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J/ApJ/709/424     HII regions identified with WMAPS and GLIMPSE  (Murray+, 2010)
Star formation in massive clusters via the Wilkinson Microwave Anisotropy Probe
and the Spitzer GLIMPSE survey.
    Murray N., Rahman M.
   <Astrophys. J., 709, 424-435 (2010)>
   =2010ApJ...709..424M
ADC_Keywords: H II regions ; Milky Way ; Interstellar medium ;
              Infrared sources ; Radio sources
Keywords: Galaxy: fundamental parameters - H II regions - ISM: bubbles -
          stars: formation

Abstract:
    We use the Wilkinson Microwave Anisotropy Probe (WMAP) maximum entropy
    method foreground emission map combined with previously determined
    distances to giant HII regions to measure the free-free flux at Earth
    and the free-free luminosity of the Galaxy. We find a total flux
    fν=54211Jy and a flux from 88 sources of fν=36043Jy. The
    bulk of the sources are at least marginally resolved, with mean radii
    ∼60pc, electron density ne∼9cm-3, and filling factor
    ΦHII∼0.005 (over the Galactic gas disk). We use GLIMPSE and
    Midcourse Space Experiment (MSX) 8um images to show that the bulk of
    the free-free luminosity is associated with bubbles having radii
    r∼5-100pc, with a mean of ∼20pc. These bubbles are leaky, so that
    ionizing photons emitted inside the bubble escape and excite free-free
    emission beyond the bubble walls, producing WMAP sources that are
    larger than the 8um bubbles. We suggest that the WMAP sources are the
    counterparts of the extended low density HII regions described by
    Mezger (1978A&A....70..565M). The 18 most luminous WMAP sources emit
    half the total Galactic ionizing flux.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        79      183   Identified H II regions


See also:
   II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)
   V/114  : MSX6C Infrared Point Source Catalog (Egan+ 2003)
   J/A+A/537/A1   : Infrared fluxes of HII regions and PNe (Anderson+, 2012)
   J/ApJS/180/283 : WMAP five-year source catalog (Wright+, 2009)
   J/ApJ/691/1560 : Dense core survey in the Orion B cloud (Ikeda+, 2009)
   J/ApJ/670/428  : Bubbles in the galactic disk. II. (Churchwell+, 2007)
   J/ApJ/649/759  : Bubbles in the galactic disk (Churchwell+, 2006)
   J/A+A/397/133  : Star-forming complexes in the Galaxy (Russeil+, 2003)
   J/AJ/126/1423  : MSX 8.3um fluxes of star-forming regions (Kraemer+, 2003)
   J/A+AS/25/25   : HII regions of the Northern Milky Way (Dubout-Crillon+ 1976)


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

   Bytes Format Units     Label     Explanations

   1-  5  F5.1  deg       GLON      Galactic Longitude
   7- 11  F5.1  deg       GLAT      Galactic Latitude
  13- 16  F4.1  deg       a         Semi-major Axis
  18- 20  F3.1  deg       b         Semi-minor Axis
  22- 25  I4    Jy        Flux      Integrated Free-Free Flux
  27- 30  F4.1  kpc       Dist      Distance to Source
  32- 34  I3    ---       [R2003]   [1,480]? Source number from Russeil (2003,
                                    Cat. J/A+A/397/133)
  36- 37  I2    ---       r_Dist    ? Other reference for Dist (1)
  39- 46  E8.2  10-7W/Hz  Lum       Free-Free Luminosity; in erg/s/Hz
  48- 79  A32   ---       Reg       ? Associated Region

Note (1): References to distances are from Table 3 in Russeil, D. (2003,
          Cat. J/A+A/397/133; <[R2003] NNN> in Simbad), except for distance
          with reference as follows:
   1 = Draine, B.T. 1986ApJ...310..408D;
   2 = Rodney, S.A., & Reipurth, B. 2008hsf2.book..683R;
   3 = Fich, M., & Blitz, L. 1984ApJ...279..125F;
   4 = Hanson, M.M. 2003ApJ...597..957H;
   5 = Foster, T., & Routledge, D. 2001A&A...367..635F;
   6 = unknown source;
   7 = Jorgensen, J.K., et al. 2006ApJ...645.1246J;
   8 = Ikeda, N. et al., 2009, Cat. J/ApJ/691/1560;
   9 = unknown source;
  10 = Combi, J.A., et al. 1995A&A...296..514C
  11 = Combi, J.A., et al. 1995A&A...296..514C


History:
    From electronic version of the journal
(End)                 Greg Schwarz [AAS], Emmanuelle Perret [CDS]    01-Mar-2012