Zobrazeno 1 - 10
of 202
pro vyhledávání: '"S., Silpa"'
Autor:
Girdhar, A., Harrison, C. M., Mainieri, V., Aranda, R. Fernández, Alexander, D. M., Battaia, F. Arrigoni, Bianchin, M., Rivera, G. Calistro, Circosta, C., Costa, T., Edge, A. C., Farina, E. P., Kakkad, D., Kharb, P., Molyneux, S. J., Mukherjee, D., Njeri, A., S., Silpa, Venturi, G., Ward, S. R.
We present a study of molecular gas, traced via CO (3-2) from ALMA data, of four z< 0.2, `radio quiet', type 2 quasars (log [L(bol)/(erg/s)] = 45.3 - 46.2; log [L(1.4 GHz)/(W/Hz)] = 23.7 - 24.3). Targets were selected to have extended radio lobes (>=
Externí odkaz:
http://arxiv.org/abs/2311.03453
Autor:
Molyneux, S. J., Rivera, G. Calistro, De Breuck, C., Harrison, C. M., Mainieri, V., Lundgren, A., Kakkad, D., Circosta, C., Girdhar, A., Costa, T., Mullaney, J. R., Kharb, P., Battaia, F. Arrigoni, Farina, E. P., Alexander, D. M., Ward, S. R., S., Silpa, Smit, R.
We present a comprehensive study of the molecular gas properties of 17 Type 2 quasars at $z <$ 0.2 from the Quasar Feedback Survey (L$_{[OIII]}$ > $10^{42.1}$ $\rm ergs^{-1}$), selected by their high [OIII] luminosities and displaying a large diversi
Externí odkaz:
http://arxiv.org/abs/2310.10235
We present here uGMRT band 4 (~650MHz) polarization images of 8 BL~Lac objects belonging to the Palomar-Green (PG) `blazar' sample. A large fraction of the sources (~63%) reveal core-halo radio structures with most of the polarization detected in the
Externí odkaz:
http://arxiv.org/abs/2310.08989
Publikováno v:
New J. Phys. 26, 073036 (2024)
We report experimental measurements showing how one can combine quantum interference and thermal Doppler shifts at room temperature to detect weak magnetic fields. We pump ${}^{87}$Rb atoms to a highly-excited, Rydberg level using a probe and a coupl
Externí odkaz:
http://arxiv.org/abs/2308.05190
With high-sensitivity kiloparsec-scale radio polarimetry, we can examine the jet-medium interactions and get a better understanding of the blazar divide in radio-loud (RL) AGN. We are analyzing the radio polarimetric observations with the EVLA and GM
Externí odkaz:
http://arxiv.org/abs/2304.11831
We present polarization-sensitive images from the Karl G. Jansky Very Large Array (VLA) at 5 GHz of 11 radio-quiet PG quasars. Based on the radio morphology, spectral index and polarization properties from the VLA study, coupled with the findings of
Externí odkaz:
http://arxiv.org/abs/2301.07929
Autor:
Rao, Vaishnav V., Kharb, Preeti, K., Rubinur, S., Silpa, Roy, Namrata, Sebastian, Biny, Singh, Veeresh, Baghel, Janhavi, Manna, Souvik, Ishwara-Chandra, C. H.
The Seyfert galaxy NGC 2639 was known to exhibit three episodes of AGN jet/lobe activity. We present here the upgraded Giant Metrewave Radio Telescope (uGMRT) 735 MHz image of NGC 2639 showing a fourth episode as witnessed by the discovery of $\sim9$
Externí odkaz:
http://arxiv.org/abs/2301.01610
We present polarization images of 9 radio-loud (RL) quasars from the VLA B-array at 6 GHz. These quasars belong to the Palomar-Green (PG) "blazar" sample comprising 16 RL quasars and 8 BL Lac objects. Extensive polarization is detected in the cores,
Externí odkaz:
http://arxiv.org/abs/2212.07061
Publikováno v:
Optics Continuum Vol 1 (5), 1176-1192 (2022)
We report our measurements of the absolute transition frequencies of 5P_3/2,F = 3 to nS and nD Rydberg states of 87Rb with high principal quantum numbers in a wide range of values (n = 45-124). The measurements were performed using Rydberg Electromag
Externí odkaz:
http://arxiv.org/abs/2203.04852
The dominant radio emission mechanism in radio-quiet quasars (RQQs) is an open question. Primary contenders include: low-power radio jets, winds, star-formation and coronal emission. Our work suggests that radio polarization and emission-line studies
Externí odkaz:
http://arxiv.org/abs/2201.03877