J/MNRAS/369/783 Radial velocities & distances of carbon stars (Menzies+, 2006)
Carbon-rich Mira variables: radial velocities and distances.
Menzies J.W., Feast M.W., Whitelock P.A.
<Mon. Not. R. Astron. Soc., 369, 783-790 (2006)>
=2006MNRAS.369..783M 2006MNRAS.369..783M
ADC_Keywords: Stars, carbon ; Radial velocities ; Stars, distances
Keywords: stars: AGB and post-AGB - stars: carbon - stars: distances -
stars: variables: other - Galaxy: kinematics and dynamics
Abstract:
Optical radial velocities have been measured for 38 C-type Mira
variables (C-Miras). These data together with others in the literature
are used to study the differences between optical and CO millimetre
(mm) observations for C-Miras and the necessary corrections to the
optical velocities are derived in order to obtain the true radial
velocities of the variables. The difference between absorption and
emission-line velocities is also examined. A particularly large
difference (+30km/s) is found in the case of the Hα line. A
catalogue is given of 177 C-Miras with estimated distances and radial
velocities. The distances are based on bolometric magnitudes derived
in Paper I (Whitelock et al., 2006, Cat. J/MNRAS/369/751) using
South African Astronomical Observatory (SAAO) observations or (for 60
of the stars) using non-SAAO photometry. In the latter case, the
necessary transformations to the SAAO system are derived. These data
will be used in Paper III (Feast et al., 2006MNRAS.369..791F 2006MNRAS.369..791F) to study
the kinematics of the C-Miras.
Description:
All SAAO spectra were obtained with the Unit Spectrograph attached to
the 1.9-m telescope at Sutherland. A SITe 1798x266-pixel CCD with
13-m pixels was used in the spectrograph camera.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 41 68 New heliocentric radial velocities
table3.dat 77 60 Non-SAAO photometry converted to the SAAO system
table4.dat 52 177 Distance and velocity data
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See also:
J/MNRAS/369/751 : Near-infrared photometry of carbon stars (Whitelock+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name
17- 21 F5.1 km/s Vabs ? Absorption velocity
26- 31 F6.2 km/s Vem ? Emission velocity
33- 41 F9.1 d JD Julian date of observation
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Name Star name
18- 27 A10 --- IRAS IRAS number
29- 33 F5.2 mag Jmag ? J magnitude
35- 39 F5.2 mag Hmag ? H magnitude
41- 45 F5.2 mag Kmag ? K magnitude
47- 51 F5.2 mag Lmag ? L magnitude (3.5µm)
53- 56 F4.2 mag AV Absorption in V band
58- 61 F4.2 mag mbol Bolometric apparent magnitude
63- 64 I2 --- NIR Number of near-IR observations used
66- 68 I3 d Per Period
70 A1 --- r_Per Source for Period if not GCVS (1)
72- 75 A4 --- r_NIR Source for near-IR observations (1)
77 A1 --- MSX [X] X when MSX data were used
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Note (1): Source for periods if not GCVS and near-IR observations as follows:
A = Pojmaski (2003AcA....53..341P 2003AcA....53..341P) & Pojmaski & Maciejewski
(2004AcA....54..153P 2004AcA....54..153P), Cat. II/264.
B = Le Bertre (1992A&AS...94..377L 1992A&AS...94..377L)
C = mean of J and N;
G = Groenewegen et al. (1998MNRAS.293...18G 1998MNRAS.293...18G)
J = Jones et al. (1990ApJS...74..785J 1990ApJS...74..785J)
H = Perryman et al., HIP (1997, Cat. I/239)
N = Nakashima et al. (2000PASJ...52..275N 2000PASJ...52..275N)
O = Olivier, Whitelock & Marang (2001MNRAS.326..490O 2001MNRAS.326..490O)
D = Dahlmark (1993IBVS.3855....1D 1993IBVS.3855....1D, 1996IBVS.4329....1D 1996IBVS.4329....1D) Cat. II/238
M = 2MASS, Cat. II/246
P = Noguchi et al. (1981PASJ...33..373N 1981PASJ...33..373N)
T = Taranova & Shenavrin (2004, Cat. J/PAZh/30/605>)
E = ESO (see Section 4)
S = SAAO from Paper I, Whitelock et al., 2006, Cat. J/MNRAS/369/751
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 I1 --- n_Name [1/3] JHKL photometry (1)
3- 18 A16 --- Name Star name
19- 23 F5.2 kpc Dist1 Distance for ZP=1.87 (2)
25- 28 F4.2 mag AV1 Absorption in V band for ZP=1.87 (2)
30- 34 F5.2 kpc Dist2 Distance for ZP=2.06 (3)
36- 39 F4.2 mag AV2 Absorption in V band for ZP=2.06 (3)
41- 43 I3 d Per Period
45- 50 F6.1 km/s Vlsr LSR velocity
52 A1 --- n_Vlsr [co] Vlsr determined from from (c) CO mm
or (o) optical/near-IR
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Note (1): Note as follows:
1 = Stars with JHKL photometry in Paper I, (Whitelock et al., 2006,
Cat. J/MNRAS/369/751
3 = Stars with JHKL photometry in Table 3
Note (2): Zero-point is derived from an adopted LMC modulus of 18.50
Note (3): Zero-point derived in Paper III (Feast et al., 2006MNRAS.369..791F 2006MNRAS.369..791F)
is used
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Jan-2007