Magnetic Fields of CP Stars in the Orion OB1 Association. IV. Stars of Subgroup 1b

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Magnetic Fields of CP Stars in the Orion OB1 Association. IV. Stars of Subgroup 1b. / Romanyuk, I. I.; Semenko, E. A.; Moiseeva, A. V.; Yakunin, I. A.; Kudryavtsev, D. O.

In: Astrophysical Bulletin, Vol. 76, No. 1, 01.2021, p. 39-54.

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

Author

Romanyuk, I. I. ; Semenko, E. A. ; Moiseeva, A. V. ; Yakunin, I. A. ; Kudryavtsev, D. O. / Magnetic Fields of CP Stars in the Orion OB1 Association. IV. Stars of Subgroup 1b. In: Astrophysical Bulletin. 2021 ; Vol. 76, No. 1. pp. 39-54.

BibTeX

@article{9a5be33ed8654585b99c1127b00873d1,

title = "Magnetic Fields of CP Stars in the Orion OB1 Association. IV. Stars of Subgroup 1b",

abstract = "The paper presents magnetic field measurements for 15 chemically peculiar (CP) stars of subgroup 1b in the Orion OB1 association. We have found that the proportion of stars with strong magnetic fields among these 15 CP stars is almost twice as large as in subgroup 1a. Along with this, the age of subgroup 1b is estimated as 2 Myr, and the age of subgroup 1a is in the order of 10 Myr. The average root-mean-square magnetic field (Formula presented.) (all) for stars in subgroup 1b is 2.3 times higher than that for stars in subgroup 1a. The conclusions obtained fall within the concept of the fossil origin of large-scale magnetic fields in B and A stars, but the rate of field weakening with age appears anomalously high. We present our results as an important observational test for calibrating the theory of stellar magnetic field formation and evolution.",

keywords = "stars: chemically peculiar, stars: magnetic field",

author = "Romanyuk, {I. I.} and Semenko, {E. A.} and Moiseeva, {A. V.} and Yakunin, {I. A.} and Kudryavtsev, {D. O.}",

year = "2021",

month = jan,

doi = "10.1134/S1990341321010090",

language = "English",

volume = "76",

pages = "39--54",

journal = "Astrophysical Bulletin",

issn = "1990-3413",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "1",

}

RIS

TY - JOUR

T1 - Magnetic Fields of CP Stars in the Orion OB1 Association. IV. Stars of Subgroup 1b

AU - Romanyuk, I. I.

AU - Semenko, E. A.

AU - Moiseeva, A. V.

AU - Yakunin, I. A.

AU - Kudryavtsev, D. O.

PY - 2021/1

Y1 - 2021/1

N2 - The paper presents magnetic field measurements for 15 chemically peculiar (CP) stars of subgroup 1b in the Orion OB1 association. We have found that the proportion of stars with strong magnetic fields among these 15 CP stars is almost twice as large as in subgroup 1a. Along with this, the age of subgroup 1b is estimated as 2 Myr, and the age of subgroup 1a is in the order of 10 Myr. The average root-mean-square magnetic field (Formula presented.) (all) for stars in subgroup 1b is 2.3 times higher than that for stars in subgroup 1a. The conclusions obtained fall within the concept of the fossil origin of large-scale magnetic fields in B and A stars, but the rate of field weakening with age appears anomalously high. We present our results as an important observational test for calibrating the theory of stellar magnetic field formation and evolution.

AB - The paper presents magnetic field measurements for 15 chemically peculiar (CP) stars of subgroup 1b in the Orion OB1 association. We have found that the proportion of stars with strong magnetic fields among these 15 CP stars is almost twice as large as in subgroup 1a. Along with this, the age of subgroup 1b is estimated as 2 Myr, and the age of subgroup 1a is in the order of 10 Myr. The average root-mean-square magnetic field (Formula presented.) (all) for stars in subgroup 1b is 2.3 times higher than that for stars in subgroup 1a. The conclusions obtained fall within the concept of the fossil origin of large-scale magnetic fields in B and A stars, but the rate of field weakening with age appears anomalously high. We present our results as an important observational test for calibrating the theory of stellar magnetic field formation and evolution.

KW - stars: chemically peculiar

KW - stars: magnetic field

UR - http://www.scopus.com/inward/record.url?scp=85104048283&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/cae91f24-226c-334a-991c-4a6ddea9f8bd/

U2 - 10.1134/S1990341321010090

DO - 10.1134/S1990341321010090

M3 - Article

AN - SCOPUS:85104048283

VL - 76

SP - 39

EP - 54

JO - Astrophysical Bulletin

JF - Astrophysical Bulletin

SN - 1990-3413

IS - 1

ER -

ID: 78119851