Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-29T15:04:11.828Z Has data issue: false hasContentIssue false
  • English
  • Français

Pulsar searches in nearby dwarf spheroidal galaxies

Published online by Cambridge University Press:  20 March 2013

Eduardo Rubio-Herrera  and
Thomas Maccarone
Eduardo Rubio-Herrera
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Apartado Postal 70–264, CP04510, México DF, México email: [email protected]
Thomas Maccarone
Affiliation:
School of Physics & Astronomy, University of Southampton, Highfield, Southampton S017 1BJUnited Kingdom email: [email protected]
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 have been undertaking a comprehensive survey for pulsars and fast radio transients in the dwarf spheroidal satellite galaxies of the Milky Way using the Green Bank Radio Telescope operating at a central frequency of 350 MHz. Our search pipeline allows the detection of periodical signals and single dispersed pulses and it is optimized to search for millisecond radio pulsars. Here we present preliminary results of the searches we have conducted in the Ursa Minoris, Draco and Leo I dwarf spheroidal satellite galaxies. Our searches have revealed no periodic signals but a few unconfirmed millisecond single pulses at various dispersion measures, possibly related to neutron stars. Detecting neutron stars in these systems can potentially help to test the existence of haloes of dark matter surrounding these systems as predicted by Dehnen & King (2006).

Keywords

galaxies: dwarf spheroidalsstars: neutronpulsars: generalsearchesindividual pulses
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 111 - 114
Copyright
Copyright © International Astronomical Union 2013

References

Cordes, J. M. & McLaughlin, M. A. 2003, ApJ, 596, 1142CrossRefGoogle Scholar
Cordes, J. M. & Lazio, T. J. W. 2002, ArXiv preprint, http://xxx.lanl.gov/abs/astro-ph/0207156Google Scholar
Dehnen, W. & King, A. 2006, MNRAS, 367, L29Google Scholar
Gallagher, J. S., Madsen, G. J., Reynolds, R. J., Grebel, E. K., & Smecker-Hane, T. A. 2003, ApJ, 588, 326Google Scholar
Lorimer, D. R., Bailes, M., McLaughlin, M., et al. 2007, Science, 318, 777Google Scholar
Maccarone, T. J., Kundu, A., Zepf, S. E., Piro, A. L., & Bildsten, L. 2005, MNRAS, 364, L61Google Scholar
Manchester, R. N., Fan, G., Lyne, A., Kaspi, V. M., & Crawford, F. 2006, ApJ, 649, 235Google Scholar
McCulloch, P. M., Hamilton, P. A., Ables, J. G., & Hunt, A. J. 1983, Nature, 303, 307Google Scholar
McLaughlin, M. A. & Cordes, J. M. 2003, ApJ, 596, 982Google Scholar
Podsiadlowski, P., Pfahl, E., & Rappaport, S. 2005, in Rasio, F. A., Stairs, I. H., eds, ASP Conf. Ser. Vol. 328, Binary Radio pulsars. Astron. Soc. Pac., San Francisco, p.327Google Scholar
Ransom, S. M., Eikenberry, S. S., & Middleditch, J. 2002, AJ, 124, 1788Google Scholar
Stappers, B. W., Hessels, J. W. T., Alexov, A., et al. 2011, A&A, 530, A80Google Scholar