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：

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

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

共 75 条

[1] The BinaMIcS project: understanding the origin of magnetic fields in massive stars through close binary systems
Alecian, E.
Neiner, C.
Wade, G. A.
Mathis, S.
Bohlender, D.
Cebron, D.
Folsom, C.
Grunhut, J.
Le Bouquin, J-B
Petit, V
Sana, H.
Tkachenko, A.
ud-Doula, A.
[J]. NEW WINDOWS ON MASSIVE STARS: ASTEROSEISMOLOGY, INTERFEROMETRY AND SPECTROPOLARIMETRY, 2014, 307 : 330 - 335
[2] [Anonymous], 2000, BALT ASTRON
[3] [Anonymous], 2004, Polarization in Spectral Lines
[4] MAGNETIC FIELDS OF THE A-TYPE STARS
BABCOCK, HW
[J]. ASTROPHYSICAL JOURNAL, 1958, 128 (02) : 228 - &
[5] A search for strong magnetic fields in massive and very massive stars in the Magellanic Clouds
Bagnulo, S.
Wade, G. A.
Naze, Y.
Grunhut, J. H.
Shultz, M. E.
Asher, D. J.
Crowther, P. A.
Evans, C. J.
David-Uraz, A.
Howarth, I. D.
Morrell, N.
Munoz, M. S.
Neiner, C.
Puls, J.
Szymanski, M. K.
Vink, J. S.
[J]. ASTRONOMY & ASTROPHYSICS, 2020, 635
[6] Activity in A-type stars
Balona, L. A.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 431 (03) : 2240 - 2252
[7] Barron J., 2020, P POLISH ASTRON SOC, V11, P226
[8] K2 space photometry reveals rotational modulation and stellar pulsations in chemically peculiar A and B stars
Bowman, D. M.
Buysschaert, B.
Neiner, C.
Papics, P. I.
Oksala, M. E.
Aerts, C.
[J]. ASTRONOMY & ASTROPHYSICS, 2018, 616
[9] Gaia Data Release 2. Summary of the contents and survey properties
Brown, A. G. A.
Vallenari, A.
Prusti, T.
de Bruijne, J. H. J.
Babusiaux, C.
Bailer-Jones, C. A. L.
Biermann, M.
Evans, D. W.
Eyer, L.
Jansen, F.
Jordi, C.
Klioner, S. A.
Lammers, U.
Lindegren, L.
Luri, X.
Mignard, F.
Panem, C.
Pourbaix, D.
Randich, S.
Sartoretti, P.
Siddiqui, H. I.
Soubiran, C.
van Leeuwen, F.
Walton, N. A.
Arenou, F.
Bastian, U.
Cropper, M.
Drimmel, R.
Katz, D.
Lattanzi, M. G.
Bakker, J.
Cacciari, C.
Castaneda, J.
Chaoul, L.
Cheek, N.
De Angeli, F.
Fabricius, C.
Guerra, R.
Holl, B.
Masana, E.
Messineo, R.
Mowlavi, N.
Nienartowicz, K.
Panuzzo, P.
Portell, J.
Riello, M.
Seabroke, G. M.
Tanga, P.
Thevenin, F.
Gracia-Abril, G.
[J]. ASTRONOMY & ASTROPHYSICS, 2018, 616
[10] Detection of magnetic fields in chemically peculiar stars observed with the K2 space mission
Buysschaert, B.
Neiner, C.
Martin, A. J.
Aerts, C.
Bowman, D. M.
Oksala, M. E.
Van Reeth, T.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 478 (02) : 2777 - 2793

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