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Table 1.

Basic information about working sample of fast-rotating O-type stars extracted from the multi-epoch spectroscopy, TESS and Gaia data, as well as some other specific studies from the literature.

Name SpC v sin i RVPP σRV SB tag Phot. var. X-ray Contamination Runaway? Final binary
[km s−1] [km s−1] [km s−1] (TESS) log(LX/LBOL) (1′ and 1′–2′) (Gaia+lit.) status
BD+36°4145 O8.5 V(n) 200 ± 3 3.5 ± 1.1 1.2 LPV SLF 0+0 no LS
HD 216532 O8.5 V(n) 200 ± 3 15.0 ± 3.8 3.8 LPV PQ (+fr>5) 0+1 no LS
HD 163892 O9.5 IV(n) 201 ± 12 83.50 ± 9.1 26.3 SB1 _ 0+0 no SB1 (†)
HD 210839 O6.5 I(n)fp 201 ± 8 28.5 ± 5.5 6.3 LPV/SB1? SLF −7.10 (a) 0+0 yes LS (*)
HD 308813 O9.7 IV(n) 205 ± 5 41.5 ± 6.7 15.4 SB1 ? −7.36 (l) 0+1 no SB1
HD 36879 O7 V(n)((f)) 205 ± 6 10.0 ± 2.5 3.2 LPV SLF 0+0 yes LS
HD 37737 O9.5 II-III(n) 209 ± 11 156.5 ± 9.9 48.3 SB1 EB _ no SB1
HD 152200 O9.7 IV(n) 210 ± 32 32.0 ± 6.5 12.8 SB1 RM −6.99 (b) 0+1 no SB1
HD 97434 O7.5 III(n)((f)) 215 ± 22 14.5 ± 3.5 6.1 LPV SLF −6.69 (b) 0+2 no LS
HD 24912 O7.5 III(n)((f)) 224 ± 8 29.0 ± 4.7 6.2 LPV/SB2? _ −7.09 (c) 0+0 yes LS (*)
BD+60°2522 O6.5 (n)fp 231 ± 23 24.5 ± 5.8 8.4 LPV/SB2? SPB ∼ − 7.0 (k) 0+0 yes LS (*)
HD 89137 ON9.7 II(n) 233 ± 3 3.0 ± 1.3 1.3 LPV SLF (+fr>5) _ yes LS
BD+60°134 O5.5 V(n)((f)) 234 ± 9 (*) 7.5 ± 3.4 3.0 LPV SLF _ yes LS
HD 172175 O6.5 I(n)fp 243 ± 20 19.5 ± 7.7 9.7 LPV _ _ yes LS
HD 165246 O8 V(n) 254 ± 8 126.0 ± 14.9 36.3 SB1 EB 1+0 no SB1
HD 5689 O7 Vn((f)) 256 ± 40 12.0 ± 3.4 4.2 LPV SLF 0+0 yes LS
HD 124314 O6 IV(n)((f)) 256 ± 10 33.0 ± 10.2 9.9 LPV/SB2? SLF 2+0 no LPV/SB2?
HD 192281 O4.5 IV(n)(f) 261 ± 5 (*) 19.5 ± 8.6 5.6 LPV SLF + rot? 0+0 yes LS
HD 76556 O6 IV(n)((f))p 264 ± 11 10.5 ± 7.3 4.4 LPV SLF + rot? −7.09 (i) 1+1 no LS
HD 41997 O7.5 Vn((f)) 272 ± 12 23.5 ± 4.8 6.0 LPV SLF 0+0 yes LS
HD 124979 O7.5 IV(n)((f)) 273 ± 6 12.0 ± 3.3 3.8 LPV SLF _ yes LS
HD 155913 O4.5 Vn((f)) 282 ± 10 (*) 8.5 ± 8.0 3.1 LPV SLF + rot? 0+0 yes LS
HD 175876 O6.5 III(n)(f) 282 ± 16 35.5 ± 6.9 10.2 LPV/SB2? _ 0+0 yes LS (*)
HD 15137 O9.5 II-IIIn 283 ± 7 44.0 ± 6.3 10.8 LPV/SB1? SLF 0+0 yes SB1 (*)
HD 28446A O9.7 IIn 291 ± 10 29.0 ± 7.5 7.0 LPV SLF (+fr>5) 1+0 no LS
HD 15642 O9.5 II-IIIn(*) 293 ± 10 23.5 ± 6.6 7.6 LPV SLF 0+1 yes LS
HD 90087 O9.2 III(n) 295 ± 2 11.5 ± 3.4 4.3 LPV _ _ no LS
HD 165174 O9.7 IIn 299 ±11 59.5 ± 7.4 18.3 SB1 _ −6.9 (d) 0+0 no SB1
HD 52266 O9.5 IIIn 299 ± 7 35.0 ± 6.0 10.1 LPV SLF 0+0 no LPV/SB1? (*)
HD 91651 ON9.5 IIIn 304 ± 16 21.5 ± 5.8 6.2 LPV/SB2? β Cep 0+0 no LPV/SB2?
HD 228841 O6.5 Vn((f)) 311 ± 8 (*) 18.0 ± 7.3 5.5 LPV SLF −7.25 (i) _ yes LS
HD 52533 O8.5 IVn(*) 312 ± 14 166.0 ± 27.7 54.4 SB1 EB 3+0 no SB1 (†)
BD+60°513 O7 Vn 313 ± 11 (*) 27.5 ± 7.4 12.2 LPV SLF + rot? −7.56 (e) 1+0 no LS
HD 229232 O4 Vn((f)) 313 ± 11 (*) 36.0 ± 17.7 13.4 LPV SLF + rot? 1+0 yes LS
HD 13268 ON8.5 IIIn 316 ± 10 21.0 ± 5.4 5.2 LPV _ 0+0 yes LS
HD 14442 O5 n(f)p 320 ± 14 (*) 15.0 ± 10.7 7.0 LPV SPB? 0+1 no LS
HD 41161 O8 Vn 322 ± 8 10.5 ± 3.8 3.0 LPV SLF 0+0 yes LS
HD 149452 O9 IVn 323 ± 14 1.5 ± 1.2 0.8 LPV SLF 1+0 yes LS
HD 203064 O7.5 IIIn((f)) 323 ± 8 42.0 ± 8.7 10.6 LPV/SB1? SLF 0+0 yes LS (*)
HD 326331 O8 IVn((f)) 323 ± 7 17.5 ± 5.2 4.4 LPV SLF −6.80 (f) 2+2 no LS
HD 46485 O7 V((f))nvar? 334 ± 16 29.5 ± 13.6 9.1 LPV EB+RM 0+0 no SB1 (*)
HD 46056A O8 Vn 365 ± 26 (*) 29.0 ± 11.6 8.6 LPV PQ (+fr>5) 1+0 no LS
HD 117490 ON9.5 IIInn 369 ± 10 17.0 ± 6.6 4.8 LPV SLF (+fr>5) 0+2 yes LS
HD 102415 ON9 IV:nn 376 ± 4 35.0 ± 10.8 12.0 LPV SLF (+fr>5) 0+1 no LS
HD 93521 O9.5 IIInn 379 ± 14 (*) 48.5 ± 8.0 11.2 LPV SLF (+fr>5) −8.7...9.4 (g) 0+0 yes LS
HD 217086 O7 Vnn((f))z 394 ± 9 15.5 ± 8.3 4.9 LPV SLF ∼ − 7.0 (j) 0+0 no LS
HD 14434 O5.5 IVnn(f)p 395 ± 12 (*) 21.0 ± 11.1 8.5 LPV SLF −6.77 (h) 0+0 yes LS
HD 191423 ON9 II-IIInn(*) 397 ± 18 37.5 ± 9.6 9.6 LPV SLF 0+0 yes LS
HD 149757 O9.2 IVnn 400 ± 8 32.0 ± 9.5 4.7 LPV _ −7.13 (c) 0+0 yes LS
ALS 12370 O6. 5Vnn((f)) 444 ± 13 (*) 15.0 ± 11.8 5.6 LPV SLF + rot/EV? _ no LS

Notes. The list of targets is ordered by increasing v sin i. In this table we list the measurements of peak-to-peak amplitude of variation (RVPP) and standard deviation (σRV) of all radial velocity measurements for each star. Apart from this, we indicate the spectroscopic binary and runaway status (‘SB tag’ and ‘runaway?’ columns, respectively), the type of detected photometric variability (‘phot. var.’ column), the relative X-ray flux (‘X-ray’ column), and the number of detected visual companions within 1 arcmin and between 1 and 2 arcmin, respectively (‘contamination’ column). In the column ‘final binary status’ we indicate our final decision regarding spectroscopic binary status. Eclipsing and spectroscopic binaries in the sample, as well as those stars identified to show ellipsoidal variability in the TESS light curves are highlighted in bold. v sin i: In those stars marked with (*) the use of the He II 5411 line was necessary to estimate the v sin i; SB tag: LPV – line profile variable; SB1, SB2 – one or two spectroscopic binary respectively; LPV/SB1?, LPV/SB2? – uncertain spectroscopic binaries; Phot. var.: SPB/β Cep – coherent low/high frequency variability, respectively; SLF – stochastic low frequency variability; EB – eclipsing binary; EV – ellipsoidal variable; rot? – possible rotational modulation; RM – reflection modulation; PQ – poor quality of the TESS light curve; fr> 5 – existence of prominent peaks at frequencies larger than 5 d−1; _ – no TESS data or no data regarding visual components; “?" – unknown periodic photometric modulation. Final binary status: LS – likely/apparently single star. Those stars marked with a (*) symbol have changed their SB status (compared to Col. 5) after taking into account all available empirical information (see Sect. 3.3.1 for details). In addition, although we keep them as SB1 for the purposes of this paper, Mahy et al. (2022) have identified faint lines of a secondary component using a disentangling technique in a much larger spectroscopic data set in those stars marked with a (†).

References. X-ray: (a)Rauw et al. (2015), HD 308813 Nazé et al. (2013), (b)Nazé (2009), Bhatt et al. (2010), (c)Nazé & Motch (2018), Cohen et al. (2021), (d)Nazé et al. (2020), (e)Rauw & Nazé (2016), (f)Sana et al. (2006), Nazé (2009), (g)Rauw et al. (2012), (h)Nazé (2009), (i)this work, (j)Getman et al. (2006), (k)Toalá et al. (2020), (l)Nazé et al. (2013).

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