Magnetic Field of the Ap Star 33 Lib: A Study in Different Spectral Lines

Butkovskaya, V. V.; Plachinda, S. I.

doi:10.3103/s0884591319020028

Cited by 3 publications

(8 citation statements)

References 22 publications

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“…It should be noted that we did not detect polarization artifacts from observations in 2006 (EEV1 detector) of the slowly rotating magnetic star 33 Lib (Butkovskaya & Plachinda 2019). We also found no such polarization artifacts in observations of the classical magnetic star CrB with other telescopes: over 32 nights in 1993-2004 with the coude long-slit spectrograph at the 2.6 m Shajn reflector of the Crimean Astrophysical Observatory, and over six nights in 2007-2009 with the high-resolution 2017).…”

Section: Data Reduction and Treatmentmentioning

confidence: 63%

“…The calculation of the magnetic field longitudinal component (see Formula (1) above) for Tau and Oph has been performed by measuring the Zeeman splitting in individual spectral lines, using the procedure discussed in detail by Butkovskaya & Plachinda (2007); Plachinda (2004); Plachinda & Tarasova (1999). The SL-method (Single Line) developed at CrAO makes it possible to measure the magnetic field by the centers of gravity of the polarized components of individual spectral lines.…”

Section: Data Reduction and Treatmentmentioning

confidence: 99%

“…If we want to achieve maximum signal-to-noise ratio, the LSD method is preferable (for example, to detect weak magnetic fields), but if our goal is to investigate inhomogeneous physical conditions on the surface of the star, the Single Line (SL) method (Butkovskaya & Plachinda 2007;Plachinda 2004;Plachinda & Tarasova 1999) is more suitable. Different spectral lines in the stellar atmosphere can be formed under different physical conditions, both on the surface and with depth.…”

Section: Introductionmentioning

confidence: 99%

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Toward the global magnetic field of the planet‐hosting red giant eps Tau

2021

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We present the results of a search for the magnetic field inhomogeneity for the red giant Tau. This research is based on observations obtained over 10 nights in 2008-2010 with the ESPaDOnS CFHT spectropolarimeter. We found a previously undescribed instrumental effect in the ESPaDOnS spectra, consisting of random polarization outliers. Therefore, to measure the magnetic field from the unblended individual lines, we preliminarily cleared the initial array of spectral lines from the lines distorted by polarization outliers. On only one date from 10, the magnetic field of Tau was found to exceed 3 . We also revealed that during two nights the time series of the magnetic field values shows a distribution that is different from the normal distribution. A hypothesis was put forward that this may be due to the inhomogeneity of the magnetic field of this star.

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Section: Data Reduction and Treatmentmentioning

confidence: 63%

Section: Data Reduction and Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toward the global magnetic field of the planet‐hosting red giant eps Tau

2021

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“…33 Lib (F0VspEuGdSr). Неоднородность структуры магнитного поля roAp звезды 33 Lib исследована в работе Butkovskaya and Plachinda (2019). В частности, авторы обнаружили, что разные спектральные линии, в том числе разные линии одного и того же химического элемента (см.…”

Section: измерение магнитного поля у магнитных звезд по отдельным линиямunclassified

Исследования Космического Магнетизма В Крымской Астрофизической Обсерватории. II. Прямые Спектрополяриметрические Измерения Магнитных Полей Звезд

Plachinda¹,

Бутковская²

2020

Изв. Крымск. Астрофиз. Обсерв.

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С 80-х годов 20-го века по настоящее время в Крымской астрофизической обсерватории выполняются регулярные спектрополяриметрические наблюдения невырожденных звезд разных спектральных классов и типов светимостей. В обзоре изложено становление инструментальной базы и развитие методики измерения звездных магнитных полей, а также приведен ряд результатов исследования магнитных полей разных объектов, впервые полученных в Крымской астрофизической обсерватории в разные годы.

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Section: Introductionmentioning

confidence: 99%

Towards the global magnetic field of the planet-hosting red giant eps Tau

Plachinda,

Butkovskaya,

Pankov

2021

Preprint

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We present the results of a search for the magnetic field inhomogeneity for the red giant Tau. This research is based on observations obtained over 10 nights in 2008-2010 with the ESPaDOnS CFHT spectropolarimeter. We found a previously undescribed instrumental effect in the ESPaDOnS spectra, consisting in random polarization outliers. Therefore, to measure the magnetic field from the unblended individual lines, we preliminarily cleared the initial array of spectral lines from the lines distorted by polarization outliers. On only one date from ten, the magnetic field of Tau was found to exceed 3 . We also revealed that during two nights the time series of the magnetic field values shows a distribution that is different from the normal distribution. A hypothesis was put forward that this may be due to the inhomogeneity of the magnetic field of this star.

show abstract

Magnetic Field of the Ap Star 33 Lib: A Study in Different Spectral Lines

Cited by 3 publications

References 22 publications

Toward the global magnetic field of the planet‐hosting red giant eps Tau

Toward the global magnetic field of the planet‐hosting red giant eps Tau

Исследования Космического Магнетизма В Крымской Астрофизической Обсерватории. II. Прямые Спектрополяриметрические Измерения Магнитных Полей Звезд

Towards the global magnetic field of the planet-hosting red giant eps Tau

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