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

被引：5

作者：

David-Uraz, A. ^{[1
,2
,3
,4
,5
]}

Shultz, M. E. ^{[1
,2
]}

Petit, V ^{[1
,2
]}

Bowman, D. M. ^{[6
]}

Erba, C. ^{[1
,2
]}

Fine, R. A. ^{[1
,2
]}

Neiner, C. ^{[7
]}

Pablo, H. ^{[8
]}

Sikora, J. ^{[9
]}

ud-Doula, A. ^{[10
]}

Wade, G. A. ^{[11
]}

机构：

[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[2] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA

[3] Howard Univ, Dept Phys & Astron, Washington, DC 20059 USA

[4] NASA GSFC, Ctr Res & Explorat Space Sci & Technol, Greenbelt, MD 20771 USA

[5] NASA GSFC, Xray Astrophys Lab, Greenbelt, MD 20771 USA

[6] Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium

[7] PSL Univ, Sorbonne Univ, Univ Paris, Paris Observ,LESIA,CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France

[8] Amer Assoc Variable Star Observers, 49 Bay State Rd, Cambridge, MA 02138 USA

[9] Bishops Univ, Dept Phys & Astron, Sherbrooke, PQ J1M 1Z7, Canada

[10] Penn State Scranton, 120 Ridge View Dr, Dunmore, PA 18512 USA

[11] Royal Mil Coll Canada, Dept Phys & Space Phys, POB 17000, Kingston, ON K7K 7B4, Canada

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 504卷 / 04期

基金：

欧洲研究理事会; 新加坡国家研究基金会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

techniques: photometric; techniques: polarimetric; techniques: spectroscopic; stars: early-type; stars: magnetic field; stars: rotation; TESS INPUT CATALOG; CHEMICALLY PECULIAR; MASSIVE STARS; ROTATIONAL PROPERTIES; STELLAR EVOLUTION; MIMES SURVEY; HGMN STARS; AP STARS; FIELDS; CLASSIFICATION;

D O I：

10.1093/mnras/stab899

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 +/- 14G. This star is chemically peculiar and classified as an alpha(2) 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.

引用

页码：4841 / 4849

页数：9

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