Siam Physics Congress 2016

Session

Session XIX

V1

9 Jun 2016, 10:45

174. Variability Study of Active Galactic Nuclei at Visible and X-ray Wavelength

Mr Pakawee Surarittikul (Chulalongkorn), Mr Tinn Thongmeearkom (Chulalongkorn)

09/06/2016, 10:45

Astronomy, Astrophysics and Cosmology

Oral presentaion

Active galactic nuclei (AGNs) are signposts of accreting supermassive
black holes at the center of active galaxies. They often have large
and rapid variation in brightness, whose investigation can provide us
with insights on the innermost environment of the accretion disk. To
study their variability, we conduct photometric monitoring of a sample
of nearby AGNs at visible and X-ray...

141. The study of scaling relations of massive galaxy clusters using weak gravitional lensing technique

Mr Anirut Phriksee (Chiang Mai University)

09/06/2016, 11:00

Astronomy, Astrophysics and Cosmology

Oral presentaion

Weak gravitational lensing of galaxy cluster provides a direct method
to probe their mass distribution. We report our preliminary results on the
analysis of a complete sample of $\sim 50$ massive galaxy clusters,
in the redshift range 0.1 - 0.6, in the Canada France Hawaii Telescope Legacy Survey (CFHT-LS), drawn from the large sample built by Covone et al. (2014). For each galaxy...

112. Spectroscopic study of the RX Hya – an Algol-type system with pulsating, mass-accreting component

Ms Napaporn A-thano (National Astronomical Research Institute of Thailand, Chiang Mai 50200, Thailand)

09/06/2016, 11:15

Astronomy, Astrophysics and Cosmology

Oral presentaion

RX Hydrae is a short-period (2d.2815) Algol-type eclipsing binary system with a pulsating primary component. This system was discovered by H.S. Leavitt (Pickering, 1907), the first spectroscopic elements were determined by Struve (1946) and the absolute parameters of this system was derived by Vyas & Abhyankar (1989). Short-periodic pulsations in a light curve of a primary component were...

97. High-z Quasars Black Hole Mass Estimation via Photometric Reverberation Mapping

Ms Grittiya Pongsupa (Chiang Mai University)

09/06/2016, 11:30

Astronomy, Astrophysics and Cosmology

Oral presentaion

The mass of supermassive black holes (SMBHs) of high redshift (z) quasars is crucial for understanding SMBH-galaxy co-evolution. The traditional method, spectroscopic reverberation mapping (SRM), would fail for most high-z quasars and is inefficient for a large quasar sample. Photometric reverberation mapping (PRM) has been recently proposed in order to utilise the up-coming high cadence,...

95. Statistical Properties and Optical Followup of Fast Radio Bursts

Jompoj Wongphecauxson (Chiang Mai university)

09/06/2016, 11:45

Astronomy, Astrophysics and Cosmology

Oral presentaion

Fast radio bursts (FRBs) are intense transient millisecond radio signal with large dispersion measures (DM). Radio signal, which propagates through cold plasma, is dispersed as frequency square. After subtracted from the effect from galactic interstellar medium, the FRB's DMs are still large. This can be interpreted as FRBs have an extragalatic origin.As DM is related to the free electron...