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J/ApJ/711/1236     Equivalent width of H2 from FUSE           (Jensen+, 2010)
Observational properties of rotationally excited molecular hydrogen in
translucent lines of sight.
    Jensen A.G., Snow T.P., Sonneborn G., Rachford B.L.
   <Astrophys. J., 711, 1236-1256 (2010)>
   =2010ApJ...711.1236J
ADC_Keywords: Equivalent widths ; Extinction ; Interstellar medium ;
              Ultraviolet
Keywords: ISM: molecules - ultraviolet: ISM


Abstract:
    The Far Ultraviolet Spectroscopic Explorer (FUSE) has allowed precise
    determinations of the column densities of molecular hydrogen (H2) in
    Galactic lines of sight with a wide range of pathlengths and
    extinction properties. However, survey studies of lines of sight with
    greater extinction have been mostly restricted to the low-J states
    (lower total angular momentum) in which most molecular hydrogen is
    observed. This paper presents a survey of column densities for the
    molecular hydrogen in states of greater rotational excitation (J≥2)
    in Galactic lines of sight with log N(H2)≳20. This study is
    comprehensive through the highest excited state detectable in each
    line of sight. J=5 is observed in every line of sight, and we detect
    J=7 in four lines of sight, J=8 in one line of sight, and
    vibrationally excited H2 in two lines of sight.

Description:
    The spectra under examination are taken from the FUSE archives (the
    Far Ultraviolet Spectroscopic Explorer operated from 1999 through
    2007). We have selected a sample of 22 lines of sight from the FTCS
    (FUSE Translucent Cloud Survey).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
sample.dat        63       22   Lines of sight: stellar and reddening data
                             (tables 1 and 2 of the paper)
ew.dat            32     3586   Measured equivalent widths (table 3 of the paper)


See also:
   VI/129 : The FUSE Observation Log (FUSE, 1999-2007)
   J/ApJS/163/282 : Molecular hydrogen column densities (Wakker+, 2006)
   http://astro.uchicago.edu/~dwelty/coldens.html : Online catalogue of ISM
                                                    column densities


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

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     Name      Star name
  11- 18  A8    ---     SpType    MK spectral type
  20- 25  F6.2  deg     GLON      Galactic longitude
  27- 32  F6.2  deg     GLAT      Galactic latitude
  34- 37  I4    pc      dist      ? Distance
      39  I1    ---     r_dist    ? Distance reference (1)
  41- 44  F4.2  mag     E(B-V)    Color excess
  46- 47  I2    ---     r_E(B-V)  E(B-V) reference (1)
  49- 52  F4.2  mag     Av        V-band interstellar extinction AV
  54- 55  I2    ---     r_Av      Av reference (1)
  57- 60  F4.2  mag     Rv        V-band interstellar extinction
                                  (RV=AV/E(B-V))
  62- 63  I2    ---     r_Rv      Rv reference (1)

Note (1): References as follows:
   1 = From the DIBS database, http://dib.uiuc.edu/, values compiled by
       L. M. Hobbs, spectroscopic distance modulus.
   2 = Hipparcos value of 4σ significance or better.
   3 = Savage et al. 1985, Cat. II/114.
   4 = From the DIBS database, http://dib.uiuc.edu/, values compiled by
       L. M. Hobbs, stellar association.
  11 = Diplas & Savage 1994, Cat. J/ApJS/93/211.
  12 = Rachford et al. 2002ApJ...577..221R; if AV, ref. (16) also applies.
  13 = From the DIBS database, http://dib.uiuc.edu/, values by the DIBS team.
  14 = Rachford et al. 2009ApJS..180..125R; if AV, ref. (16) also applies.
  15 = Valencic et al. 2004ApJ...616..912V.
  16 = Calculated through the definition RV=AV/EB-V using values from the
       other two columns.
  17 = RV not independently measured and is assumed to be the Galactic average
       of 3.1.
  18 = Neckel et al. 1980, Cat. II/62.
  19 = Aiello et al. 1988, Cat. III/130.


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

   Bytes Format Units     Label   Explanations

   1-  9  A9    ---       Name    Star name
  11- 18  F8.3  0.1nm     lambda  Wavelength of transition; in Angstroms
      20  I1    ---       J       The J level of transition
  22- 26  F5.1  10-13m    EW      ? Measured equivalent width (mÅ)
  28- 32  F5.1  10-13m    e_EW    ? Uncertainty in measured equivalent width


History:
    From electronic version of the journal
(End)                 Greg Schwarz [AAS], Emmanuelle Perret [CDS]    05-Apr-2012