results on the emergent SEDs and images, calculated along the time sequence of these dynamical simulations using the 3-D self-consistent Monte Carlo radiative transfer code RADISHE. We explore star formation prescriptions and how they affect the emergent SEDs and images. Our goal is to identify SED colors that are primarily affected by the galaxy's interaction history, and are not significantly affected by the choice of star formation prescription. If successful, we may be able to utilize the emergent UV-IR SED of the primary galaxy to understand its recent interaction history.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2012

References

Bigiel, F., Leroy, A., Seibert, M., et al. 2010, Astronomical Journal, 140, 1194CrossRefGoogle Scholar
Chakrabarti, S., Cox, T. J., Hernquist, L., et al. 2007, ApJ, 658, 840Google Scholar
Chakrabarti, S., Fenner, Y., Cox, T. J., Hernquist, L., & Whitney, B. A., 2008, ApJ, 688, 972Google Scholar
Chakrabarti, S. & Whitney, B. A., 2009, ApJ 690 1432 [CW09]CrossRefGoogle Scholar
Chakrabarti, S. & Blitz, L., 2009, MNRAS 399 L118 [CB09]Google Scholar
Chakrabarti, S. & Blitz, L., 2011, ApJ 731 40C [CB11]Google Scholar
Chakrabarti, S., Bigiel, F., Chang, P., & Blitz, L. 2011, ApJ 743 35 [CBCB]Google Scholar
Chakrabarti, S., 2011, ApJ submitted arXiv: 1112.1416Google Scholar
Chang, P. & Chakrabarti, S., 2011, MNRAS 416 618C [CC11]Google Scholar
Colless, M., Dalton, G., Maddox, S., et al. 2001, MNRAS, 328, 1039CrossRefGoogle Scholar
Debattista, V., Moore, B., Quinn, T., et al. 2008, ApJ, 681, 1076Google Scholar
Jonsson, P., Groves, B. A., & Cox, T. J. 2010, MNRAS, 403, 17Google Scholar
Kennicutt, R. C. Jr., Armus, L., Bendo, G., et al. 2003, PASP, 115, 928CrossRefGoogle Scholar
Klypin, A., Kravtsov, A. V. et al. 1999, ApJ, 522, 82CrossRefGoogle Scholar
Levine, E. S., Blitz, L. & Heiles, C., 2006, Science, 312, 1773L.Google Scholar
Leroy, A., Walter, F., Brinks, E., et al. 2008, ApJ, 136, 2782Google Scholar
Maccio, A. et al. 2008, MNRAS, 391, 1940Google Scholar
Mandelbaum, R., Seljak, U., Kauffmann, G., Hirata, C. M., & Brinkmann, J. 2006, MNRAS, 368, 715Google Scholar
Salo, H. & Laurikainen, E., 2000, MNRAS, 319, 393Google Scholar
Smith, J., et al. 1990, ApJ, 362, 455S.Google Scholar
Springel, V., 2005, MNRAS, 364, 1105Google Scholar
Springel, V., Di Matteo, T., & Hernquist, L. 2005, MNRAS, 361, 776Google Scholar
Springel, V., Frenk, C. S., & White, S. D. M., 2006, Nature, 440, 1137CrossRefGoogle Scholar
Strigari, L., Koushiappas, S., Bullock, J., et al. 2008, ApJ, 678, 614S.CrossRefGoogle Scholar
Thilker, D., Bianchi, L., Meurer, G., et al. 2007, ApJS, 173, 538CrossRefGoogle Scholar
Treu, T. & Koopmans, L., 2002, ApJ, 575, 84CrossRefGoogle Scholar
Walter, F. et al. 2008, Astronomical Journal, 136, 2563Google Scholar
White, S. D. M. & Rees, M. J., 1978, MNRAS, 183, 341Google Scholar
Wood, K., Whitney, B. A., Robitaille, T., & Draine, B. T. 2008, ApJ, 688, 1118Google Scholar
Wright, C. O. & Brainerd, T. G. 2000, ApJ, 534, 34Google Scholar