Application of 3D U-Net Neural Networks in Extracting the Epoch of Reionization Signal from SKA-Low Observations Based on Real Observations of NCP Field from LOFAR

Authors: Gao, Li-Yang, Koopmans, Léon V. E., Mertens, Florent G., Munshi, Satyapan, Li, Yichao, Brackenhoff, Stefanie A., Ceccotti, Emilio, Chege, J. Kariuki, Acharya, Anshuman, Ghara, Raghunath, Giri, Sambit K., Iliev, Ilian T., Mellema, Garrelt, Zhang, Xin

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology

Access URL: http://arxiv.org/abs/2412.16853

Revised LOFAR upper limits on the 21-cm signal power spectrum at $\mathbf{z\approx9.1}$ using Machine Learning and Gaussian Process Regression

Authors: Acharya, Anshuman, Mertens, Florent, Ciardi, Benedetta, Ghara, Raghunath, Koopmans, Léon V. E., Zaroubi, Saleem

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2408.10051

Probing the intergalactic medium during the Epoch of Reionization using 21-cm signal power spectra

Authors: Ghara, Raghunath, Shaw, Abinash Kumar, Zaroubi, Saleem, Ciardi, Benedetta, Mellema, Garrelt, Koopmans, Léon V. E., Acharya, Anshuman, Choudhury, Madhurima, Giri, Sambit K., Iliev, Ilian T., Ma, Qing-Bo, Mertens, Florent

Source: A&A 687, A252 (2024)

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2404.11686

Retrieving the 21-cm signal from the Epoch of Reionization with learnt Gaussian process kernels

Authors: Mertens, Florent G., Bobin, Jérôme, Carucci, Isabella P.

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

Access URL: http://arxiv.org/abs/2307.13545

Deep learning approach for identification of HII regions during reionization in 21-cm observations -- II. foreground contamination

Authors: Bianco, Michele, Giri, Sambit. K., Prelogović, David, Chen, Tianyue, Mertens, Florent G., Tolley, Emma, Mesinger, Andrei, Kneib, Jean-Paul

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

Access URL: http://arxiv.org/abs/2304.02661

Studying the Multi-frequency Angular Power Spectrum of the Cosmic Dawn 21-cm Signal

Authors: Shaw, Abinash Kumar, Ghara, Raghunath, Zaroubi, Saleem, Mondal, Rajesh, Mellema, Garrelt, Mertens, Florent, Koopmans, Léon V. E., Semelin, Benoît

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

Access URL: http://arxiv.org/abs/2302.01127

Accurate modelling of the Lyman-$\alpha$ coupling for the 21-cm signal, observability with NenuFAR and SKA

Authors: Semelin, Benoit, Mériot, Romain, Mertens, Florent, Koopmans, Léon V. E., Aubert, Dominique, Barkana, Rennan, Fialkov, Anastasia, Munshi, Satyapan, Ocvirk, Pierre

Source: A&A 672, A162 (2023)

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2301.13178

SKA-Low Intensity Mapping Pathfinder Updates: Deeper 21 cm Power Spectrum Limits from Improved Analysis Frameworks

Authors: Barry, Nichole, Bernardi, Gianni, Greig, Bradley, Kern, Nicholas, Mertens, Florent

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

Access URL: http://arxiv.org/abs/2110.06173

A detailed kinematic study of 3C 84 and its connection to Gamma-rays

Authors: Hodgson, Jeffrey A., Rani, Bindu, Oh, Junghwan, Marscher, Alan, Jorstad, Svetlana, Mizuno, Yosuke, Park, Jongho, Lee, Sang-Sung, Trippe, Sascha, Mertens, Florent

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

Access URL: http://arxiv.org/abs/2104.03081

21cm signal predictions at Cosmic Dawn and Reionization with coupled radiative-hydrodynamics

Authors: Gillet, Nicolas J. F., Aubert, Dominique, Mertens, Florent G., Ocvirk, Pierre

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2103.03061

Interpreting LOFAR 21-cm signal upper limits at z~9.1 in the context of high-z galaxy and reionisation observations

Authors: Greig, Bradley, Mesinger, Andrei, Koopmans, Léon V. E., Ciardi, Benedetta, Mellema, Garrelt, Zaroubi, Saleem, Giri, Sambit K., Ghara, Raghunath, Ghosh, Abhik, Iliev, Ilian T., Mertens, Florent G., Mondal, Rajesh, Offringa, André R., Pandey, Vishambhar N.

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2006.03203

Foreground modelling via Gaussian process regression: an application to HERA data

Authors: Ghosh, Abhik, Mertens, Florent, Bernardi, Gianni, Santos, Mário G., Kern, Nicholas S., Carilli, Christopher L., Grobler, Trienko L., Koopmans, Léon V. E., Jacobs, Daniel C., Liu, Adrian, Parsons, Aaron R., Morales, Miguel F., Aguirre, James E., Dillon, Joshua S., Hazelton, Bryna J., Smirnov, Oleg M., Gehlot, Bharat K., Matika, Siyanda, Alexander, Paul, Ali, Zaki S., Beardsley, Adam P., Benefo, Roshan K., Billings, Tashalee S., Bowman, Judd D., Bradley, Richard F., Cheng, Carina, Chichura, Paul M., DeBoer, David R., Acedo, Eloy de Lera, Ewall-Wice, Aaron, Fadana, Gcobisa, Fagnoni, Nicolas, Fortino, Austin F., Fritz, Randall, Furlanetto, Steve R., Gallardo, Samavarti, Glendenning, Brian, Gorthi, Deepthi, Greig, Bradley, Grobbelaar, Jasper, Hickish, Jack, Josaitis, Alec, Julius, Austin, Igarashi, Amy S., Kariseb, MacCalvin, Kohn, Saul A., Kolopanis, Matthew, Lekalake, Telalo, Loots, Anita, MacMahon, David, Malan, Lourence, Malgas, Cresshim, Maree, Matthys, Martinot, Zachary E., Mathison, Nathan, Matsetela, Eunice, Mesinger, Andrei, Neben, Abraham R., Nikolic, Bojan, Nunhokee, Chuneeta D., Patra, Nipanjana, Pieterse, Samantha, Razavi-Ghods, Nima, Ringuette, Jon, Robnett, James, Rosie, Kathryn, Sell, Raddwine, Smith, Craig, Syce, Angelo, Tegmark, Max, Thyagarajan, Nithyanandan, Williams, Peter K. G., Zheng, Haoxuan

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/2004.06041

Peering into the Dark (Ages) with Low-Frequency Space Interferometers

Authors: Koopmans, Leon, Barkana, Rennan, Bentum, Mark, Bernardi, Gianni, Boonstra, Albert-Jan, Bowman, Judd, Burns, Jack, Chen, Xuelei, Datta, Abhirup, Falcke, Heino, Fialkov, Anastasia, Gehlot, Bharat, Gurvits, Leonid, Jelić, Vibor, Klein-Wolt, Marc, Koopmans, Léon, Lazio, Joseph, Meerburg, Daan, Mellema, Garrelt, Mertens, Florent, Mesinger, Andrei, Offringa, André, Pritchard, Jonathan, Semelin, Benoit, Subrahmanyan, Ravi, Silk, Joseph, Trott, Cathryn, Vedantham, Harish, Verde, Licia, Zaroubi, Saleem, Zarka, Philippe

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/1908.04296

Global millimeter VLBI array survey of ultracompact extragalactic radio sources at 86 GHz

Authors: Nair, Dhanya G., Lobanov, Andrei P., Krichbaum, Thomas P., Ros, Eduardo, Zensus, J. Anton, Kovalev, Yuri Y., Lee, Sang-Sung, Mertens, Florent, Hagiwara, Yoshiaki, Bremer, Michael, Lindqvist, Michael, de Vicente, Pablo

Source: A&A 622, A92 (2019)

Subject Terms: Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/1808.09243

Deconvolving the Wedge: Maximum-Likelihood Power Spectra via Spherical-Wave Visibility Modeling

Authors: Ghosh, Abhik, Mertens, Florent, Koopmans, Leon V. E.

Subject Terms: Astrophysics - Cosmology and Nongalactic Astrophysics

Access URL: http://arxiv.org/abs/1709.06752

Observations of the Structure and Dynamics of the Inner M87 Jet

Authors: Walker, R. Craig, Hardee, Philip E., Davies, Fred, Ly, Chun, Junor, William, Mertens, Florent, Lobanov, Andrei

Source: Galaxies 2016, 4(4), 46

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

Access URL: http://arxiv.org/abs/1610.08600

Longitudinal and transverse velocity fields in parsec-scale jets

Authors: Mertens, Florent, Lobanov, Andrei

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/1505.06951

Revised LOFAR upper limits on the 21-cm signal power spectrum at z ≈ 9.1 using machine learning and gaussian process regression.

Authors: Acharya, Anshuman¹ (AUTHOR) anshuman@mpa-garching.mpg.de, Mertens, Florent² (AUTHOR), Ciardi, Benedetta¹ (AUTHOR), Ghara, Raghunath^3,4 (AUTHOR), Koopmans, Léon V E⁵ (AUTHOR), Zaroubi, Saleem^5,6 (AUTHOR)

Source: Monthly Notices of the Royal Astronomical Society: Letters. Oct2024, Vol. 534 Issue 1, pL30-L34. 5p.

Subject Terms: *KRIGING, *POWER spectra, *MACHINE learning, *MIDDLE Ages, *STAR observations

Wavelet-based decomposition and analysis of structural patterns in astronomical images

Authors: Mertens, Florent, Lobanov, Andrei

Source: A&A 574, A67 (2015)

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/1410.3732

Deep learning approach for identification of H ii regions during reionization in 21-cm observations – II. Foreground contamination.

Authors: Bianco, Michele^1,2, mbianco@protonmail.com, Giri, Sambit K^3,4, Prelogović, David⁵, Chen, Tianyue¹, Mertens, Florent G⁶, Tolley, Emma¹, Mesinger, Andrei⁵, Kneib, Jean-Paul¹

Source: Monthly Notices of the Royal Astronomical Society; Mar2024, Vol. 528 Issue 3, p5212-5230, 19p