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Strange Rhythms, Strange Objects

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Rhythm in the Sky

Part of the book series: Studies in Rhythm Engineering ((SRE))

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Abstract

Advances in instrumentation have uncovered many new phenomena in the universe. Some have been found to repeat, either sporadically or with a more regular period. Many more are suspected to be actually repetitive; they appear as one-off events possibly due to the limitations of the period of observation. These include novae and fast radio bursts. Novae and X-ray bursts are believed to result from accretion in a binary system from a companion star onto a compact object like a white dwarf or a neutron star. Periodic oscillations are found to be associated with sporadic events like Type I X-ray bursts, though their origin is not understood. Fast radio bursts are of varied nature, indicating that origin of different classes may be different.

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Notes

  1. 1.

    Roche lobe is the region around a star in a binary system within which orbiting material is gravitationally bound to that star.

  2. 2.

    SN Ia occurs when the mass of the white dwarf crosses Chandrasekhar limit so that the electron degeneracy pressure can no longer sustain the star against collapse. This results in a violent explosion.

  3. 3.

    Because of the ionised component of interstellar medium, principally due to free electrons, high-frequency components of a radio pulse arrive earlier than the low-frequency components. DM can be estimated from measurement of this delay, and can give an idea of the distance of the source.

  4. 4.

    A neutron star with extremely strong magnetic field, of the order of \(10^9\)–\(10^{11}\)T.

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Authors and Affiliations

  1. Department of Physics, University of Calcutta, Kolkata, West Bengal, India

    Gautam Gangopadhyay & Anirban Kundu

Authors
  1. Gautam Gangopadhyay
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  2. Anirban Kundu
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Correspondence to Gautam Gangopadhyay .

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Gangopadhyay, G., Kundu, A. (2024). Strange Rhythms, Strange Objects. In: Rhythm in the Sky. Studies in Rhythm Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-2588-5_8

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