J/MNRAS/410/190 Young runaway stars within 3kpc (Tetzlaff+, 2011)
A catalogue of young runaway stars within 3 kpc from Hipparcos
Tetzlaff N., Neuhaeuser R., Hohle M.M.
<Mon. Not. R. Astron. Soc. 410, 190 (2011)>
=2011MNRAS.410..190T 2011MNRAS.410..190T
ADC_Keywords: Stars, early-type ; Stars, pre-main sequence ; Space velocities
Keywords: catalogues - stars: early-type - stars: kinematics
Abstract:
Traditionally runaway stars are O and B type stars with large peculiar
velocities. We want to extend this definition to young stars (up to
∼50Myr) of any spectral type and identify those present in the
Hipparcos catalogue applying different selection criteria such as
peculiar space velocities or peculiar one-dimensional velocities.
Runaway stars are important to study the evolution of multiple star
systems or star clusters as well as to identify origins of neutron
stars. We compile distances, proper motions, spectral types,
luminosity classes, V magnitudes and B-V colours and utilise
evolutionary models from different authors to obtain star ages and
study a sample of 7663 young Hipparcos stars within 3kpc from the
Sun. Radial velocities are obtained from the literature. We
investigate the distributions of the peculiar spatial velocity, the
peculiar radial velocity as well as the peculiar tangential velocity
and its one-dimensional components and obtain runaway star
probabilities for each star in the sample. In addition, we look for
stars that are situated outside any OB association or OB cluster and
the Galactic plane as well as stars of which the velocity vector
points away from the median velocity vector of neighbouring stars or
the surrounding local OB association/cluster although the absolute
velocity might be small. We find a total of 2547 runaway star
candidates (with a contamination of normal Population I stars of 20
per cent at most). Thus, after subtraction of those 20 per cent, the
runaway frequency among young stars is about 27 per cent. We compile
a catalogue of runaway stars which will be available via VizieR.
Description:
We give Tables 1, 4, 5 (two parts) and 6 of the Paper as well as one
additional table summarising all runaway star candidates found.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 74 7663 Ages, masses and spectral types for 7663 young stars
table4.dat 104 2353 Runaway probabilities for 2353 runaway star
candidates as found from their space velocities
table5a.dat 81 326 Runaway probabilities from 3D velocities
table5b.dat 81 321 Runaway probabilities from 2D velocity vectors
table6.dat 74 6 Additional young stars situated well outside
OB associations/clusters and the Galactic plane
all.dat 42 2547 Runaway star candidates identified in the paper
--------------------------------------------------------------------------------
See also:
III/84 : Galactic O Stars (Cruz-Gonzalez+ 1974)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
J/A+A/331/949 : Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 7 I6 --- HIP Hipparcos number
9- 27 A19 --- OName other designation
30- 33 F4.1 solMass Mass ? Mass (median from different evolutionary
models) (1)
36- 39 F4.1 solMass e_Mass ? Median mass deviation (1)
48- 51 F4.1 Myr Age ? Age (median from different evolutionary
models) (1)
56- 59 F4.1 Myr e_Age ? Median age deviation (1)
62- 74 A13 --- SpType MK spectral type
--------------------------------------------------------------------------------
Note (1): if no value is given, the star entered the list due to its
spectral type.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP Hipparcos number
8- 24 A17 --- OName Other designation
26- 29 F4.2 --- PVpec ? Runaway probability
(peculiar 3D spatial velocity vpec)
31- 34 F4.2 --- PU ? Runaway probability (peculiar 1D U)
36- 39 F4.2 --- PV ? Runaway probability (peculiar 1D V)
41- 44 F4.2 --- PW ? Runaway probability (peculiar 1D W)
46- 49 F4.2 --- PRVpec ? Runaway probability
(peculiar 1D radial velocity vrpec)
51- 54 F4.2 --- PVtpec ? Runaway probability
(peculiar 2D tangential velocity vtpec)
56- 61 F6.2 --- PVlpec ? Runaway probability (peculiar 1D vlpec)
63- 68 F6.2 --- PVbpec ? Runaway probability (peculiar 1D vbpec)
70- 74 F5.1 km/s Vpec ? Peculiar spatial velocity
76- 80 F5.1 km/s E_Vpec ? Error on Vpec (upper value)
82- 86 F5.1 km/s e_Vpec ? Error on vpec (lower value)
88- 92 F5.1 km/s Vtpec ? Peculiar tangential velocity
94- 98 F5.1 km/s E_Vtpec ? Error on vtpec (upper value)
100-104 F5.1 km/s e_Vtpec ? Error on vtpec (lower value)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5[ab].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP Hipparcos number (Cat. I/311)
8- 22 A15 --- OName Other designation
26- 29 F4.2 --- Prun Runaway probability (comparison of 3D spatial
velocity vectors of star and association) (1)
31- 40 A10 --- Clust Association or cluster name
42- 46 F5.1 km/s Vpec ? Peculiar spatial velocity
48- 52 F5.1 km/s E_Vpec ? Error on vpec (upper value)
54- 58 F5.1 km/s e_Vpec ? Error on vpec (lower value)
60- 64 F5.1 km/s Vtpec ? Peculiar tangential velocity
66- 70 F5.1 km/s E_Vtpec ? Error on vtpec (upper value)
72- 76 F5.1 km/s e_Vtpec ? Error on vtpec (lower value)
78- 81 A4 --- New "prev" if star present in table4,
"new" otherwise
--------------------------------------------------------------------------------
Note (1): Runaway probability is computed from the comparison of the
velocities of the star and association:
* comparison of 3D spatial velocity vectors in table5a
* comparison of 2D tangential velocity vectors in table5b
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP Hipparcos number (Cat. I/311)
8- 16 A9 --- OName Other designation
18- 21 I4 pc z Distance to the Galactic plane (pc)
23- 25 I3 pc E_z Error on z (pc)
27- 29 I3 pc e_z Error on z (pc)
31- 35 F5.1 km/s Wpec ?=- W velocity component in z direction (1)
37- 40 F4.1 km/s E_Wpec ?=- Error on Wpec (upper value) (1)
42- 45 F4.1 km/s e_Wpec ?=- Error on Wpec (lower value) (1)
47- 50 F4.1 km/s Vpec ?=- Peculiar spatial velocity (1)
52- 54 F3.1 km/s E_Vpec ?=- Error on Vpec (upper value) (1)
56- 59 F4.1 km/s e_Vpec ?=- Error on Vpec (lower value) (1)
61- 64 F4.1 km/s Vtpec ?=- Peculiar tangential velocity
66- 69 F4.1 km/s E_Vtpec ?=- Error on Vtpec (upper value)
71- 74 F4.1 km/s e_Vtpec ?=- Error on Vtpec (lower value)
--------------------------------------------------------------------------------
Note (1): If no value is given ("-") the star has no radial velocity measured.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: all.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP Hipparcos number (Cat. I/311)
8- 12 F5.1 km/s Vpec ?=- Peculiar spatial velocity (1)
14- 18 F5.1 km/s E_Vpec ?=- Error on Vpec (upper value) (1)
20- 24 F5.1 km/s e_Vpec ?=- Error on Vpec (lower value) (1)
26- 30 F5.1 km/s Vtpec Peculiar tangential velocity
32- 36 F5.1 km/s E_Vtpec Error on Vtpec (upper value)
38- 42 F5.1 km/s e_Vtpec Error on Vtpec (lower value)
--------------------------------------------------------------------------------
Note (1): If no value is given ("-") the star has no radial velocity measured.
--------------------------------------------------------------------------------
Author's address:
Nina Tetzlaff, nina(at)astro.uni-jena.de
References:
Stone, 1979ApJ...232..520S 1979ApJ...232..520S,
Kinematics, close binary evolution, and ages of the O stars
(End) Nina Tetzlaff [AIU Jena] 16-Aug-2010