GW1 - Sources of Gravitational Waves |
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Speaker |
Mukhopadhyay, Banibrata |
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Coauthors |
Rao, AR |
| Talk Title |
Plausible emission of gravitational wave from highly magnetized and/or modified gravity induced white dwarfs |
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Abstract |
Since last half a decade of so, we have initiated exploring possible existence of highly magnetized white dwarfs (B-WDs) and also white dwarfs in modified gravity (MG-WD), with a new super-Chandrasekhar mass-limit. It has many implications including observed over-luminous type Ia supernovae, white dwarf pulsars, soft gamma-ray repeaters and anomalous X-ray pulsars. In the talk, we however show that these spinning B-WDs and MG-WDs are attractive sites for gravitational radiation. The amplitude of gravitational wave produced by a B-WD/MG-WD with mass of the order of 2 solar mass, polar radius 700 km, rotational period about 1 sec with oblateness parameter 1/10000 and at 100 pc away from us is within the sensitivity of the Einstein@Home search for early LIGO. If the B-WD/MG-WD’s polar radius is 2000 km, rotational period 10 sec and other parameters intact as above, a firm confirmation of gravitational wave emission can be provided by DECIGO/BBO. Nevertheless, high magnetic field rotating white dwarfs approaching a B-WD would be common and it is possible that such white dwarfs of radius about 7000 km, period 20 sec, at a distance 10 pc will is detectable by LISA. |
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Talk view |
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