Email: aanorton at stanford.edu
Education
Ph.D. Physics and Astronomy, University of California Los Angeles
M.S. Physics and Astronomy, University of California Los Angeles
B.S. Nuclear Engineering, Cum Laude, Texas A&M
Current & Recent Positions
Senior Research Scientist, Stanford University (current)
Science Editor, The Astrophysical Journal (2017-2020)
Secretary, Solar Physics Division of the American Astronomical Society (2017-2021)
Elected Member, International Astronomical Union, Commission on Solar Activity (E2) (2018-2021)
Past Research and Teaching
Astronomer, James Cook University, Queensland, Australia 2009-2012
Assistant Astronomer, National Solar Observatory, Arizona, 2006-2009
Project Scientist, High Altitude Observatory, NCAR, Colorado, 2004-2005
Advanced Study Program, Postdoctoral Researcher, High Altitude Observatory, NCAR, Colorado, 2001-2003
Postdoctoral Researcher, Stanford University, California, 1999-2001
Nuclear Medicine Technician, Washington State Health Lab, Washington 1992-1993
Undergraduate Research Assistant, Los Alamos National Lab, Summers 1988-1991
Main Research Interests
Sun's Magnetic Fields
Sunspots
Solar Dynamo
Space-based Telescope Design
Select Publications
Norton, A., Howe, R., Upton, L., Usoskin, I., 2023, "Solar Cycle Observations", SSRv, 219, 64 [SSRv]
Raphaldini, B., Dikpati, M., Norton, A. A., Teruya, A. S. W., McIntosh, S. W., Prior, C. B., MacTaggart, D., 2023, "Deciphering the Pre-solar-storm Features of the 2017 September Storm From Global and Local Dynamics", The Astrophysical Journal, 958, 175 [ApJ]
Will, L., Norton, A. A., Hoeksema, J. T., 2023, "The Dependence of Joy's Law as a Function of Flux Emergence Phase", arXiv e-prints, arXiv:2310.20171 [arXiv]
Levens, P. J., Norton, A. A., Linton, M. G., Knizhnik, K. J., Liu, Y., 2023, "Observations of Twist, Current Helicity, and Writhe in the Magnetic Knots of Delta-sunspots Consistent with the Kink Instability of a Highly Twisted Flux Rope", 954, L20 [ApJL]
Norton, A. A., Levens, P. J., Knizhnik, K. J., Linton, M. G., Liu, Y., 2022, "Characterizing the Umbral Magnetic Knots of Delta-Sunspots", 938, 117 [ApJ]
Li, Q., Zhang, L., Yan, X., Norton, A. A., Wang, J., Yang, L., Xue, Z., Kong, D., 2022, "Dependence of the Continuum Intensities on the Magnetic Fields at Different Evolution Phases of Sunspots", 936, 37 [ApJ]
Liu, Y., Grinon-Marin, A. B., Hoeksema, J. T., Norton, A. A., Sun, X., 2022, "On the Hemispheric Bias Seen in Vector Magnetic Field Data", 297, 17 [SoPh]
Grinon-Marin, A. B., Pastor Yabar, A., Liu, Y., Hoeksema, J. T., Norton, A., 2021, "Improvement of the Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Inversion Code", 923, 84 [ApJ]
Dikpati, M., Norton, A. A., McIntosh, S. W., Gilman, P. A., 2021, "Dynamical Splitting of Spot-producing Magnetic Rings in a Nonlinear Shallow-water Model", 922, 46 [ApJ]
Dikpati, M., McIntosh, S. W., Chatterjee, S., Norton, A. A., Ambroz, P., Gilman, P. A., Jain, K., Munoz-Jaramillo, A., 2021, "Deciphering the Deep Origin of Active Regions via Analysis of Magnetograms", 910, 91 [ApJ]
Norton, A.A., Stutz, R.B., Welsch, B.T., 2021, "Oscillations observed in umbra, plage, quiet-Sun and the polarity inversion line of active region 11158 using HMI/SDO data", Royal Society Proceedings Transaction A, 37099175N [arXiv]
Panesar, N.K., Sterling, A.C., Moore, R.L., Tiwari, S.K, De Pontieu, B., Norton, A.A., 2018, "IRIS and SDO Observations of Solar Jetlets Resulting from Network-Edge Flux Cancelation", ApJL, 868L, 27P [arXiv]
Srivastava, A.K., et al, 2018, "The Extended Solar Cycle: Muddying the Waters of Solar/Stellar Dynamo Modeling or Providing Crucial Observational Constraints?", Frontiers in Astronomy and Space Science, 5, 38 [FrASS]
Attie, R., Kirk, M.S., Thompson, B.J., Muglach, K., Norton, A.A., 2018, "Precursors of Magnetic Flux Emergence in the Moat Flows of Active Region AR12673", Space Weather, 16, 8 [Space Weather]
Houston, S.J., Jess, D.B, Asensio Ramos, A., Grant, S.D.T., Beck, C., Norton, A.A., Krishna Prasad, S., 2018, "The Magnetic Response of the Solar Atmosphere to Umbral Flashes", Astrophysical Journal, 860, 28 [ADS]
Xudong, S., Norton, A.A., 2017, "Super-Flaring Active Region 12673 Has One of the Fastest Magnetic Flux Emergence Rates Ever Observed", Research Notes of the AAS, 1, 24 [ADS]
Criscuoli, S., Norton, A.A., Whitney, T., 2017, "Photometric Properties of Network and Faculae Derived from HMI Data Compensated for Scattered-Light", Astrophysical Journal, 847, 93 [ADS]
Norton, A.A., Jones, E.H., Linton, M.G., Leake, J.L., 2017, "Rates of Magnetic Flux Emergence for Preceder and Follower Sunspots in Active Regions Observed with HMI", Astrophysical Journal, 842, 3 [arXiv]
Couvidat, S., Schou, J., Hoeksema, J.T., Bogart, R.S., Bush, R.I., Duvall, T.L., Liu Y., Norton, A.A., Scherrer, P.H., 2016, "Observables Processing for the Helioseismic and Magnetic Imager Instrument on the Solar Dynamics Observatory", Solar Physics, 291, 188 [ADS]
Arden, W.M., Norton, A.A., Sun, X., Zhao, X., 2016, "Comparison of Coronal Extrapolation Methods for Cycle 24 Using HMI Data", Astrophysical Journal, 823, 21 [ADS]
Jaeggli, S.A., Norton, A.A., 2016, "The Magnetic Classification of Solar Active Regions 1992-2015", Astrophysical Journal, 820, L11 [ADS]
McClintock, B.H., Norton, A.A., 2016, "Tilt Angle and Footpoint Separation of Small and Large Bipolar Sunspot Regions Observed with HMI", Astrophysical Journal, 818, 7 [ADS]
Hathaway, D.H., Teil, T., Norton, A.A., Kitiashvili, I., 2015, "The Sun's Photospheric Convection Spectrum", Astrophysical Journal, 811, 105, [ADS]
Fisher, Abbett, Bercik, Cazachenko, Lynch, Welsch, Hoeksema, Hayashi, Liu, Norton, Dalda, Sun, DeRosa, Cheung, 2015 "CGEM: Using HMI Data to Model the Buildup of Free Magnetic Energy in the Solar Corona", Space Weather, 13, 369 [ADS]
Sun, X.D.,, Bobra, M.G., Hoeksema, J.T., Liu, Y., Li, Y., Shen, C., Couvidat, S., Norton, A.A., Fisher, G.H., 2015, "Why is the Great Solar Active Region 12192 Flare-rich but CME-poor?", Astrophysical Journal, 804, L28 [ADS]
Hayashi, K., Hoeksema, J.T., Liu, Y., Bobra, M.G., Sun, X.D., Norton, A.A., 2015, "The HMI Vector Magnetic Field Pipeline: MHD Simulation Module for the Global Solar Corona", Solar Physics, 290, 1507 [ADS]
Norton, A.A., Charbonneau, P., Passos, D., 2014, "Hemispheric Coupling: Comparing Dynamo Simulations and Observations", Space Science Reviews, 186, 251 [ADS]
Broomhall, A.-M., Chatterjee, P., Howe, R., Norton, A.A., Thompson, M.J., 2014, "The Sun's Interior Structure and Dynamics, and the Solar Cycle", Space Science Reviews, 186, 191 [ADS]
Pevtsov, A.A., Berger, M.A., Nindos, A., Norton, A.A., van Driel-Gesztelyi, L, 2014, "Magnetic Helicity, Tilt and Twist", Space Science Reviews, 186, 285 [ADS]
McClintock, B.H., Norton, A.A., Li, J., 2014, "Re-examining Sunspot Tilt Angle to Include Anti-Hale Statistics", Astrophysical Journal, 797, 130 [ADS]
Arden, W.M., Norton, A.A., Sun, X., 2014, "A 'breathing' source surface for cycles 23 and 24", JGR Space Phys, 119, 1476 [ADS]
Hoeksema, J.T, et al., 2014, "Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Pipeline", Solar Physics, 289,3483 [ADS]
Centeno, R., Schou, J., Hayashi, K., Norton, A., Hoeksema, J.T., Liu, Y., Leka, K.D., Barnes, G., 2014, "The HMI vector magnetic field pipeline: optimization of the spectral line inversion code", Solar Physics, 289, 3531 [arXiv]
Norton, A.A., et al., 2013, "How much more can sunspots tell us about the solar dynamo?", IAU Symposium, 294, 25 [ADS]
Norton, A.A., Jones, E.H., Liu, Y., 2013, "How do the magnetic field strengths of sunspots vary over the solar cycle?", Journal of Physics Conf Ser., 440, 1, id:012038 [ADS]
McClintock, B.H., Norton, A.A., 2013, "Recovering Joy's Law as a Function of Solar Cycle, Hemisphere, and Longitude", Solar Physics, 287, 15 [ADS]
Vieira, L., Norton A., Dudok de Wit, T., Kretzschmar, M., Schimdt, G., Cheung, M.C.M., 2012, "How the inclination of Earth's orbit affects incoming solar irradiance", Geophys Research Letters, 39 [ADS]
Norton, A.A., Gallagher, J.C., 2010, "Solar Cycle Characteristics Examined in Separate Hemispheres", Solar Physics, 261, 193 [ADS]
Norton, A.A., Raouafi, N.E., Petrie, G.J.D., 2008, "The Tilted Solar Dipole as Observed and Modeled during the 1996 Solar Minimum", Astophysical Journal, 682, 1306 [ADS]
Raouafi, N.E., Petrie, G.J.D., Norton, A.A., Henney, C.J., Solanki, S.K., 2008, "Evidence for Polar Jets as Precursors of Polar Plume Formation", Astophysical Journal, 682L, 137 [ADS]
Borrero, J.M., Tomczyk, S., Norton, A., Darnell, T., Schou, J., Scherrer, P., Bush, R., Liu, Y., 2007, "Magnetic Field Vector Retrieval With the Helioseismic and Magnetic Imager", Solar physics, 240, 177 [ADS]
Socas-Navarro, H., Norton, A.A., 2007, "The Solar Oxygen Crisis: Probably Not the Last Word", Astrophysical Journal, 660, L153 [ADS]
Norton, A.A., et al. 2006, "Spectral Line Selection for HMI", Solar Physics, 239, 69 [ADS]
Norton, A.A., Gilman, P.A.. 2005, "Recovering Solar Toroidal Field Dynamics from Sunspot Location Patterns", Astrophysical Journal, 630, 1194 [ADS]
Norton, A.A., Gilman, P.A.. 2004, "Magnetic Field-Minimum Intensity Correlation in Sunspots: A Tool for Solar Dynamo Diagnostics", Astrophysical Journal, 603, 348 [ADS]
Norton, A.A., Settele, A, 2003, "Acceleration Effects in MDI Magnetogram Data", Solar Physics, 214, 227 [ADS]
Norton, A.A., Uitenbroek, H., 2002, "Observing MHD oscillations: the effects of vertical magnetic gradients and thermodynamic fluctuations", SOLMAG, IAU Collaoquium 188, 281 [ADS]
Norton, A.A., Ulrich, R.K., Liu, Y., 2001, "Center to Limb Angle Dependence of Phases (v, δ|B|)", Astrophysical Journal, 561, 435 [ADS]
Norton, A.A., Ulrich, R.K., 2000, "Magnetic Oscillations in the Solar Photosphere: Observations with MDI, ASP and MWO", Solar Physics, 192, 403 [ADS]
Norton, A.A., Ulrich, R.K., Bush, R.I., Tarbell, T.D., 1999, "Characteristics of MHD Oscillations Observed with MDI", Astrophysical Journal, 518, L123 [ADS]
Poetry (my hobby)
Poem featured on 24PearlStreet Blog Tolstoy, I am trying to forgive you
Poem featured on 24PearlStreet Blog Dutiful Daughters, Sleeping Sons
Guest poet in "Laboratorio" edited by Simon Barraclough and published by Sidekick Books: Laboratorio and Sample Poems
Chapbook published by Drunken Boat, Permissions, 2013, link not active
Poem in Leviathan: A Journal of Melville Studies Building My Boat from Kindling
Code Poetry published by Really Systems: Apache Code Errors
More poetry at Really Systems: No Sin Like Arson
Geospatial Poetry at Cascadia Chronicle, Earthquake Preparedness, link not active
4 Poems in Softblow: 4 Poems in Softblow
Many Mountains Moving Finalist: In the Name of Cleanliness