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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
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) 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:

       FileName      Lrecl  Records   Explanations

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


See also:
  J/MNRAS/369/751 : Near-infrared photometry of carbon stars (Whitelock+, 2006)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   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


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   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

Note (1): Source for periods if not GCVS and near-IR observations as follows:
      A = Pojmaski (2003AcA....53..341P) & Pojmaski & Maciejewski
          (2004AcA....54..153P), Cat. II/264.
      B = Le Bertre (1992A&AS...94..377L)
      C = mean of J and N;
      G = Groenewegen et al. (1998MNRAS.293...18G)
      J = Jones et al. (1990ApJS...74..785J)
      H = Perryman et al., HIP (1997, Cat. I/239)
      N = Nakashima et al. (2000PASJ...52..275N)
      O = Olivier, Whitelock & Marang (2001MNRAS.326..490O)
      D = Dahlmark (1993IBVS.3855....1D, 1996IBVS.4329....1D) Cat. II/238
      M = 2MASS, Cat. II/246
      P = Noguchi et al. (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


Byte-by-byte Description of file: table4.dat

   Bytes Format Units   Label     Explanations

       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

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)
          is used


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    19-Jan-2007