Astrophysical Polarimetry in the Time-Domain Era

Session

Polarization and supernovae, novae and kilonovae

30 Aug 2022, 11:40

Politecnico di Milano - Polo territoriale di Lecco

Conveners

Polarization and supernovae, novae and kilonovae

• Iain Steele (Liverpool John Moore University)

Polarization and supernovae, novae and kilonovae

• Iain Steele (Liverpool John Moore University)

70. Probing the Shapes of Thermonuclear Explosions through Early to Late-Time Polarimetry

Dr Yang Yi (Weizmann Institute)

30/08/2022, 11:40

Oral

Thanks to the rapid detections of supernovae by modern high-cadence wide-field transient surveys, the geometry properties of supernovae can be probed at unprecedented phases early as the first few days after the explosion. The geometry through the outer to inner layers can be inferred observationally through tomographic dissection, for example, with time-resolved spectropolarimetry that is...

86. Spectropolarimetry of core collapse supernovae: 35 years and counting

Dr Heloise Stevance (Department of Physics, The University of Auckland)

30/08/2022, 12:15

Oral

I will give a brief of overview of what spectropolarimetry has taught us about core collapse supernovae and stripped envelope supernovae, as well as highlight what I see as being the main challenges/issues that now need to be addressed to take us to the next level.

91. Shedding light on the geometry of neutron star mergers with kilonova polarimetry

Mattia Bulla

30/08/2022, 14:15

Oral

The detection of an electromagnetic counterpart to the gravitational-wave source GW170817 marked year zero of the multi-messenger gravitational-wave era. This event was generated by the merger of two neutron stars and gave rise to an electromagnetic transient, dubbed a "kilonova", which was intensively monitored with all the main ground-based and space-borne facilities. The general agreement...

95. Hydrogen-poor superluminous supernova with aspherical circumstellar material

Miika Pursiainen (DTU Space, Techical University of Denmark)

30/08/2022, 14:50

Oral

Superluminous supernovae (SLSNe) are a fascinating population of stellar explosions. They are too luminous ($M<-21$) to be powered by the decay of radioactive $^{56}$Ni, the canonical power source of normal Type Ia and Ib/c SNe, but numerous studies based mostly on conventional photometry and spectroscopy have not yet been conclusive on the nature of the physical mechanism. Here I show that...

92. Are peculiar extinction and polarization properties along the sightlines toward Type Ia Supernovae produced by circumstellar or interstellar matter?

Aleksandar Cikota (ESO Chile)

30/08/2022, 15:10

Oral

Polarimetry offers an independent method to the study inter/circum-stellar dust properties by observing the continuum polarization. Some highly reddened Type Ia Supernovae (SNe Ia) display peculiar extinction curves with low $R_V$ values and polarization curves steeply rising towards blue wavelengths, different from typical Serkowski-like polarization curves observed towards normal Milky Way...