J/ApJ/936/112 OBe stellar masses (Dallas+, 2022)
Classical OBe Stars as Post-supernova Runaways: Confirming Binary Origins.
Dallas M.M., Oey M.S., Castro N.
<Astrophys. J., 936, 112 (2022)>
=2022ApJ...936..112D 2022ApJ...936..112D
ADC_Keywords: Stars, double and multiple; Stars, OB; Stars, masses
Keywords: Be stars ; Oe stars ; Core-collapse supernovae ; Stellar
evolutionary models ; High mass x-ray binary stars ;
Circumstellar disks ; Interacting binary stars ; Multiple star
evolution ; Compact objects ; Star clusters ; Small Magellanic
Cloud ; Runaway stars
Abstract:
Massive binaries play an important role in fields ranging from
gravitational- wave astronomy to stellar evolution. We provide several
lines of evidence that classical OBe stars in the Small Magellanic
Cloud (SMC) obtain their rapid rotation from mass and angular momentum
transfer in massive binaries, which predicts that the subsequent
supernovae should often eject OBe stars into the field. We find that
(1) OBe stars have a higher field frequency than OB stars; (2) our
cumulative distribution function (CDF) of stellar distances from O
stars shows that OBe stars are indeed much more isolated than ordinary
OB stars of corresponding spectral types; (3) the CDFs of OBe stars
approach that of high-mass X-ray binaries (HMXBs), which are confirmed
post-supernova objects; and (4) Oe stars are as isolated from clusters
as Be stars, implying that their final masses are relatively
independent of their initial masses, consistent with major mass
transfer. Lastly, we also find that the spatial distribution of
supergiant OBe stars differs from that of classical OBe stars,
consistent with the different mechanisms responsible for their
emission-line spectra.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 1360 Oey et al., 2004, J/AJ/127/1632 (OKP) Sample
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See also:
III/23 : MK Classification for OB Stars (Lesh 1968)
II/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)
J/A+AS/102/451 : Emission-line stars and PNe in the SMC (Meyssonnier+ 1993)
J/A+A/393/887 : SMC Be stars candidates (Mennickent+, 2002)
J/MNRAS/353/601 : 2dF survey of the Small Magellanic Cloud (Evans+, 2004)
J/AJ/127/1632 : UBVR(UIT) photometry of O and OB stars in SMC (Oey+, 2004)
J/A+A/456/623 : VLT-FLAMES survey of massive stars (Evans+, 2006)
J/ApJ/663/320 : IR-through-UV extinction curve (Fitzpatrick+, 2007)
J/A+A/472/577 : NGC 330 Be stars and binaries (Martayan+, 2007)
J/A+A/462/683 : Velocities in SMC field of NGC 330 (Martayan+, 2007)
J/AJ/140/416 : IR photometry of massive stars in the SMC (Bonanos+, 2010)
J/A+A/509/A11 : Ha emission-line objects in SMC clusters (Martayan+, 2010)
J/MNRAS/424/1925 : Spectroscopic Binarity of O and B type stars (Chini+, 2012)
J/other/Sci/337.444 : RV curves of Galactic massive O stars (Sana+, 2012)
J/ApJ/763/101 : Massive field OB stars in the SMC (Lamb+, 2013)
J/A+A/586/A81 : High-mass X-ray binaries in the SMC (Haberl+, 2016)
J/ApJ/817/113 : RIOTS4 spectro survey of SMC field OB stars (Lamb+, 2016)
J/A+A/624/A66 : Massive runaway and walkaway stars models (Renzo+, 2019)
J/A+A/641/A42 : Main-sequence comp to massive Be stars (Bodensteiner+, 2020)
J/A+A/634/A51 : NGC 330 seen by MUSE (Bodensteiner+, 2020)
J/ApJ/903/43 : Kinematic & fundamental param OB stars (Dorigo Jones+, 2020)
J/A+A/648/A65 : The sHRD of OB stars in NGC 2070 (Castro+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- [M2002] [107/84544] Massey 2002, II/236 SMC catalog
identifier (1)
8- 14 F7.4 deg RAdeg [10/24] Right ascension (J2000)
16- 23 F8.4 deg DEdeg [-74/-71] Declination (J2000)
25- 48 A24 --- SpT Adopted MK spectral type. (2)
50 A1 --- Field Field or Group Star Status (3)
52- 53 A2 --- OBe Classical e star Status (4)
55- 56 I2 Msun mup [11/81]? Calculated stellar mass upper bound (5)
58- 59 I2 Msun mlow [9/69]? Calculated stellar mass lower bound (5)
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Note (1): Massey, 2002ApJS..141...81M 2002ApJS..141...81M (VizieR catalog II/236),
where the identification number is [M2002] SMC NNNNNN in Simbad.
Note (2): Spectral types obtained as described in the text. RIOTS4 OBe
classifications include Arabic numerals corresponding to Lesh, 1968,
III/23 emission classes following the "e" designation.
Note (3): Field or Group membership (see text), denoted as F and G,
respectively.
Note (4): OBe and candidate OBe stars are indicated with "e" and "e?",
respectively. Note that OBe supergiants are also identified.
Note (5): Empty values are those where our method was unable to obtain
a mass estimate.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 20-Jun-2024