Pasi Hakala
 


pahakala@utu.fi

Vesilinnantie 5

Turku

  
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  • A Link Between White Dwarf Pulsars and Polars: Multiwavelength Observations of the 9.36-minute Period Variable Gaia22ayj  (2025)  
    • Publications of the Astronomical Society of the Pacific
     Rodriguez, Antonio C.; El-Badry, Kareem; Hakala, Pasi; Rodriguez-Gil, Pablo; Bao, Tong; Galiullin, Ilkham; Kurlander, Jacob A.; Law, Casey J.; Pelisoli, Ingrid; Schreiber, Matthias R.; Burdge, Kevin; Caiazzo, Ilaria; van Roestel, Jan; Szkody, Paula; Drake, Andrew J.; Buckley, David A. H.; Potter, Stephen B.; Gaensicke, Boris; Mori, Kaya; Bellm, Eric C.; Kulkarni, Shrinivas R.; Prince, Thomas A.; Graham, Matthew; Kasliwal, Mansi M.; Rose, Sam; Sharma, Yashvi; Ahumada, Tomas; Anand, Shreya; Viitanen, Akke; Wold, Avery; Chen, Tracy X.; Riddle, Reed; Smith, Roger


  • Discovery of two new polars evolved past the period bounce  (2025)  
    • Monthly Notices of the Royal Astronomical Society
     Cunningham, Tim; Caiazzo, Ilaria; Sienkiewicz, Gracjan; Wheatley, Peter J.; Gänsicke, Boris T.; El-Badry, Kareem; Arcodia, Riccardo; Charbonneau, David; Connor, Liam; De, Kishalay; Hakala, Pasi; Kenyon, Scott J.; Maheshwari, Sumit Kumar; Rodriguez, Antonio C.; van Roestel, Jan; Tremblay, Pier-Emmanuel


  • Characterizing high and low accretion states in VY Scl CVs using ZTF and TESS dataErratum: Circular polarimetry of suspect wind-accreting magnetic pre-polars (vol 513, pg 3858, 2022)  (2024)  
    • Monthly Notices of the Royal Astronomical SocietyMonthly Notices of the Royal Astronomical Society
     Duffy, C.; Wu, Kinwah; Ramsay, G.; Wood, Matt A.; Mason, Paul A.; Hakala, Pasi; Steeghs, D.


  • Insights into the broadband emission of the TeV blazar Mrk 501 during the first X-ray polarization measurementsShort-duration accretion states of Polars as seen in TESS and ZTF data  (2024)  
    • Astronomy and Astrophysics
     Abe S., Abhir J., Acciari V.A., Aguasca-Cabot A., Agudo I., Aniello T., Ansoldi S., Antonelli L.A., Arbet Engels A., Arcaro C., Asano K., Babić A., Baquero A., Barres De Almeida U., Barrio J.A., Batković I., Bautista A., Baxter J., Becerra González J., Bednarek W., Bernardini E., Bernardos M., Bernete J., Berti A., Besenrieder J., Bigongiari C., Biland A., Blanch O., Bonnoli G., Bošnjak , Burelli I., Busetto G., Campoy-Ordaz A., Carosi A., Carosi R., Carretero-Castrillo M., Castro-Tirado A.J., Ceribella G., Chai Y., Cifuentes A., Colombo E., Contreras J.L., Cortina J., Covino S., D'Amico G., D'Elia V., Da Vela P., Dazzi F., De Angelis A., De Lotto B., De Menezes R., Del Popolo A., Delfino M., Delgado J., Delgado Mendez C., Di Pierro F., Di Venere L., Dominis Prester D., Donini A., Dorner D., Doro M., Elsaesser D., Emery G., Escudero J., Fariña L., Fattorini A., Foffano L., Font L., Fröse S., Fukazawa Y., García López R.J., Garczarczyk M., Gasparyan S., Gaug M., Giesbrecht Paiva J.G., Giglietto N., Giordano F., Gliwny P., Godinović N., Gradetzke T., Grau R., Green D., Green J.G., Günther P., Hadasch D., Hahn A., Hassan T., Heckmann L., Herrera J., Hrupec D., Hütten M., Imazawa R., Ishio K., Jiménez Martínez I., Kayanoki T., Kerszberg D., Kluge G.W., Kobayashi Y., Kouch P.M., Kubo H., Kushida J., Láinez Lezáun M., Lamastra A., Leone F., Lindfors E., Linhoff L., Lombardi S., Longo F., López-Coto R., López-Moya M., López-Oramas A., Loporchio S., Lorini A., Lyard E., MacHado De Oliveira Fraga B., Majumdar P., Makariev M., Maneva G., Mang N., Manganaro M., Mangano S., Mannheim K., Mariotti M., Martínez M., Martínez-Chicharro M., Mas-Aguilar A., Mazin D., Menchiari S., Mender S., Miceli D., Miener T., Miranda J.M., Mirzoyan R., Molero González M., Molina E., Mondal H.A., Moralejo A., Morcuende D., Nakamori T., Nanci C., Neustroev V., Nigro C., Nikolić L., Nilsson K., Nishijima K., Njoh Ekoume T., Noda K., Nozaki S., Ohtani Y., Okumura A., Otero-Santos J., Paiano S., Palatiello M., Paneque D., Paoletti R., Paredes J.M., Peresano M., Persic M., Pihet M., Pirola G., Podobnik F., Prada Moroni P.G., Prandini E., Principe G., Priyadarshi C., Rhode W., Ribó M., Rico J., Righi C., Sahakyan N., Saito T., Satalecka K., Saturni F.G., Schleicher B., Schmidt K., Schmuckermaier F., Schubert J.L., Schweizer T., Sciaccaluga A., Silvestri G., Sitarek J., Sobczynska D., Spolon A., Stamerra A., Strišković J., Strom D., Suda Y., Suutarinen S., Tajima H., Takahashi M., Takeishi R., Tavecchio F., Temnikov P., Terauchi K., Terzić T., Teshima M., Tosti L., Truzzi S., Tutone A., Ubach S., Van Scherpenberg J., Ventura S., Viale I., Vigorito C.F., Vitale V., Vovk I., Walter R., Will M., Wunderlich C., Yamamoto T., Liodakis I., Aceituno F.J., Agís-González B., Akitaya H., Bernardos M.I., Blinov D., Bourbah I.G., Casadio C., Casanova V., D'Ammando F., Fallah Ramazani V., Fernández-García E., Fukazawa Y., García-Comas M., Gau E., Gokus A., Gurwell M., Hakala P., Hovatta T., Hu Y.D., Husillos C., Jormanainen J., Jorstad S.G., Kawabata K.S., Keating G.K., Kiehlmann S., Kontopodis E., Krawczynski H., Lähteenmäki A., Leto C., Lisalda L., Mandarakas N., Marchini A., Marscher A.P., Max-Moerbeck W., Middei R., Mizuno T., Myserlis I., Nakaoka T., Perri M., Puccetti S., Rao R., Readhead A.C.S., Reeves R., Rodriguez Cavero N., Salomé Q., Sasada M., Skalidis R., Sota A., Syrjärinne I., Tornikoski M., Uemura M., Verrecchia F., Vervelaki A.


  • Searching for the stellar cycles of low-mass stars using TESS data  (2024)  
    • Astronomy and Astrophysics
     Ramsay, Gavin; Hakala, Pasi; Gerry, Doyle J.


  • TESS Photometry of AM Her and AR UMa: Binary Parameters, Cyclotron Emission Modeling, and Mass Transfer Duty CyclesThe puzzling story of flare inactive ultra fast rotating m dwarfs. I. exploring their magnetic fields  (2024)  
    • Astrophysical JournalMonthly Notices of the Royal Astronomical Society
     Mason Paul A., Hakala Pasi, Wu Kinwah, Barrett Paul E., Iłkiewicz Krystian, Littlefield Colin, Monroy Lorena C., Sezer Hasan C., Jablonski Francisco, Garnavich Peter, Szkody Paula, Ramsay Gavin, Duffy Christopher, Scaringi Simone


  • The mass of the white dwarf in YY Dra (=DO Dra): Dynamical measurement and comparative study with X-ray estimates  (2024)  
    • Astronomy and Astrophysics
     Álvarez-Hernández, A.; Torres, M. A. P.; Shahbaz, T.; Rodriguez-Gil, P.; Gazeas, K. D.; Sánchez-Sierras, J.; Jonker, P. G.; Corral-Santana, J. M.; Acosta-Pulido, J. A.; Hakala, P.


  • Dynamical mass of the white dwarf in XY Ari: a test for intermediate polar X-ray spectral modelsThe puzzling story of flare inactive ultra fast rotating M dwarfs. II. Searching for radial velocity variations  (2023)  
    • Monthly Notices of the Royal Astronomical SocietyMonthly Notices of the Royal Astronomical Society
     Álvarez-Hernández A., Torres M.A.P., Rodríguez-Gil P., Shahbaz T, Sánchez-Sierras J., Acosta-Pulido J.A., Jonker P.G., Gazeas K.D., Hakala P., Corral-Santana J.M.


  • Limiting the accretion disc light in two mass transferring hot subdwarf binariesCoBiToM project - I. Contact binaries towards merging  (2023)  
    • Monthly Notices of the Royal Astronomical SocietyMonthly Notices of the Royal Astronomical Society
     Deshmukh Kunal, Kupfer Thomas, Hakala Pasi, Bauer Evan B, Berdyugin Andrei, Bildsten Lars, Marsh Thomas R, Mereghetti Sandro, Piirola Vilppu


  • Two decades of optical timing of the shortest-period binary star system HM Cancri  (2023)  
    • Monthly Notices of the Royal Astronomical Society
     Munday James, Marsh T R, Hollands Mark, Pelisoli Ingrid, Steeghs Danny, Hakala Pasi, Breedt Elmé, Brown Alex, Dhillon V S, Dyer Martin J, Green Matthew, Kerry Paul, Littlefair S P, Parsons Steven G, Sahman Dave, Somjit Sorawit, Sukaum Boonchoo, Wild James


  • A Magnetic Valve at L1 Revealed in TESS Photometry of the Asynchronous Polar BY Cam  (2022)  
    • Astrophysical Journal
     Mason Paul A, Littlefield Colin, Monroy Lorena C, Morales John F, Hakala Pasi, Garnavich Peter, Szkody Paula, Kennedy Mark R, Ramsay Gavin, Scaringi Simone


  • A TESS search for donor-star pulsations in high-mass X-ray binaries  (2022)  
    • Monthly Notices of the Royal Astronomical Society
     Ramsay Gavin, Hakala Pasi, Charles Philip A.


  • Circular polarimetry of suspect wind-accreting magnetic pre-polars  (2022)  
    • Monthly Notices of the Royal Astronomical Society
     Hakala Pasi, Parsons Steven G., Marsh Thomas R., Gansicke Boris T., Ramsay Gavin, Schwope Axel, Hermes J. J.


  • CoBiToM Project - II: Evolution of contact binary systems close to the orbital period cut-off  (2022)  
    • Monthly Notices of the Royal Astronomical Society
     Loukaidou G. A., Gazeas K. D., Palafouta S., Athanasopoulos D., Zola S., Liakos A., Niarchos P. G., Hakala P., Essam A., Hatzidimitriou D.


  •   (2022)  
       Hakala Pasi, Parsons Steven G., Marsh Thomas R., Gansicke Boris T., Ramsay Gavin, Schwope Axel, Hermes J.J.


    •   (2022)  
      • Monthly Notices of the Royal Astronomical Society
       Duffy C, Ramsay G, Wu K, Mason PA, Hakala P, Steeghs D, Wood MA


    • 2022
         Doyle Lauren, Bagnulo Stefano, Ramsay Gavin, Doyle J. Gerry, Hakala Pasi


      •   (2022)  
           Ramsay Gavin, Hakala Pasi, Doyle J. Gerry, Doyle Lauren, Bagnulo Stefano


        •   (2021)  
             Gazeas KD, Loukaidou GA, Niarchos PG, Palafouta S, Athanasopoulos D, Liakos A, Zola S, Essam A, Hakala P


          • Detection of an energetic flare from the M5V secondary star in the Polar MQ Dra  (2021)  
            • Monthly Notices of the Royal Astronomical Society
             Ramsay Gavin, Hakala Pasi, Wood Matt A



          Last updated on 2023-12-07 at 12:43