Results 71 to 80 of about 3,094 (200)
The Astrophysical JournalFull-disk measurements of the solar magnetic field by the Helioseismic and Magnetic Imager (HMI) are often used for magnetic field extrapolations, but its limited spatial and spectral resolution can lead to significant errors.
C. Beck +5 more
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Optical Spectropolarimetry With Incomplete Data Sets [PDF]
, 2008 Context. Linear spectropolarimetry is a >photon-hungry> observing technique, requiring a specific sequence of observations to determine the Stokes Q and U parameters.
Maund, J. R., J. R. Maund
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Spectropolarimetry and the Study of Circumstellar Disks [PDF]
, 2007 Circumstellar disks play an important role in many stages of the evolution of stars. However, it is only possible to directly image circumstellar disks for a few of the nearest stars. For massive stars, the situation is even more difficult, as they are on average further away than the more numerous low mass stars.
openaire +2 more sources
Solar spectropolarimetry: a personal view
, 2022 Talk delivered in Seminar Series of the Osservatorio Astrofisico di Catania (Virtual), 2020.Spectropolarimetry is the most comprehensive way of measuring the properties of electromagnetic radiation.
Toro, José Carlos del
core
The Astrophysical Journal LettersWe present high-resolution observations of a C4.1-class solar flare (SOL2023-05-03T20:53) in AR 13293 from the Visible Spectro-Polarimeter (ViSP) and Visible Broadband Imager (VBI) instruments at the DKIST.
Rahul Yadav +4 more
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Spectropolarimetry of Fraunhofer Lines in Local Upper Solar Atmosphere
The Astrophysical JournalSpectropolarimetric results of Fraunhofer lines between 516.3 and 532.6 nm are presented in local upper solar chromosphere and inner corona below a height of about 0.04 solar radius above the solar limb. The data were acquired on 2013 November 3 during a
Z. Q. Qu +8 more
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The CHARA Array Polarization Model and Prospects for Spectropolarimetry
The Astronomical JournalPolarimetric data provide key insights into infrared emission mechanisms in the inner disks of young stellar objects (YSOs) and the details of dust formation around asymptotic giant branch (AGB) stars. While polarization measurements are well-established
Linling Shuai +7 more
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Infrared spectropolarimetry of a C-class solar flare footpoint plasma
Astronomy & AstrophysicsWe performed high-spatial-resolution spectropolarimetric observations of the active region NOAA 13363 during a C-class flare with the Gregor Infrared Spectrograph (GRIS) on 16 July 2023.
Vashalomidze Z. +12 more
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Spectropolarimetry of Supernovae
I will present results from spectropolarimetry of various recent supernovae obtained by the UC Berkeley group primarily at Lick Observatory. These include the Type Ia SN 2019ein, as well as the Type II SNe 2021jya, 2023ixf, and 2024iss. Various interesting results have been obtained and will be described.
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PolStar - An Explorer-Class FUV Spectropolarimetry Mission to Map the Environments of Massive Stars
, 2019 PolStar is an Explorer-class far ultraviolet (FUV) spectropolarimetry mission designed to target massive stars and their environments. PolStar will take advantage of resonance lines only available in the FUV to measure for the first time the magnetic and
Bjorkman, Jon +28 more
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