MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates

A. David-Uraz; M. E. Shultz; V. Petit; D. M. Bowman; C. Erba; R. A. Fine; C. Neiner; H. Pablo; J. Sikora; A. Ud-Doula; G. A. Wade

doi:10.1093/mnras/stab899

MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates

A. David-Uraz, M. E. Shultz, V. Petit, D. M. Bowman, C. Erba, R. A. Fine, C. Neiner, H. Pablo, J. Sikora, A. Ud-Doula, G. A. Wade

Penn State Scranton

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

In this paper, we present results from the spectropolarimetric follow-up of photometrically selected candidate magnetic B stars from the MOBSTER (Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties) project. Out of four observed targets, one (HD 38170) is found to host a detectable surface magnetic field, with a maximum longitudinal field measurement of 105 ± 14 G. This star is chemically peculiar and classified as an α2 CVn variable. Its detection validates the use of the Transiting Exoplanet Survey Satellite (TESS) to perform a photometric selection of magnetic candidates. Furthermore, upper limits on the strength of a putative dipolar magnetic field are derived for the remaining three stars, and we report the discovery of a previously unknown spectroscopic binary system, HD 25709. Finally, we use our non-detections as case studies to further inform the criteria to be used for the selection of a larger sample of stars to be followed up using high-resolution spectropolarimetry.

Original language	English (US)
Pages (from-to)	4841-4849
Number of pages	9
Journal	Monthly Notices of the Royal Astronomical Society
Volume	504
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stab899
State	Published - Jul 1 2021

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stab899

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David-Uraz, A., Shultz, M. E., Petit, V., Bowman, D. M., Erba, C., Fine, R. A., Neiner, C., Pablo, H., Sikora, J., Ud-Doula, A., & Wade, G. A. (2021). MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates. Monthly Notices of the Royal Astronomical Society, 504(4), 4841-4849. https://doi.org/10.1093/mnras/stab899

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title = "MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates",

abstract = "In this paper, we present results from the spectropolarimetric follow-up of photometrically selected candidate magnetic B stars from the MOBSTER (Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties) project. Out of four observed targets, one (HD 38170) is found to host a detectable surface magnetic field, with a maximum longitudinal field measurement of 105 ± 14 G. This star is chemically peculiar and classified as an α2 CVn variable. Its detection validates the use of the Transiting Exoplanet Survey Satellite (TESS) to perform a photometric selection of magnetic candidates. Furthermore, upper limits on the strength of a putative dipolar magnetic field are derived for the remaining three stars, and we report the discovery of a previously unknown spectroscopic binary system, HD 25709. Finally, we use our non-detections as case studies to further inform the criteria to be used for the selection of a larger sample of stars to be followed up using high-resolution spectropolarimetry.",

author = "A. David-Uraz and Shultz, {M. E.} and V. Petit and Bowman, {D. M.} and C. Erba and Fine, {R. A.} and C. Neiner and H. Pablo and J. Sikora and A. Ud-Doula and Wade, {G. A.}",

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David-Uraz, A, Shultz, ME, Petit, V, Bowman, DM, Erba, C, Fine, RA, Neiner, C, Pablo, H, Sikora, J, Ud-Doula, A & Wade, GA 2021, 'MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates', Monthly Notices of the Royal Astronomical Society, vol. 504, no. 4, pp. 4841-4849. https://doi.org/10.1093/mnras/stab899

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T1 - MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates

AU - David-Uraz, A.

AU - Shultz, M. E.

AU - Petit, V.

AU - Bowman, D. M.

AU - Erba, C.

AU - Fine, R. A.

AU - Neiner, C.

AU - Pablo, H.

AU - Sikora, J.

AU - Ud-Doula, A.

AU - Wade, G. A.

PY - 2021/7/1

Y1 - 2021/7/1

N2 - In this paper, we present results from the spectropolarimetric follow-up of photometrically selected candidate magnetic B stars from the MOBSTER (Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties) project. Out of four observed targets, one (HD 38170) is found to host a detectable surface magnetic field, with a maximum longitudinal field measurement of 105 ± 14 G. This star is chemically peculiar and classified as an α2 CVn variable. Its detection validates the use of the Transiting Exoplanet Survey Satellite (TESS) to perform a photometric selection of magnetic candidates. Furthermore, upper limits on the strength of a putative dipolar magnetic field are derived for the remaining three stars, and we report the discovery of a previously unknown spectroscopic binary system, HD 25709. Finally, we use our non-detections as case studies to further inform the criteria to be used for the selection of a larger sample of stars to be followed up using high-resolution spectropolarimetry.

AB - In this paper, we present results from the spectropolarimetric follow-up of photometrically selected candidate magnetic B stars from the MOBSTER (Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties) project. Out of four observed targets, one (HD 38170) is found to host a detectable surface magnetic field, with a maximum longitudinal field measurement of 105 ± 14 G. This star is chemically peculiar and classified as an α2 CVn variable. Its detection validates the use of the Transiting Exoplanet Survey Satellite (TESS) to perform a photometric selection of magnetic candidates. Furthermore, upper limits on the strength of a putative dipolar magnetic field are derived for the remaining three stars, and we report the discovery of a previously unknown spectroscopic binary system, HD 25709. Finally, we use our non-detections as case studies to further inform the criteria to be used for the selection of a larger sample of stars to be followed up using high-resolution spectropolarimetry.

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MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates

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