Search Results - "Pietarila, A."

Comparison of Ground-Based and Space-Based Longitudinal Magnetograms by Pietarila, A., Bertello, L., Harvey, J. W., Pevtsov, A. A.

“…We compare photospheric line-of-sight magnetograms from the Synoptic Optical Long-term Investigations of the Sun (SOLIS) Vector Spectro-Magnetograph (VSM)…”
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Kink Waves in an Active Region Dynamic Fibril by Pietarila, A, Cuadrado, R. Aznar, Hirzberger, J, Solanki, S. K

“…We present high spatial and temporal resolution Ca II 8542 A observations of a kink wave in an on-disk chromospheric active region fibril. The properties of…”
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Ca II 854.2 nm BISECTORS AND CIRCUMFACULAR REGIONS by Pietarila, A, Harvey, J W

“…Active regions appear bright in Ca II 854.2 nm line core intensity while the surrounding areas, referred to as circumfacular regions, are darker than the…”
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SYNOPTIC MAPPING OF CHROMOSPHERIC MAGNETIC FLUX by Jin, C L, Harvey, J W, Pietarila, A

“…We used daily full-disk Ca II 854.2 nm magnetograms from the Synoptic Optical Long Term Investigations of the Sun (SOLIS) facility to study the chromospheric…”
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SIGNATURE OF DIFFERENTIAL ROTATION IN SUN-AS-A-STAR Ca II K MEASUREMENTS by BERTELLO, L, PEVTSOV, A. A, PIETARILA, A

“…The characterization of solar surface differential rotation (SDR) from disk-integrated chromospheric measurements has important implications for the study of…”
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SOLAR CYCLE VARIATION IN SUN-AS-A-STAR Ca II 854.2 nm BISECTORS by Pietarila, A, Livingston, W

“…The bisector of the strong chromospheric Ca II 854.2 nm line has an inverse-C shape, the cause of which is not yet fully understood. We show that the amplitude…”
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Constructing Semi-Empirical Sunspot Models for Helioseismology by Cameron, R. H., Gizon, L., Schunker, H., Pietarila, A.

“…One goal of helioseismology is to determine the subsurface structure of sunspots. In order to do so, it is important to understand first the near-surface…”
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Spectropolarimetric Observations of the Ca II λ8498 and λ8542 in the Quiet Sun by Pietarila, A, Socas-Navarro, H, Bogdan, T

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Transport of Magnetic Flux from the Canopy to the Internetwork by Pietarila, A, Cameron, R. H, Danilovic, S, Solanki, S. K

“…Recent observations have revealed that 8% of linear polarization patches in the internetwork (INW) quiet Sun are fully embedded in downflows. These are not…”
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Spectropolarimetric Observations of the Ca II lambda 8498 and lambda 8542 in the Quiet Sun by Pietarila, A, Socas-Navarro, H, Bogdan, T

“…The Ca II infrared triplet is one of the few magnetically sensitive chromospheric lines available for ground-based observations. We present spectropolarimetric…”
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Spectropolarimetric Inversions of the Ca II 8498 and 8542 Å Lines in the Quiet Sun by Pietarila, A, Socas-Navarro, H, Bogdan, T

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Simulation of Quiet-Sun Waves in the Ca II Infrared Triplet by Pietarila, A, Socas-Navarro, H, Bogdan, T, Carlsson, M, Stein, R. F

“…The Ca II infrared triplet lines around 8540 Ae are good candidates for observing chromospheric magnetism. Model spectra of these lines are obtained by…”
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SOLAR CYCLE VARIATION IN SUN-AS-A-STAR Can 854.2 nm BISECTORS by PIETARILA, A, LIVINGSTON, W

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SIGNATURE OF DIFFERENTIAL ROTATION IN SUN-AS-A-STAR Can II MEASUREMENTS by Bertello, L, PEVTSOV, A A, Pietarila, A

“…The characterization of solar surface differential rotation (SDR) from disk-integrated chromospheric measurements has important implications for the study of…”
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Instrumental and Observational Artifacts in Quiet Sun Magnetic Flux Cancellation Functions by Pietarila, A., Pietarila Graham, J.

“…Under the assumption that the photospheric quiet Sun magnetic field is turbulent, the cancellation function has previously been used to estimate the true,…”
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KINK WAVES IN AN ACTIVE REGION DYNAMIC FIBRIL by Pietarila, A., Cuadrado, R. Aznar, Hirzberger, J., Solanki, S. K.

“…We present high spatial and temporal resolution Ca II 8542 A observations of a kink wave in an on-disk chromospheric active region fibril. The properties of…”
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Constructing Semi-Empirical Sunspot Models forHelioseismology by Cameron, R H, Gizon, L, Schunker, H, Pietarila, A

“…One goal of helioseismology is to determine the subsurface structure of sunspots. In order to do so, it is important to understand first the near-surface…”
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Spectropolarimetric Inversions of the Ca II 8498 and 8542 AA Lines in the Quiet Sun by Pietarila, A, Socas-Navarro, H, Bogdan, T

“…We study non-LTE inversions of the Ca II infrared triplet lines as a tool for inferring physical properties of the quiet Sun. The inversion code is successful…”
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On the Formation of the Resonance Lines of Helium in the Sun by Pietarila, Anna, Judge, Philip G

“…To investigate the cause of anomalously bright resonance lines of helium in the Sun, we have studied the magnitude of the enhancements and some proposals made…”
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Spectropolarimetric Observations of the Ca II l8498 and l8542 in the Quiet Sun by Pietarila, A, Socas-Navarro, H, Bogdan, T

“…The Ca II infrared triplet is one of the few magnetically sensitive chromospheric lines available for ground-based observations. We present spectropolarimetric…”
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