Radio Astronomy
Radio Astronomy is studied by Anne Lähteenmäki Group that is part of the Department of Electronics and Nanoengineering, Aalto University. The group is located in the Metsähovi Radio Observatory.
Radio telescopes are used to probe the sky at radio frequencies. The objects detected range from the Sun to the most distant of all radio sources in the universe, the cosmic microwave background (CMB). Radio frequencies penetrate even the thickest of dust clouds in the Galaxy, and allow us to see what is behind them. For example, the best way to map the structure of the Galaxy is to observe the abundant neutral hydrogen at 1.4 GHz (=21 cm). For more information on radio astronomical observations, see information on research projects at Metsähovi Radio Observatory.
Group members
Latest publications
Spatially resolved polarization swings in the supermassive binary black hole candidate OJ 287 with first Event Horizon Telescope observations
José L. Gómez, Ilje Cho, Efthalia Traianou, Thomas P. Krichbaum, Guang Yao Zhao, Rocco Lico, Antonio Fuentes, Marianna Foschi, Rohan Dahale, Boris Georgiev, Kotaro Moriyama, Maciek Wielgus, Roman Gold, Dominic W. Pesce, Hendrik Müller, Svetlana Jorstad, Teresa Toscano, Jan Röder, José M. Martí, Manel Perucho, Yuri Y. Kovalev, Stefanie Komossa, Achamveedu Gopakumar, Mauri J. Valtonen, Gabriele Bruni, Sunil Chandra, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Britton Jeter, Venkatessh Ramakrishnan, Tuomas Savolainen, Kaj Wiik
2026
Astronomy and Astrophysics
Probing jet base emission of M87* with the 2021 Event Horizon Telescope observations
Hendrik Müller, Sebastiano D. Von Fellenberg, Paul Tiede, Michael Janssen, Lindy Blackburn, Avery E. Broderick, Erandi Chavez, Boris Georgiev, Thomas P. Krichbaum, Kotaro Moriyama, Dhanya G. Nair, Iniyan Natarajan, Jongho Park, Andrew Thomas West, Maciek Wielgus, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Douglas F. Carlos, John E. Carlstrom, Britton Jeter, Georgios Filippos Paraschos, Venkatessh Ramakrishnan, Tuomas Savolainen, Jasmin E. Washington, Kaj Wiik
2026
Astronomy and Astrophysics
Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations
K. Abe, S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, A. Aguasca-Cabot, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, C. Arcaro, K. Asano, D. Baack, A. Babiäa, U. Barres De Almeida, J. A. Barrio, I. Batkoviäa, A. Bautista, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, E. Bronzini, I. Burelli, A. Campoy-Ordaz, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, D. Cerasole, G. Ceribella, Y. Chai, A. Cifuentes, J. Jormanainen, S. Kankkunen, P. M. Kouch, E. Lindfors, J. M. Miranda, M. Will, M. Aller, A. Lähteenmäki, M. Tornikoski
2025
Astronomy & Astrophysics
Multiwavelength study of OT 081: broadband modelling of a transitional blazar
H. Abe, S. Abe, V. A. Acciari, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, C. Arcaro, M. Artero, K. Asano, D. Baack, A. Babić, A. Baquero, U. Barres de Almeida, I. Batković, J. Baxter, E. Bernardini, M. Bernardos, J. Bernete, A. Berti, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, I. Burelli, G. Busetto, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, Y. Chai, A. Cifuentes, S. Cikota, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, J. Jormanainen, S. Suutarinen, V. Fallah Ramazani, T. Hovatta, A. Lähteenmäki, M. Tornikoski
2025
Monthly Notices of the Royal Astronomical Society
Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020
S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, A. Aguasca-Cabot, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, C. Arcaro, M. Artero, K. Asano, D. Baack, A. Babić, U. Barres De Almeida, J. A. Barrio, I. Batković, A. Bautista, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, E. Bronzini, I. Burelli, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, J. Jormanainen, S. Kankkunen, P. M. Kouch, E. Lindfors, J. M. Miranda, M. Will, V. Fallah Ramazani, T. Hovatta, S. Kiehlmann, A. Lähteenmäki, M. Tornikoski, W. Zheng
2025
Astronomy & Astrophysics
Very high-energy gamma-ray detection and long-term multiwavelength view of the flaring blazar B2 1811+31
K. Abe, S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, A. Aguasca-Cabot, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, C. Arcaro, K. Asano, A. Babić, U. Barres de Almeida, J. A. Barrio, L. Barrios-Jiménez, I. Batković, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, E. Bronzini, I. Burelli, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, D. Cerasole, G. Ceribella, A. Chilingarian, A. Cifuentes, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, J. Jormanainen, S. Kankkunen, P. M. Kouch, V. Fallah Ramazani, T. Hovatta
2025
Astronomy & Astrophysics
Horizon-scale variability of M87* from 2017–2021 EHT observations
Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Douglas F. Carlos, John E. Carlstrom, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Erandi Chavez, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Paul Chichura, Ilje Cho, Pierre Christian, Britton Jeter, Dong Jin Kim, Zhiyuan Li, Venkatessh Ramakrishnan, Tuomas Savolainen, Jan Wagner, Jasmin E. Washington, Kaj Wiik
2025
Astronomy & Astrophysics
The persistent shadow of the supermassive black hole of M87: II. Model comparisons and theoretical interpretations
Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, Thomas M. Crawford, Geoffrey B. Crew, Dong Jin Kim, Zhiyuan Li, Venkatessh Ramakrishnan, Tuomas Savolainen, Jan Wagner, Jasmin E. Washington, Kaj Wiik
2025
Astronomy & Astrophysics
Long term multi-wavelength analysis of the flat spectrum radio quasar OP 313
C. Bartolini, E. Angelakis, E. Bissaldi, D. Cerasole, F. D’Ammando, L. Di Venere, F. Giacchino, F. Giordano, M. Giroletti, A. Lähteenmäki, E. Lindfors, I. Myserlis, S. Loporchio, M. Tornikoski
2025
Il Nuovo Cimento C
Long-term multi-wavelength analysis of the FSRQ OP 313
C. Bartolini, E. Lindfors, M. Giroletti, A. Tramacere, F. Giacchino, F. Casaburo, D. Cerasole, I. Myserlis, A. Lähteenmäki, M. Tornikoski, F. D’Ammando, N. Marchili, S. Righini, E. Angelakis, A. Kraus, R. Rao, M. Gurwell, G. Keating, I. Agudo, A. Marscher, S. Jorstad, E. Bissaldi, L. Di Venere, F. Giordano, S. Loporchio
2025
Proceedings of Science
Contact:
Associate Professor Anne Lähteenmäki
Email: anne.lahteenmaki at aalto.fi
Tel.: +358 50 4419 492
Postal address:
Department of Electronics and Nanoengineering
Aalto University Metsähovi Radio Observatory
P.O. Box 13000, 00076 Aalto, Finland
Visiting address:
Metsähovi Radio Observatory
Metsähovintie 114, 02540 Kylmälä