Mayusree Das, Indian Institute of Science, Bangalore, India

Several neutron stars (NSs), more massive than two solar masses, have recently been observed. On the other hand, the existence of white dwarfs (WDs) violating the Chandrasekhar mass limit was inferred from the peak luminosities of type Ia supernovae. Hence, there is a generic question of the origin of massive compact objects. We simulated such massive, magnetized, rotating compact objects using XNS code. We visualize the deformation of the compact objects due to magnetic field (toroidal and poloidal) and rotation (uniform or differential), by solving the Einstein equation (describing space-time metric) and Magneto-Hydrostatic Equilibrium (providing distribution of matter/energy) simultaneously. Such isolated rotating, magnetized objects with magnetic and rotation axes misaligned, can emit continuous gravitational waves (CGWs). Our aim is to venture into the detection possibility of isolated NSs and WDs by CGWs, which are difficult to detect in electromagnetic surveys, such as SDSS, Kepler, and Gaia. We discuss the decay of magnetic field, angular velocity, obliquity angle, and hence the decay of GW amplitude with time. These explorations suggest that the detection of massive compact objects is challenging and sets a timescale for detection. However, even if not detected immediately, they can be detected by Einstein Telescope, Cosmic Explorer, BBO, and DECIGO over months of integrated detection. This leads to the direct detection of isolated NSs and WDs, respectively.