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J/A+AS/122/507 Kinematics of SMC carbon stars (Hatzidimitriou+ 1997)
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Kinematics of carbon stars in the outer regions of the Small Magellanic Cloud
Hatzidimitriou D., Croke B.F., Morgan D.H., Cannon R.D.
<Astron. Astrophys. Suppl. Ser. 122, 507 (1997)>
=1997A&AS..122..507H (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, carbon ; Magellanic Clouds
Keywords: stars: carbon stars - galaxies: kinematics - Magellanic Clouds
Abstract:
We present a radial velocity survey of a sample of the field
population of carbon stars in the outer parts of the Small Magellanic
Cloud (SMC). This first set of results includes radial velocities for
71 carbon stars, with an individual precision of +/-2-5km/s. The mean
heliocentric velocity of the stars (excluding one very high velocity
star) is 149.3+/-3.0km/s with a velocity dispersion of 25.2+/-2.1km/s.
These values drop to 145.5+/-2.7km/s and 20.6+/-1.9km/s respectively,
if we exclude the stars belonging to the Outer Wing. The velocity
distribution does not show the multiple peaks seen in some samples of
Population I objects. The mass of the SMC as inferred from the above
velocity dispersion (without the outer Wing stars) is
=~1.2x10^9^M_{sun}_.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1a 47 76 The sample of SMC carbon stars observed
table1b 47 16 *The sample of 16 LMC stars
table1.tex 66 176 LaTex version of table1
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Note on table1b: The positions of these stars are approximate. The final
positions will be presented elsewhere.
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See also:
J/A+AS/97/603 : C stars in SMC (RAW93)
J/A+AS/113/539 : A survey of carbon stars in the SMC (Morgan+, 1995)
Byte-by-byte Description of file: table1a table1b
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Bytes Format Units Label Explanations
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1- 6 A6 --- MH Star name (1)
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 17 F4.1 s RAs Right ascension (J2000)
19 A1 --- DE- Declination sign
20- 21 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 27 I2 arcsec DEs Declination (J2000)
29- 33 F5.2 deg Dist Projected radial distance of each star from
the dynamical centre of the SMC (2)
35 I1 --- o_Dist Number of observations secured in each case
37- 41 F5.1 km/s HRV Derived heliocentric radial velocity (LSR)
43- 45 F3.1 --- ccp Height of the cross-correlation peak
47 I1 --- Obs Run during which the observations were made
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Note (1): In table1a, names from the Morgan and Hatzidimitriou (1995,
Cat. <J/A+AS/113/539>) catalogue
Note (2): 1 degree corresponds to approximately 1kpc at the distance of the SMC
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Acknowledgements: Despina Hatzidimitriou <dh@physics.uch.gr>
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(End) Patricia Bauer [CDS] 03-Sep-1996