Access to Astronomical Catalogues

J/ApJ/535/325       Spectra of normal stars in the J-band    (Wallace+ 2000)
Near-infrared classification spectroscopy: J-band spectra of fundamental MK
standards.
    Wallace L., Meyer M.R., Hinkle K., Edwards S.
   <Astrophys. J., 535, 325-337 (2000)>
   =2000ApJ...535..325W
ADC_Keywords: Atlases ; Spectra, infrared ; Stars, normal

Keywords: infrared: stars - line: identification - stars: fundamental parameters


Abstract:
    We present a catalog of J-band spectra for 88 fundamental MK standard
    stars observed at a resolving power of R∼3000. This contribution
    serves as a companion atlas to the K-band spectra recently published
    by Wallace & Hinkle (1997, Cat. J/ApJS/111/445) and the H-band atlas
    by Meyer and coworkers. We report data from 7400 to 9550cm-1
    (1.05-1.34um) for stars of spectral types O7-M6 and luminosity classes
    I-V as defined in the MK system. In reducing these data, special care
    has been taken to remove time-variable telluric features of water
    vapor. We identify atomic and molecular indexes that are both
    temperature and luminosity sensitive that aid in the classification of
    stellar spectra in the J band. In addition to being useful in the
    classification of late-type stars, the J band contains several
    features of interest in the study of early-type stellar photospheres.

Description:
    The observations were obtained with the Mayall 4m telescope at Kitt
    Peak National Observatory in Arizona.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        88       88   Journal of Observations
table4.dat        82       65   Equivalent Widths of Spectral Indexes
sp/*              27       66   Individual spectra


See also:
  J/ApJS/111/445 : Spectra of normal stars in the K band (Wallace+ 1997)
  J/ApJ/508/397  : H-band Spectral Standards  (Meyer+ 1998)
  J/AJ/124/3393  : Spectra of normal stars in the L-band (Wallace+, 2000)
  http://www.noao.edu/archives.html : NOAO Data Archives, includes
       "A Library of Medium Resolution Infrared Stellar Spectra"


Byte-by-byte Description of file: table1.dat

   Bytes Format Units        Label      Explanations

   1-  7  A7    ---          Star       Star name
   9- 11  A3    ---          n_Star     Note on Star (1)
  14- 27  A14   ---          Name       Other name
  29- 40  A12   ---          SpType     MK spectral type
      41  A1    ---          n_SpType   [e] Note on SpType (1)
  43- 52  A10   "YYYY/DD/MM" Obs.Date   Observation date
      53  A1    ---          ---        [,]
  54- 55  I2    ---          Day2       ? Second day of observation
      57  A1    ---          S1         [b] Spectrum selected (1)
  59- 68  A10   "YYYY/DD/MM" Obs.Date2  Second date  of observation
      70  A1    ---          S2         [b] Spectrum selected (1)
  72- 81  A10   "YYYY/DD/MM" Obs.Date3  Third date  of observation
  83- 88  A6    ---          spFile     Name of the file containing the spectrum
                                        (in the "sp" subdirectory)

Note (1): Notes as follows:
      a = Denotes spectra that also appear in the H-band atlas of
          Meyer et al., 1998, Cat. J/ApJ/508/397
      c = Taken from Henry et al., 1994AJ....108.1437H
      d = Taken from Jaschek et al., 1964, Cat. III/18
      e = Previously classified as G0Ia but is intrinsically brighter
      b = Denotes highest S/N data selected for indexes listed in Table 4


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

   Bytes Format Units   Label     Explanations

   1-  7  A7    ---     Star      Star name
   9- 13  I5    K       Teff      Effective temperature
  15- 22  A8    ---     Class     MK luminosity class
  24- 28  F5.2  cm-1    W(AlI)    AlI equivalent width
  30- 34  F5.2  cm-1    W(MnI)    MnI equivalent width
  36- 39  F4.2  cm-1    W(Pab)    Paβ equivalent width
  41- 45  F5.2  cm-1    W(HeI)    HeI equivalent width
  47- 51  F5.2  cm-1    W(SiI)    SiI equivalent width
  53- 57  F5.2  cm-1    W(MgI)    MgI equivalent width
  59- 63  F5.2  cm-1    W(FeI)    FeI equivalent width
  65- 69  F5.2  cm-1    W(CNTiO)  CN and TiO equivalent width
  71- 75  F5.2  cm-1    W(CI)     CI equivalent width
  77- 82  A6    ---     spFile    Name of the file containing the spectrum in
                                   sp subdirectory


Byte-by-byte Description of file: sp/*

   Bytes Format Units   Label     Explanations

   4- 14  F11.6 cm-1    Wave      [7250.5/9901] Wavenumber (1)
  16- 27  E12.7 ---     Int       ?=-1 Processed intensity values (2)

Note (1): The point spacing is uniform in wavenumbers but have not been
     interpoled onto a grid starting at an even fraction of a wavenumber.
Note (2): Any points that are out of range because of opaque telluric
     lines, etc. have been replaced with -1.00000E+00.


History:
    Copied at ftp://ftp.noao.edu/catalogs/medresIR/J_band/
(End)                                      Patricia Vannier [CDS]    26-Feb-2005