J/MNRAS/504/5813 Does magnetized OB stars produce magnetars ? (Makarenko+, 2021)
Testing the fossil field hypothesis could strongly magnetized OB stars produce
all known magnetars ?
Makarenko E.I, Igoshev A.P, Kholtygin A.F
<Mon. Not. R. Astron. Soc. 504, 5813-5828 (2021)>
=2021MNRAS.504.5813M 2021MNRAS.504.5813M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, OB ; Magnetic fields ; Stars, A-type ; Stars, neutron ;
X-ray sources ; Photometry
Keywords: magnetic fields - methods: statistical - stars: magnetars -
stars: magnetic field - stars: massive - stars: neutron
Abstract:
Stars of spectral types O and B produce neutron stars (NSs) after
supernova explosions. Most of NSs are strongly magnetized including
normal radio pulsars with B ∝ 1012 G and magnetars with B
∝ 1014 G. A fraction of 7-12 per cent of massive stars are
also magnetized with B ∝ 103 G and some are weakly magnetized
with B ∝ 1 G. It was suggested that magnetic fields of NSs
could be the fossil remnants of magnetic fields of their progenitors.
This work is dedicated to study this hypothesis. First, we gather all
modern precise measurements of surface magnetic fields in O, B, and A
stars. Secondly, we estimate parameters for lognormal distribution of
magnetic fields in B stars and found µB = 2.83 ± 0.1 log10 (G),
σB = 0.65 ± 0.09 for strongly magnetized and
µB = 0.14 ± 0.5 log10 (G), σ = 0.7-0.27+0.57 for weakly
magnetized. Third, we assume that the magnetic field of pulsars and
magnetars have 2.7-dex difference in magnetic fields and magnetars
represent 10 per cent of all young NSs and run population synthesis.
We found that it is impossible to simultaneously reproduce pulsars
and magnetars populations if the difference in their magnetic fields
is 2.7 dex. Therefore, we conclude that the simple fossil origin of
the magnetic field is not viable for NSs.
Description:
We constitute our samples data by magnetic fields, orbital periods and
rotation velocity measurements from severals literature references. We
compiled our results by selecting high quality candidates analysed
with probability tests and criteria selections. For details on
probability tests and criteria selections please see section 2 :
Magnetic massive stars. Hereafter, the tables tablec1-c4.dat represent
respectively lists of B, A, O and weakly-magnetic stars. They will be
compared with real pulsars and magnetars. To do so, we use the ATNF
catalogue (Manchester et al. 2005AJ....129.1993M 2005AJ....129.1993M, Cat. B/psr), McGill
Online magnetar catalogue (Olausen & Kaspi 2014ApJS..212....6O 2014ApJS..212....6O, Cat.
J/ApJS/212/6), and Magnetar Outburst Online Catalogue (Coti Zelati et
al. 2018MNRAS.474..961C 2018MNRAS.474..961C).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 167 92 List of B stars
tablec2.dat 144 93 List of A stars
tablec3.dat 139 11 List of O stars
tablec4.dat 176 9 List of weakly-magnetic (WM) stars
refs.dat 269 52 References
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See also:
B/psr : ATNF Pulsar Catalogue (Manchester+, 2005)
J/ApJS/212/6 : The McGill magnetar catalog (Olausen+, 2014)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name B star name (Name)
21- 26 F6.1 10-4T Brms Root mean square of magnetic fields (Brms)
28- 33 F6.1 10-4T e_Brms Standard deviation of Brms (sigmaB)
35- 37 A3 --- f_Porb [yes no] Flag on the orbital period
measurement (f_Porb)
39- 49 F11.4 d Porb ? Orbital period (Porbital)
51- 52 I2 h RAh ? Right ascension (J2000)
54- 55 I2 min RAm ? Right ascension (J2000)
57- 58 I2 s RAs ? Right ascension (J2000)
60 A1 --- DE- Declination sign (J2000)
61- 62 I2 deg DEd ? Declination (J2000)
64- 65 I2 arcmin DEm ? Declination (J2000)
67- 68 I2 arcsec DEs ? Declination (J2000)
70- 86 F17.13 deg RAdeg Right ascension (J2000)
88-104 F17.13 deg DEdeg Declination (J2000)
106-110 F5.1 km/s vsini ? Rotation velocity (vsini)
112-115 F4.1 km/s e_vsini ? Standard deviation of vsini (sigmav)
117-167 A51 --- Refs Literature references, in refs.dat file (Ref)
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Byte-by-byte Description of file: tablec2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name A star name (Name)
11- 17 F7.1 10-4T Brms Root mean square of magnetic fields (Brms)
19- 24 F6.1 10-4T e_Brms Standard deviation of Brms (sigmaB)
26- 28 A3 --- f_Porb [yes no] Flag on the orbital period
measurement (f_Porb)
30 A1 --- l_Porb Limit flag on Porb (l_Porb)
32- 42 F11.5 d Porb ? Orbital period (Porbital)
44- 45 I2 h RAh ? Right ascension (J2000)
47- 48 I2 min RAm ? Right ascension (J2000)
50- 51 I2 s RAs ? Right ascension (J2000)
53 A1 --- DE- Declination sign (J2000)
54- 55 I2 deg DEd ? Declination (J2000)
57- 58 I2 arcmin DEm ? Declination (J2000)
60- 61 I2 arcsec DEs ? Declination (J2000)
63- 79 F17.13 deg RAdeg Right ascension (J2000)
81- 97 F17.13 deg DEdeg Declination (J2000)
99-144 A46 --- Refs Literature references, in refs.dat file (Ref)
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Byte-by-byte Description of file: tablec3.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name O star name (Name)
14- 19 F6.1 10-4T Brms Root mean square of magnetic fields (Brms)
21- 24 I4 10-4T e_Brms Standard deviation of Brms (sigmaB)
26- 28 A3 --- f_Porb [yes no] Flag on the orbital period
measurement (f_Porb)
30- 40 F11.6 d Porb ? Orbital period (Porbital)
42- 43 I2 h RAh ? Right ascension (J2000)
45- 46 I2 min RAm ? Right ascension (J2000)
48- 49 I2 s RAs ? Right ascension (J2000)
51 A1 --- DE- Declination sign (J2000)
52- 53 I2 deg DEd ? Declination (J2000)
55- 56 I2 arcmin DEm ? Declination (J2000)
58- 59 I2 arcsec DEs ? Declination (J2000)
61- 77 F17.13 deg RAdeg Right ascension (J2000)
79- 95 F17.13 deg DEdeg Declination (J2000)
97-114 F18.15 mag mag Mean apparent magnitude (mag)
116-139 A24 --- Refs Literature references, in refs.dat file (Ref)
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Byte-by-byte Description of file: tablec4.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Weakly-magnetic star name (Name)
10- 22 A13 --- Evol Evolution type
24- 28 F5.2 10-4T Brms Root mean square of magnetic fields (Brms)
30- 33 F4.2 10-4T e_Brms Standard deviation of Brms (sigmaB)
35- 42 A8 --- f_Porb [yes no planets!] Flag on the orbital period
measurement (f_Porb)
44- 53 F10.5 d Porb ? Orbital period (Porbital)
55- 56 I2 h RAh ? Right ascension (J2000)
58- 59 I2 min RAm ? Right ascension (J2000)
61- 62 I2 s RAs ? Right ascension (J2000)
64 A1 --- DE- Declination sign (J2000)
65- 66 I2 deg DEd ? Declination (J2000)
68- 69 I2 arcmin DEm ? Declination (J2000)
71- 72 I2 arcsec DEs ? Declination (J2000)
74- 90 F17.13 deg RAdeg Right ascension (J2000)
92-108 F17.13 deg DEdeg Declination (J2000)
110-113 F4.1 km/s vsini ? Rotation velocity (vsini)
115-117 F3.1 km/s E_vsini ? Upper limit of vsini (E_vsini)
119-121 F3.1 km/s e_vsini ? Lower limit of vsini (e_vsini)
123-176 A54 --- Refs Literature references, in refs.dat file (Ref)
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 31 A31 --- Refs Reference
33- 51 A19 --- Bibcode BibCode
53-269 A217 --- Com Comments
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History:
From electronic version of the journal
(End) Luc Trabelsi [CDS] 16-May-2024