S. Ananthamurthy

Scattering polarization in the presence of magnetic and electric fields (2007)

Yee Yee Oo, Sampoorna, M, Nagendra, K. N, Ananthamurthy, S, Ramachandran, G

The polarization of radiation by scattering on an atom embedded in combined external quadrupole electric and uniform magnetic fields is studied theoretically. Limiting cases of scattering under...

Scattering Polarization in the Presence of Magnetic and Electric Fields (2007)

Oo, Yee Yee, Sampoorna, M, Nagendra, K. N, Ananthamurthy, S, Ramachandran, G

The polarization of radiation by scattering on an atom embedded in combined external quadrupole electric and uniform magnetic fields is studied theoretically. Limiting cases of scattering under...

Mass function of open clusters NGC 1857 and Czernik 25 (2006)

Sujatha, S, Babu, G. S. D, Ananthamurthy, S

The first CCD photometric UBVRI observations of the open clusters NGC 1857 (Czernik 20, OCl 427) and Czernik 25 (OCl 493) are presented. The observations were obtained on 28 November 2003 with the 2m...

Polarization of line radiation in the presence of external electric quadrupole and uniform magnetic fields: II. Arbitrary orientation of magnetic field (2005)

Yee Yee Oo, Nagendra, K. N, Ananthamurthy, S, Sirsi, S, Vijayashanka, R, Ramachandran, G

In continuation of our earlier investigation (referred to hereafter as part I) where we considered the mathematically simple case of magnetic field orientation along the Z-axis of the principal axes...

UBVRI CCD photometric studies of open clusters Berkeley 15, Czernik 18 and NGC 2401 (2004)

Sujatha, S, Babu, G. S. D, Ananthamurthy, S

CCD photometric observations of three open clusters Berkeley 15 (=OCl 414), Czernik 18 (=OCl 426) and NGC 2401 (=OCl 588), obtained for the first time in UBVRI filters down to V=20 mag, are presented...

Polarization of line radiation in the presence of external electric quadrupole and uniform magnetic fields (2004)

Yee Yee Oo, Nagendra, K. N, Ananthamurthy, S, Vijayashankar, R, Ramachandran, G

The polarization of emission lines formed in a medium immersed in external electric and magnetic fields is studied. The electric field is assumed to be quadrupolar in nature, while the magnetic field...

Collective Motional Resonances and Instabilities of an Electron Cloud Stored in a Penning Trap (2002)

Biswas, D., Paasche, P., Valenzuela, T., Angelescu, C., Ananthamurthy, S.

We have experimentally investigated the behaviour of an electron cloud confined in a Penning trap at weak superimposed magnetic fields. Exciting the motional frequencies of the electrons by an...