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Vilppu Piirola - Publications

Affiliations: 
1975 University of Turku, Åbo, Finland 
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51 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2022 Poutanen J, Veledina A, Berdyugin AV, Berdyugina SV, Jermak H, Jonker PG, Kajava JJE, Kosenkov IA, Kravtsov V, Piirola V, Shrestha M, Perez Torres MAP, Tsygankov SS. Black hole spin-orbit misalignment in the x-ray binary MAXI J1820+070. Science (New York, N.Y.). 375: 874-876. PMID 35201859 DOI: 10.1126/science.abl4679  0.769
2020 Kosenkov IA, Veledina A, Berdyugin AV, Kravtsov V, Piirola V, Berdyugina SV, Sakanoi T, Kagitani M, Poutanen J. Disc and wind in black hole X-ray binary MAXI J1820+070 observed through polarized light during its 2018 outburst Monthly Notices of the Royal Astronomical Society: Letters. 496: L96-L100. DOI: 10.1093/Mnrasl/Slaa096  0.681
2020 Piirola V, Berdyugin A, Frisch PC, Kagitani M, Sakanoi T, Berdyugina S, Cole AA, Harlingten C, Hill K. High-precision polarimetry of nearby stars (d < 50 pc) Astronomy & Astrophysics. 635: A46. DOI: 10.1051/0004-6361/201937324  0.804
2019 Valtonen MJ, Zola S, Pihajoki P, Enestam S, Lehto HJ, Dey L, Gopakumar A, Drozdz M, Ogloza W, Zejmo M, Gupta AC, Pursimo T, Ciprini S, Kidger M, Nilsson K, ... ... Piirola V, et al. Accretion Disk Parameters Determined from the Great 2015 Flare of OJ 287 The Astrophysical Journal. 882: 88. DOI: 10.3847/1538-4357/Ab3573  0.762
2019 Dey L, Gopakumar A, Valtonen M, Zola S, Susobhanan A, Hudec R, Pihajoki P, Pursimo T, Berdyugin A, Piirola V, Ciprini S, Nilsson K, Jermak H, Kidger M, Komossa S. The Unique Blazar OJ 287 and Its Massive Binary Black Hole Central Engine Universe. 5: 108. DOI: 10.3390/Universe5050108  0.691
2019 Veledina A, Berdyugin AV, Kosenkov IA, Kajava JJE, Tsygankov SS, Piirola V, Berdyugina SV, Sakanoi T, Kagitani M, Kravtsov V, Poutanen J. Evolving optical polarisation of the black hole X-ray binary MAXI J1820+070 Astronomy & Astrophysics. 623: A75. DOI: 10.1051/0004-6361/201834140  0.677
2018 Dey L, Valtonen MJ, Gopakumar A, Zoła S, Hudec R, Pihajoki P, Ciprini S, Matsumoto K, Sadakane K, Kidger M, Nilsson K, Mikkola S, Sillanpää A, Takalo LO, Lehto HJ, ... ... Piirola V, et al. Authenticating the presence of a relativistic massive black hole binary in OJ 287 using its general relativity centenary flare: improved orbital parameters The Astrophysical Journal. 866: 11. DOI: 10.3847/1538-4357/Aadd95  0.75
2018 Goyal A, Stawarz Ł, Zola S, Marchenko V, Soida M, Nilsson K, Ciprini S, Baran A, Ostrowski M, Wiita PJ, Gopal-Krishna, Siemiginowska A, Sobolewska M, Jorstad S, Marscher A, ... ... Piirola V, et al. Stochastic Modeling of Multiwavelength Variability of the Classical BL Lac Object OJ 287 on Timescales Ranging from Decades to Hours The Astrophysical Journal. 863: 175. DOI: 10.3847/1538-4357/Aad2De  0.536
2018 Berdyugin A, Piirola V, Sakanoi T, Kagitani M, Yoneda M. High-precision broad-band linear polarimetry of early-type binaries Astronomy & Astrophysics. 611: A69. DOI: 10.1051/0004-6361/201732163  0.678
2018 Harvey EJ, Redman MP, Darnley MJ, Williams SC, Berdyugin A, Piirola VE, Fitzgerald KP, O’Connor EGP. Polarimetry and spectroscopy of the “oxygen flaring” DQ Herculis-like nova: V5668 Sagittarii (2015) Astronomy & Astrophysics. 611: A3. DOI: 10.1051/0004-6361/201731741  0.576
2017 Valtonen M, Zola S, Jermak H, Ciprini S, Hudec R, Dey L, Gopakumar A, Reichart D, Caton D, Gazeas K, Matsumoto K, Ogloza W, Drozdz M, Alicavus F, Baransky O, ... ... Piirola V, et al. Polarization and Spectral Energy Distribution in OJ 287 during the 2016/17 Outbursts Galaxies. 5: 83. DOI: 10.3390/GALAXIES5040083  0.661
2017 Kosenkov IA, Berdyugin AV, Piirola V, Tsygankov SS, Pallé E, Miles-Páez PA, Poutanen J. High-precision optical polarimetry of the accreting black hole V404 Cyg during the 2015 June outburst Monthly Notices of the Royal Astronomical Society. 468: 4362-4373. DOI: 10.1093/Mnras/Stx779  0.654
2016 Valtonen MJ, Zola S, Ciprini S, Gopakumar A, Matsumoto K, Sadakane K, Kidger M, Gazeas K, Nilsson K, Berdyugin A, Piirola V, Jermak H, Baliyan KS, Alicavus F, Boyd D, et al. Primary black hole spin in oj 287 AS determined by the general relativity centenary flare Astrophysical Journal Letters. 819. DOI: 10.3847/2041-8205/819/2/L37  0.716
2016 Frisch PC, Berdyugin AB, Piirola V, Magalhaes AM, Seriacopi DB, Ferrari T, Santos FP, Schwadron NA, Funsten HO, McComas DJ, Heiles CE. Following the interstellar magnetic field from the heliosphere into space with polarized starlight Journal of Physics: Conference Series. 767: 012010. DOI: 10.1088/1742-6596/767/1/012010  0.308
2016 Berdyugin A, Piirola V, Sadegi S, Tsygankov S, Sakanoi T, Kagitani M, Yoneda M, Okano S, Poutanen J. High-precision broad-band linear polarimetry of early-type binaries Astronomy & Astrophysics. 591: A92. DOI: 10.1051/0004-6361/201528020  0.71
2015 Frisch PC, Berdyugin A, Funsten HO, Magalhaes AM, McComas DJ, Piirola V, Schwadron NA, Seriacopi DB, Wiktorowicz SJ. Connecting the interstellar magnetic field at the heliosphere to the Loop i superbubble Journal of Physics: Conference Series. 577. DOI: 10.1088/1742-6596/577/1/012010  0.615
2015 Frisch PC, Berdyugin A, Piirola V, Magalhaes AM, Seriacopi DB, Wiktorowicz SJ, Andersson BG, Funsten HO, McComas DJ, Schwadron NA, Slavin JD, Hanson AJ, Fu CW. CHARTING the INTERSTELLAR MAGNETIC FIELD CAUSING the INTERSTELLAR BOUNDARY EXPLORER (IBEX) RIBBON of ENERGETIC NEUTRAL ATOMS Astrophysical Journal. 814. DOI: 10.1088/0004-637X/814/2/112  0.702
2015 Frisch PC, Andersson BG, Berdyugin A, Piirola V, Funsten HO, Magalhaes AM, Seriacopi DB, McComas DJ, Schwadron NA, Slavin JD, Wiktorowicz SJ. Evidence for an interstellar dust filament in the outer heliosheath Astrophysical Journal. 805. DOI: 10.1088/0004-637X/805/1/60  0.654
2014 Piirola V, Berdyugin A, Berdyugina S. DIPOL-2: a double image high precision polarimeter Proceedings of Spie. 9147. DOI: 10.1117/12.2055923  0.665
2013 Andersson BG, Piirola V, De Buizer J, Clemens DP, Uomoto A, Charcos-Llorens M, Geballe TR, Lazarian A, Hoang T, Vornanen T. Evidence for H2 formation driven dust grain alignment in IC 63 Astrophysical Journal. 775. DOI: 10.1088/0004-637X/775/2/84  0.397
2013 Berdyugin A, Piirola V, Teerikorpi P. Interstellar polarization at high galactic latitudes from distant stars Astronomy & Astrophysics. 561: A24. DOI: 10.1051/0004-6361:20020069  0.696
2012 Frisch PC, Andersson BG, Berdyugin A, Piirola V, Demajistre R, Funsten HO, Magalhaes AM, Seriacopi DB, McComas DJ, Schwadron NA, Slavin JD, Wiktorowicz SJ. The interstellar magnetic field close to the sun. II. Astrophysical Journal. 760. DOI: 10.1088/0004-637X/760/2/106  0.673
2011 Berdyugina SV, Berdyugin AV, Fluri DM, Piirola V. POLARIZED REFLECTED LIGHT FROM THE EXOPLANET HD189733b: FIRST MULTICOLOR OBSERVATIONS AND CONFIRMATION OF DETECTION The Astrophysical Journal. 728: L6. DOI: 10.1088/2041-8205/728/1/L6  0.67
2010 Vornanen T, Berdyugina SV, Berdyugin AV, Piirola V. Gj 841B—The Second Dq White Dwarf With Polarized Ch Molecular Bands The Astrophysical Journal. 720. DOI: 10.1088/2041-8205/720/1/L52  0.625
2010 Frisch PC, Andersson BG, Berdyugin A, Funsten HO, Magalhaes AM, McComas DJ, Piirola V, Schwadron NA, Slavin JD, Wiktorowicz SJ. Comparisons of the interstellar magnetic field directions obtained from the IBEX Ribbon and interstellar polarizations Astrophysical Journal. 724: 1473-1479. DOI: 10.1088/0004-637X/724/2/1473  0.673
2010 Katajainen S, Butters O, Norton AJ, Lehto HJ, Piirola V, Berdyugin A. DISCOVERY OF POLARIZED EMISSION FROM TWO SOFT X-RAY-EMITTING INTERMEDIATE POLARS: UU Col AND NY Lup The Astrophysical Journal. 724: 165-170. DOI: 10.1088/0004-637X/724/1/165  0.782
2009 Butters OW, Katajainen S, Norton AJ, Lehto HJ, Piirola V. Circular polarization survey of intermediate polars I. Northern targets in the range 17 h < RA < 23 h Astronomy & Astrophysics. 496: 891-902. DOI: 10.1051/0004-6361/200811058  0.745
2007 Berdyugina SV, Berdyugin AV, Piirola V. Molecular magnetic dichroism in spectra of white dwarfs. Physical Review Letters. 99: 091101. PMID 17930997 DOI: 10.1103/Physrevlett.99.091101  0.619
2007 Berdyugina SV, Berdyugin AV, Fluri DM, Piirola V. First Detection of Polarized Scattered Light from an Exoplanetary Atmosphere The Astrophysical Journal. 673: L83-L86. DOI: 10.1086/527320  0.666
2007 Katajainen S, Butters OW, Norton AJ, Lehto HJ, Piirola V. Discovery of polarized emission from the long period intermediate polar RX J2133.7+5107 Astronomy & Astrophysics. 475: 1011-1018. DOI: 10.1051/0004-6361:20077618  0.756
2006 Berdyugin AV, Berdyugina SV, Piirola V, Butkevich AG. The search for polarization variability in IM Pegasi Astrophysical Journal. 651: 475-480. DOI: 10.1086/507833  0.65
2006 Villar-Sbaffi A, St-Louis N, Moffat AFJ, Piirola V. An extreme case of a misaligned highly flattened wind in the wolf-rayet binary CX cephei Astrophysical Journal. 640: 995-1004. DOI: 10.1086/499224  0.477
2006 Piirola V, Berdyugin A, Coyne S. J. GV, Efimov YS, Shakhovskoy NM. UBVRI polarimetry of the massive interacting binary SX Cassiopeiae: modeling the electron-scattering circumstellar envelope Astronomy & Astrophysics. 454: 277-286. DOI: 10.1051/0004-6361:20064931  0.699
2005 Piirola V, Berdyugin A, Mikkola S, Coyne GVSJ. Polarimetric study of the massive interacting binary W serpentis: Discovery of high-latitude scattering spot/jet Astrophysical Journal. 632: 576-589. DOI: 10.1086/432902  0.692
2005 Villar-Sbaffi A, St-Louis N, Moffat AFJ, Piirola V. First ever polarimetric detection of a wind-wind interaction region and a misaligned flattening of the wind in the Wolf-Rayet binary CQ cephei Astrophysical Journal. 623: 1092-1104. DOI: 10.1086/428830  0.401
2004 Berdyugin A, Piirola V, Teerikorpi P. Interstellar polarization at high galactic latitudes from distant stars Astronomy & Astrophysics. 424: 873-876. DOI: 10.1051/0004-6361:20040308  0.666
2003 Katajainen S, Piirola V, Ramsay G, Scaltriti F, Lehto HJ, Cropper M, Harrop-Allin MK, Anderlucci E, Hakala P. UBVRI photopolarimetry of the long-period eclipsing AM Herculis binary V1309 Ori Monthly Notices of the Royal Astronomical Society. 340: 1-11. DOI: 10.1046/J.1365-8711.2003.06280.X  0.725
2002 Berdyugin A, Piirola V. Polarization variability in the interacting Be binary CX Draconis Astronomy & Astrophysics. 394: 181-186. DOI: 10.1051/0004-6361:20021109  0.618
2001 Tommasi L, Palazzi E, Pian E, Piirola V, Poretti E, Scaltriti F, Sillanpää A, Takalo L, Treves A. Multiband optical polarimetry of BL Lacertae objects with the Nordic Optical Telescope Astronomy & Astrophysics. 376: 51-58. DOI: 10.1051/0004-6361:20010940  0.481
2001 Katajainen S, Scaltriti F, Piirola V, Lehto HJ, Anderlucci E. UBVRI-polarimetry of the AM Herculis star RX J0203.8+2959 Astronomy & Astrophysics. 372: 945-951. DOI: 10.1051/0004-6361:20010549  0.752
1994 Hakala PJ, Piirola V, Vilhu O, Osborne JP, Hannikainen DC. Record circular polarization discovered in the shortest period magnetic cataclysmic variable, RE 1307 + 535 Monthly Notices of the Royal Astronomical Society. 271: L41-L45. DOI: 10.1093/Mnras/271.1.L41  0.683
1993 Hakala PJ, Watson MG, Vilhu O, Hassall BJM, Kellett BJ, Mason KO, Piirola V. The discovery of a new bright eclipsing AM Her system Monthly Notices of the Royal Astronomical Society. 263: 61-68. DOI: 10.1093/Mnras/263.1.61  0.7
1993 Piirola V, Hakala P, Coyne GV. The discovery of variable polarization over the 13.9 minute spin period of the intermediate polar RE 0751 + 14 The Astrophysical Journal. 410: L107. DOI: 10.1086/186891  0.502
1993 Moffat AFJ, Piirola V. Polarization variability among Wolf-Rayet stars. VIII - Emission lines versus continuum in WR + O binaries The Astrophysical Journal. 413: 724. DOI: 10.1086/173040  0.486
1993 St.-Louis N, Moffat AFJ, Lapointe L, Efimov YS, Shakhovskoj NM, Fox GK, Piirola V. Polarization eclipse model of the Wolf-Rayet binary V444 Cygni with constraints on the stellar radii and an estimate of the Wolf-Rayet mass-loss rate The Astrophysical Journal. 410: 342. DOI: 10.1086/172751  0.392
1992 Piirola V, Scaltriti F, Coyne GV. Circumstellar disks deduced from sub-arcsecond polarization observations of two young stars Nature. 359: 399-401. DOI: 10.1038/359399A0  0.423
1990 Piirola V, Reiz A. The highly magnetic (B?500 mg) white dwarf PG 1031+234: Discovery of wavelength dependent polarization and intensity variations Astrophysics and Space Science. 169: 231-232. DOI: 10.1007/BF00640720  0.354
1987 Piirola V, Reiz A, Coyne G. Simultaneous Five Color (Ubvri) Polarimetry of EF Eri International Astronomical Union Colloquium. 93: 197-201. DOI: 10.1007/Bf00654995  0.44
1987 Piirola V, Reiz A, Coyne GV. Simultaneous Five Color (UBVRI) Polarimetry of VV Puppis Astrophysics and Space Science. 130: 203-203. DOI: 10.1007/978-94-009-3801-4_31  0.505
1982 Piirola V. Polarimetry of CH Cygni International Astronomical Union Colloquium. 70: 139-140. DOI: 10.1017/S0252921100097530  0.396
1980 Piirola V. Polarization Observations of U Cephei Symposium - International Astronomical Union. 88: 249-250. DOI: 10.1017/S0074180900064962  0.364
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