Access to Astronomical Catalogues

J/A+A/403/1095   6.7GHz methanol masers survey of low-mass YSO   (Minier+, 2003)
The protostellar mass limit for 6.7 GHz methanol masers.
I. A low-mass YSO survey.
   Minier V., Ellingsen S.P., Norris R.P., Booth R.S.
  <Astron. Astrophys. 403, 1095 (2003)>
  =2003A&A...403.1095M
ADC_Keywords: Masers ; Radio sources

Keywords: masers - stars: formation - stars: circumstellar matter


Abstract:
    We report the results of a search for 6.7-GHz methanol masers toward
    low-mass young stellar objects (YSOs) and (pre)protostellar
    condensations with the Australia Telescope Compact Array (ATCA). Our
    sample consisted of 13 class 0 protostars and 44 class I YSOs as well
    as 66 (pre)protostellar condensations. A single detection was obtained
    toward NGC 2024: FIR4 in the Orion B region. This is the first
    detection of a 6.7-GHz methanol maser in Orion. The nature of FIR4 has
    been a subject of debate with some evidence suggesting that it is a
    very cold high-mass (pre)protostellar condensation and others arguing
    that it is a low-mass YSO. The discovery of a methanol maser
    associated with this source is inconsistent with both of these
    hypotheses and we suggest that FIR4 probably harbours an intermediate-
    or high-mass YSO.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       145      175   Source list


See also:
    J/A+AS/134/115 : Medicina 6.7GHz methanol masers survey (Slysh+ 1999)
    J/A+AS/143/269 : 6.7GHz methanol maser emission survey (Szymczak+, 2000)
    J/AZh/72/22    : A 95 GHz Survey of Methanol Masers (Valtts+, 1995)


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

   Bytes Format Units   Label     Explanations

   1-  2  I2    h       RAh       Field of view Right ascension (J2000)
   4-  5  I2    min     RAm       Field of view Right ascension (J2000)
   7- 13  F7.4  s       RAs       Field of view Right ascension (J2000)
      15  A1    ---     DE-       Field of view Declination sign (J2000)
  16- 17  I2    deg     DEd       Field of view Declination (J2000)
  19- 20  I2    arcmin  DEm       Field of view Declination (J2000)
  22- 27  F6.3  arcsec  DEs       Field of view Declination (J2000)
  29- 66  A38   ---     Region    Region name
  68- 84  A17   ---     Source    Source name
      86  A1    ---     l_Flux    Limit flag on Flux
  87- 91  F5.3  Jy      Flux      ? Flux at 6.7GHz (1)
      92  A1    ---     n_Flux    [*] *: Measured in the channel map
  94-103  A10   ---     Class     Class (2)
 105-137  A33   ----    Assoc     Associations
 139-145  A7    ----    Ref       References  (3)

Note (1): Measured as the maximum intensity in the data cube;
          values below 400mJy are considered as null detection
Note (2): Class 0, I, II are YSO classes;
     COND. stands for "Protostellar Condensation'.
Note (3): References as follows:
      1 = Claussen et al., 1996ApJS..106..111C
      2 = Carkner et al., 1998AJ....116.1933C
      3 = Chini et al., 1997ApJ...474L.135C
      4 = Rodriguez & Reipurt, 1996RMxAA..32...27R
      5 = Gregersen et al., 1997ApJ...484..256G
      6 = Chandler & Carlstrom, 1996ApJ...466..338C
      7 = Mezger et al., 1992A&A...256..631M
      8 = Bontemps et al., 1995A&A...297...98B
      9 = Brandl et al., 1999A&A...352L..69B
     10 = Chen et al., 1997ApJ...478..295C
     11 = Andre et al., 1994ApJ...420..837A
     12 = Bouvier & Appenzeller, 1992A&AS...92..481B
     13 = Motte et al., 1998A&A...336..150M


History:
    From electronic version of the journal
    Lynds 1830 is a misprint for Lynds 1630, corrected in table1
(End)                         James Marcout, Patricia Bauer [CDS]    31-Jul-2003