J/A+A/426/171 H_2_ flows in rho Ophiuchi A (Khanzadyan+, 2004) ================================================================================ An unbiased search for the signatures of protostars in the rho Ophiuchi A Molecular Cloud. I. Near-infrared observations. Khanzadyan T., Gredel R., Smith M.D., Stanke T. =2004A&A...426..171K ================================================================================ ADC_Keywords: Interstellar medium ; Molecular clouds Keywords: ISM - stars: formation - ISM: jets and outflows - ISM: clouds - ISM: individual: Rho Oph A Abstract: We present an unbiased search for molecular hydrogen emission in the L1688 cloud within the rho Ophiuchi molecular cloud complex. Our near-infrared survey covers a connected region of extent 35'x35'. We detect several new H_2_ flows but the total number of detected outflows is low and is consistent with the paucity of Class 0 and Class 1 sources in the molecular cloud. From the spatial distribution, their collimation and the individual shapes of the bow shocks, we suggest possible candidates for the outflow sources. Most of the candidate driving sources are deeply embedded in dense cores of the molecular cloud. A very young outflow arises from the newly discovered Class 0 source MMS 126. Two major outflows in the NE-SW direction arise from the YLW 15 and YLW 16 Class I sources. Three additional outflows, which both extend over several arcminutes, arise from the Class I sources YLW 31 and YLW 52. Flow directions are generally NE-SW, perpendicular to the elongation directions of the cloud filaments. The apparent extents of molecular flows are related to either the widths of cloud filaments or to the separation between filaments. The estimated jet power needed to continuously drive and excite the detected portions of the shocked H_2_ outflows lies in the range 0.02-0.2L_{sun}_. Given the critical dependence on the environment, however, the total sizes and powers of the outflows may be considerably larger. Description: Table summarises the details of the H_2_ objects found in our survey. The second and third columns list the coordinates of each knot, the fourth and fifth column list the fluxes in units of 10^-18^W/m^2^ and the corresponding aperture. In several cases, elliptical apertures have been used to derive fluxes. Column 6 cross-identifies our objects with previous detections. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 16 26 26.4 -24 22 33 rho Oph A ---------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 76 74 Details of H_2_ 1-0 S(1) line excited objects in our survey -------------------------------------------------------------------------------- See also: J/A+A/372/173 : ISOCAM observations of the rho Ophiuchi cloud (Bontemps+, 2001) J/A+A/359/113 : X-ray and IR study of Rho Oph dark cloud (Grosso+, 2000) Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 A7 --- [KGS2004] Knot Name (1) 9- 10 I2 h RAh Right ascension (J2000.0) 12- 13 I2 min RAm Right ascension (J2000.0) 15- 18 F4.1 s RAs Right ascension (J2000.0) 20 A1 --- DE- Declination sign (J2000.0) 21- 22 I2 deg DEd Declination (J2000.0) 24- 25 I2 arcmin DEm Declination (J2000.0) 27- 30 F4.1 arcsec DEs Declination (J2000.0) 32- 35 F4.1 10-18W/m2 Flux Flux in H_2_ 1-0 S(1) line (narrow band filter, centered at 2.124um with width 0.028um) 37- 40 F4.1 arcsec Apert1 ? Aperture (2) 42 A1 --- --- [x] 44- 47 F4.1 arcsec Apert2 ? Aperture (2) 49- 76 A28 --- Names Other names (3) -------------------------------------------------------------------------------- Note (1): We prefix all knots according to their placement in the corresponding survey field. In each field, objects are identified according to increasing right ascension. For example, object f10-01 is situated in Field10 and located to the West of object f10-02. In cases where individual objects split up into a number of associated emission knots, we use labels a, b, c, etc. [KGS2004] fNN-NNa in Simbad Note (2): Diameter of aperture when circular, semimajor axis when elliptical. Note (3): [K2003] object are from Khanzadyan 2003, Ph. D. Thesis ([K2003d] in Simbad) [GSWC2003] are from Gomez et al. 2003 (2003AJ....126..863G); [DMW95] are from Dent et al. 1995 (1995MNRAS.277..193D); -------------------------------------------------------------------------------- Acknowledgements: Tigran Khanzadyan ================================================================================ (End) Tigran Khanzadyan [MPIA, Germany], Patricia Vannier [CDS] 13-Jul-2004