Searching for a Signature of Turnaround in Galaxy Clusters with Convolutional Neural Networks

Authors: Triantafyllou, Nikolaos, Korkidis, Giorgos, Pavlidou, Vasiliki, Bonfini, Paolo

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2412.13304

The WALOP-North Instrument I: Optical Design, Filter Design, Calibration

Authors: Kypriotakis, John A., Maharana, Siddharth, Anche, Ramya M., Rajarshi, Chaitanya V., Ramaprakash, A. N., Joshi, Bhushan, Basyrov, Artem, Blinov, Dmitry, Ghosh, Tuhin, Gjerlow, Eirik, Kiehlmann, Sebastian, Mandarakas, Nikolaos, Panopoulou, Georgia V., Papadaki, Katerina, Pavlidou, Vasiliki, Pearson, Timothy J., Pelgrims, Vincent, Potter, Stephen B., Readhead, Anthony C. S., Skalidis, Raphael, Tassis, Konstantinos

Source: J. Astron. Telesc. Instrum. Syst. 10(4) 044005 (30 October 2024)

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2412.00964

Improving polarimetric accuracy of RoboPol to $<$ 0.05 % using a half-wave plate calibrator system

Authors: Maharana, Siddharth, Blinov, Dmitry, Ramaprakash, A. N., Pavlidou, Vasiliki, Tassis, Konstantinos

Source: Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130963A (2024)

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/2407.13470

PKS 2131-021 -- Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary

Authors: Kiehlmann, Sebastian, De La Parra, Philipe Vergara, Sullivan, Andrew, Synani, A., Liodakis, Ioannis, Readhead, Anthony, Graham, Matthew, Begelman, Mitchell, Blandford, Roger, Chatziioannou, Katerina, Ding, Yuanze, Harrison, Fiona, Homan, D., Hovatta, Talvikki, Kulkarni, Shrinivas, Lister, Matthew, Maiolino, Roberto, Max-Moerbeck, Walter, Molina, B., Mroz, Przemyslaw, O'Dea, Christopher, Pavlidou, Vasiliki, Pearson, Timothy J., Aller, Margo, Lawrence, C., Lazio, T. Joseph, O'Neill, S., Prince, Thomas, Ravi, Vikram, Reeves, Rodrigo, Tassis, Konstantinos, Vallisneri, Michele, Zensus, J.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2407.09647

Systems design, assembly, integration and lab testing of WALOP-South Polarimeter

Authors: Maharana, Siddharth, Ramaprakash, A. N., Rajarshi, Chaitanya, Khodade, Pravin, Joshi, Bhushan, Chordia, Pravin, Kohok, Abhay, Anche, Ramya M., Modi, Deepa, Kypriotakis, John A., Deokar, Amit, Kinjawadekar, Aditya, Potter, Stephen B., Blinov, Dmitry, Eriksen, Hans Kristian, Falalaki, Myrto, Gajjar, Hitesh, Ghosh, Tuhin, Gjerløw, Eirik, Kiehlmann, Sebastain, Liodakis, Ioannis, Mandarakas, Nikolaos, Panopoulou, Georgia V., Pavlidou, Vasiliki, Pearson, Timothy J., Pelgrims, Vincent, Readhead, Anthony C. S., Skalidis, Raphael, Tassis, Konstantinos, Uppal, Namita, Wehus, Ingunn K.

Source: Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130967P (2024)

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/2406.19428

Reconstructing the Magnetic Field in an Arbitrary Domain via Data-driven Bayesian Methods and Numerical Simulations

Authors: Pavlou, Georgios E., Pavlidou, Vasiliki, Harmandaris, Vagelis

Subject Terms: Physics - Computational Physics, Astrophysics - High Energy Astrophysical Phenomena, Mathematics - Numerical Analysis

Access URL: http://arxiv.org/abs/2404.15745

What can cosmic-ray knees reveal about source populations?

Authors: Falalaki, Myrto, Pavlidou, Vasiliki

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2404.15097

Hubble Expansion Signature on Simulated Halo Density Profiles: A Path to Observing the Turnaround Radius

Authors: Korkidis, Giorgos, Pavlidou, Vasiliki

Source: A&A 694, A139 (2025)

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2404.11183

Non-parametric Bayesian reconstruction of Galactic magnetic fields using Information Field Theory: The inclusion of line-of-sight information in ultra-high energy cosmic ray backtracking

Authors: Tsouros, Alexandros, Bendre, Abhijit B., Edenhofer, Gordian, Enßlin, Torsten, Frank, Philipp, Mastorakis, Michalis, Pavlidou, Vasiliki

Source: A&A 690, A102 (2024)

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2403.05531

Mass scaling relations for dark halos from an analytic universal outer density profile

Authors: Korkidis, Giorgos, Pavlidou, Vasiliki

Source: A&A 690, A71 (2024)

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2402.18634

Turnaround density evolution encodes cosmology in simulations

Authors: Korkidis, Giorgos, Pavlidou, Vasiliki, Tassis, Konstantinos

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2304.14434

Reconstructing Galactic magnetic fields from local measurements for backtracking ultra-high-energy cosmic rays

Authors: Tsouros, Alexandros, Edenhofer, Gordian, Enßlin, Torsten, Mastorakis, Michalis, Pavlidou, Vasiliki

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2303.10099

Discriminating power of milli-lensing observations for dark matter models

Authors: Loudas, Nick, Pavlidou, Vasiliki, Casadio, Carolina, Tassis, Kostas

Source: A&A 668, A166 (2022)

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2209.13393

WALOP-South: A Four-Camera One-Shot Imaging Polarimeter for PASIPHAE Survey. Paper II -- Polarimetric Modelling and Calibration

Authors: Maharana, Siddharth, Anche, Ramya M., Ramaprakash, A. N., Joshi, Bhushan, Basyrov, Artem, Blinov, Dmitry, Casadio, Carolina, Deka, Kishan, Eriksen, Hans Kristian, Ghosh, Tuhin, Gjerløw, Eirik, Kypriotakis, John A., Kiehlmann, Sebastian, Mandarakas, Nikolaos, Panopoulou, Georgia V., Papadaki, Katerina, Pavlidou, Vasiliki, Pearson, Timothy J., Pelgrims, Vincent, Potter, Stephen B., Readhead, Anthony C. S., Skalidis, Raphael, Svalheim, Trygve Leithe, Tassis, Konstantinos, Wehus, Ingunn K.

Source: J. of Astronomical Telescopes, Instruments, and Systems, 8(3), 038004 (2022)

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/2208.12441

Dancing with the stars: Stirring up extraordinary turbulence in Galactic center clouds

Authors: Tassis, Konstantinos, Pavlidou, Vasiliki

Source: A&A 662, L1 (2022)

Subject Terms: Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics

Access URL: http://arxiv.org/abs/2205.06820

WALOP-South: A wide-field one-shot linear optical polarimeter for PASIPHAE survey

Authors: Maharana, Siddharth, Kypriotakis, John A., Ramaprakash, A. N., Khodade, Pravin, Rajarshi, Chaitanya, Joshi, Bhushan S., Chordia, Pravin, Anche, Ramya M., Mishra, Shrish, Blinov, Dmitry, Eriksen, Hans Kristian, Ghosh, Tuhin, Gjerløw, Eirik, Mandarakas, Nikolaos, Panopoulou, Georgia V., Pavlidou, Vasiliki, Pearson, Timothy J., Pelgrims, Vincent, Potter, Stephen B., Readhead, Anthony C. S., Skalidis, Raphail, Tassis, Konstantinos, Wehus, Ingunn K.

Source: Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114475E (2020)

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/2102.09519

WALOP-South: A Four Camera One Shot Imaging Polarimeter for PASIPHAE Survey. Paper I -- Optical Design

Authors: Maharana, Siddharth, Kypriotakis, John A., Ramaprakash, A. N., Rajarshi, Chaitanya, Anche, Ramya M., Shrish, Blinov, Dmitry, Eriksen, Hans Kristian, Ghosh, Tuhin, Gjerløw, Eirik, Mandarakas, Nikolaos, Panopoulou, Georgia V., Pavlidou, Vasiliki, Pearson, Timothy J., Pelgrims, Vincent, Potter, Stephen B., Readhead, Anthony C. S., Skalidis, Raphael, Tassis, Konstantinos, Wehus, Ingunn K.

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/2102.09505

Turnaround density as a probe of the cosmological constant

Authors: Pavlidou, Vasiliki, Korkidis, Giorgos, Tomaras, Theodore, Tanoglidis, Dimitrios

Source: A&A 638, L8 (2020)

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2004.04395

Turnaround radius of galaxy clusters in N-body simulations

Authors: Korkidis, Giorgos, Pavlidou, Vasiliki, Tassis, Konstantinos, Ntormousi, Evangelia, Tomaras, Theodore N., Kovlakas, Konstantinos

Source: A&A 639, A122 (2020)

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/1912.08216

The RoboPol Program: Optical Polarimetric Monitoring of Blazars

Authors: Blinov, Dmitry, Pavlidou, Vasiliki

Source: Galaxies 2019, 7(2), 46

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/1904.05223