1996A&A...305..825V


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.11CEST08:18:18

1996A&A...305..825V - Astronomy and Astrophysics, volume 305, 825-834 (1996/1-3)

OB-runaways as a result of massive star evolution.

VAN RENSBERGEN W., VANBEVEREN D. and DE LOORE C.

Abstract (from CDS):

We investigated four OB-associations and tried to model six runaways which were possibly ejected from these associations. From the position and space velocity of each runaway we tried to trace back its birthplace and birthdate in the subgroup of the parent association where the runaway started its space travel. We used massive star evolutionary results to check if all known parameters of the runaway star can be explained: its atmospheric hydrogen abundance and the fact that its position in the HRD, i.e. spectral type and luminosity is hit by the evolutionary track at the correct time. It is found that the runaway ζ Oph can be modeled only by the binary scenario, where the secondary was ejected after the SN event of its primary out of Upp Cen Lup. ζ Pup can be explained by single star evolution only when it was ejected from Vela R2, implying a luminosity that is significantly higher than commonly used. A binary scenario for ζ Pup can be found provided that the binary was a field star. The three runaways of Orion can be modeled by binary evolution with ejection from the subgroup Ori OB1a. For two of them, single star evolution with ejection from Ori OB1c works equally well. Finally, the OB-runaway optical component of Vela X-1 is still bound to its SN remnant and thus certainly a result of binary evolution. The system originated presumably in Vela OB1.

Abstract Copyright:

Journal keyword(s): stars: kinematics - early type - evolution - supernovae - blue stragglers - mass-loss - open clusters and associations - binaries: close

Simbad objects: 25

goto View the reference in ADS

Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 53 Ari bC* 03 07 25.6726547580 +17 52 47.971172068 5.18 5.997 6.117     B1.5V 133 1
2 V* AE Aur Or* 05 16 18.1489437436 +34 18 44.347016027 5.48 6.18 5.96     O9.5V 533 1
3 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 242 0
4 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1509 1
5 Ass Ori OB 1c As* 05 35 21 -05 20.5           ~ 129 1
6 NAME Ori I As* 05 38 -02.8           ~ 570 0
7 * mu. Col V* 05 45 59.8953630749 -32 18 23.164726112 3.84 4.90 5.18 5.30 5.57 O9.5V 465 0
8 Ass Pup OB 1 As* 07 53 -26.8           ~ 24 0
9 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1109 1
10 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 224 0
11 NAME Vela R1 As* 08 28 -45.0           ~ 5 0
12 HD 73882 EB* 08 39 09.53412 -40 25 09.2608 7.07 7.59 7.19 6.67 6.30 O8.5IV 224 2
13 Ass Vel OB 1 As* 08 49.9 -45 00           ~ 94 0
14 Ass Vel R 3 As* 08 52 -49.0           ~ 4 0
15 HD 76556 * 08 55 07.1450998466 -47 36 27.155801455 8.03 8.61 8.20 8.90   O6IV(n)((f))p 71 1
16 NAME Vela R2 As* 09 00 -43.0           ~ 25 0
17 V* GP Vel HXB 09 02 06.8610736194 -40 33 16.896402010 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1393 0
18 * del Cen Be* 12 08 21.4976373 -50 43 20.738614 1.51 2.39 2.52 2.48 2.62 B2Vne 294 0
19 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 381 1
20 NAME Upper Sco Association As* 16 12 -23.4           ~ 1096 1
21 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1169 1
22 * chi Oph Be* 16 27 01.4349892 -18 27 22.493784 3.95 4.71 4.43 3.97 3.73 B2Vne 572 0
23 * zet Oph Be* 16 37 09.5390545 -10 34 01.529471 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1753 2
24 Ass Ori OB 1a As* ~ ~           ~ 205 0
25 NAME Cen-Crux As* ~ ~           ~ 25 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 1996A&A...305..825V and select 'bookmark this link' or equivalent in the popup menu


2021.05.11-08:18:18

© Université de Strasbourg/CNRS

    • Contact