J/MNRAS/411/2596 High Galactic latitude runaway stars (Silva+, 2011)
Ejection velocities of high Galactic latitude runaway stars.
Silva M.D.V., Napiwotzki R.
<Mon. Not. R. Astron. Soc., 411, 2596-2614 (2011)>
=2011MNRAS.411.2596S 2011MNRAS.411.2596S
ADC_Keywords: Stars, early-type ; Stars, nearby ; Space velocities
Keywords: stars: early-type - stars: kinematics and dynamics - Galaxy: halo
Abstract:
We estimate the distribution of ejection velocities for the known
population of high Galactic latitude runaway stars. The initial sample
is a collection of 174 early-type stars selected from the literature.
The stars are first classified according to their evolutionary status
in order to obtain a homogeneous sample of 96 genuine main-sequence
stars. Their present velocities and flight times are then estimated
using proper motion data from various astrometric catalogues
(including Tycho-2, UCAC2 and USNO-B) and the ejection velocities are
computed by tracing their orbits back in time, based on a Galactic
potential. The potential used is constructed from a mass density model
chosen to fit the most recent observational constraints.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 95 48 Input data for stars belonging to group A
tableb2.dat 95 48 Input data for stars belonging to group B
refs.dat 79 20 References
tableb3.dat 164 48 Computed values for stars belonging to group A
tableb4.dat 164 48 Computed values for stars belonging to group B
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See also:
J/A+A/331/949 : Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)
J/A+A/402/801 : Runaway carbon stars of Blanco+McCarthy field 37 (Loup+ 2003)
J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)
Byte-by-byte Description of file: tableb1.dat tableb2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name
15- 18 I4 km/s RV Radial velocity
20- 21 I2 km/s e_RV rms uncertainty on RV
23- 24 I2 --- r_RV Reference for RV, in refs.dat file
26- 31 F6.2 mas/yr pmRA Proper motion along RA, pmRA*cosDE
33- 36 F4.2 mas/yr e_pmRA rms uncertainty on pmRA
38- 43 F6.2 mas/yr pmDE Proper motion along DE
45- 48 F4.2 mas/yr e_pmDE rms uncertainty on pmDE
50- 53 F4.2 [cm/s2] logg Surface gravity
55- 58 F4.2 [cm/s2] e_logg rms uncertainty on logg
60- 61 I2 --- r_logg Reference for logg, in refs.dat file
63- 67 I5 K Teff Effective temperature
69- 72 I4 K e_Teff rms uncertainty on TEff
74- 75 I2 --- r_Teff Reference for Teff, in refs.dat file
77- 80 F4.1 Msun Mass Mass of the star
82- 84 F3.1 Msun E_Mass Error on Mass (upper value)
86- 88 F3.1 Msun e_Mass Error on Mass (lower value)
90- 92 I3 km/s vsini ? Rotational velocity
93 A1 --- u_vsini [?] Uncertainty flag on vsini
94- 95 I2 --- r_vsini ? Reference for vsini, in refs.dat file
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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- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 43 A20 --- Aut Author's name
45- 79 A35 --- Com Comments
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Byte-by-byte Description of file: tableb3.dat tableb4.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name
15- 20 F6.2 kpc X Galactocentric X position
22- 25 F4.2 kpc E_X Error on X (upper limit)
27- 30 F4.2 kpc e_X Error on X (lower limit)
32- 37 F6.2 kpc Y Galactocentric Y position
39- 42 F4.2 kpc E_Y Error on Y (upper limit)
44- 47 F4.2 kpc e_Y Error on Y (lower limit)
48- 53 F6.2 kpc Z Galactocentric Z position
55- 58 F4.2 kpc E_Z Error on Z (upper limit)
60- 63 F4.2 kpc e_Z Error on Z (lower limit)
65- 69 F5.2 kpc r Heliocentric distance
71- 74 F4.2 kpc E_r Error on r (upper limit)
76- 79 F4.2 kpc e_r Error on r (lower limit)
81- 85 F5.1 Myr Age Evolutionnary age
87- 91 F5.1 Myr E_Age Error on Age (upper limit)
93- 97 F5.1 Myr e_Age Error on Age (lower limit)
99-103 F5.1 Myr tfl Flight time (time the star spent on the orbit
after ejection)
105-109 F5.1 Myr E_tfl Error on tfl (upper limit)
111-114 F4.1 Myr e_tfl Error on tfl (lower limit)
116-118 I3 km/s Vej Ejection velocity
120-122 I3 km/s E_Vej Error on Vej (upper limit)
124-126 I3 km/s e_Vej Error on Vej (lower limit)
128-133 F6.2 kpc X0 X0 position of the point of ejection in the
galactic plane
135-139 F5.2 kpc E_X0 Error on X0 (upper limit)
141-145 F5.2 kpc e_X0 Error on X0 (lower limit)
147-152 F6.2 kpc Y0 Y0 position of the point of ejection in the
galactic plane
154-158 F5.2 kpc E_Y0 Error on Y0 (upper limit)
160-164 F5.2 kpc e_Y0 Error on Y0 (lower limit)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 13-Oct-2011