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J/ApJ/698/2031       Polarimetry of HAeBe stars               (Rodrigues+, 2009)

The alignment of the polarization of Herbig Ae/Be stars with the interstellar magnetic field. Rodrigues C.V., Sartori M.J., Gregorio-Hetem J., Magalhaes A.M. <Astrophys. J., 698, 2031-2035 (2009)> =2009ApJ...698.2031R
ADC_Keywords: Polarization ; Stars, Be ; Interstellar medium ; YSOs Keywords: stars: pre-main sequence - ISM: magnetic fields - polarization Abstract: We present a study of the correlation between the direction of the symmetry axis of the circumstellar material around intermediate mass young stellar objects and that of the interstellar magnetic field. We use CCD polarimetric data on 100 Herbig Ae/Be stars. A large number of them show intrinsic polarization, which indicates that their circumstellar envelopes are not spherical. The interstellar magnetic field direction is estimated from the polarization of field stars. There is an alignment between the position angle of the Herbig Ae/Be star polarization and that of the field stars for the most polarized objects. This may be an evidence that the ambient interstellar magnetic field plays a role in shaping the circumstellar material around young stars of intermediate mass and/or in defining their angular momentum axis. Description: We obtained polarimetric data on 102 fields containing probable HAeBe stars selected from The et al. (1994, Cat. J/A+AS/104/315), Torres (1999, C. A. O., Special Publ. 10 (Rio de Janeiro Observatorio Nacional)), and Vieira et al. (2003, Cat. J/AJ/126/2971). The observations were done with the 0.60m Boller & Chivens telescope at the Observatorio do Pico dos Dias, Brazil, operated by the Laboratorio Nacional de Astrofisica, Brazil from 1998 to 2002. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 102 104 Polarimetry of HAeBe objects
See also: J/ApJ/653/657 : Spectroscopic observations of Herbig Ae/Be stars (Manoj+, 2006) J/AJ/129/856 : Herbig Ae/Be stars in nearby OB associations (Hernandez+, 2005) J/AJ/126/2971 : UBVRI photometry of 131 Herbig Ae/Be (Vieira+, 2003) J/A+AS/136/429 : Herbig Ae/Be stars candidates (Corporon+ 1999) J/AJ/118/1043 : Herbig Ae/Be stars catalog (Herbst+, 1999) J/AZh/73/194 : Circumstellar Disks of Ae/Be Herbig Stars (Grinin+ 1996) J/A+AS/111/399 : Polarization variability in Herbig Ae/Be stars (Jain+, 1995) J/A+AS/104/315 : Member of Herbig Ae/Be stellar group (The+ 1994) J/AJ/106/656 : Herbig Ae/Be stars (Brooke+, 1993) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Object name (see Ref and Note (2)) 15 A1 --- f_Name Note about object (1) 17- 20 F4.1 mag Vmag Torres 1999/Simbad V band magnitude or B band magnitude if flagged 22 A1 --- f_Vmag [B] B: means B-band magnitude 24- 26 I3 s Texp Exposure time 28- 37 A10 "YYYY/MM/DD" ObsDate UT date of the observation 39- 44 F6.3 % Pol Observed polarization 46- 50 F5.3 % e_Pol Error in ObPol 52- 56 F5.1 deg PolPA Observed polarization position angle 58- 61 I4 --- Nfg Number of foreground objects 63- 67 F5.3 % Pfg ? Foreground polarization 69- 73 F5.3 % e_Pfg ? Error in ForPol 75- 79 F5.1 deg PfgPA ? Foreground polarization position angle 81- 86 F6.3 % Pin ? Intrinsic polarization 88- 92 F5.3 % e_Pin ? Error in InPol 94- 98 F5.1 deg PinPA ? Intrinsic polarization position angle 100-102 A3 --- Ref References (2)
Note (1): Flag as follows: 3 = The images of the field containing HD23302 and HD23480 do not include objects with signal high enough to estimate the foreground polarization. 5 = PDS465 and PDS581 are post-AGB objects. Note (2): References as follows: 1 = Vieira et al. (2003, Cat. J/AJ/126/2971; <PDS NNN> in Simbad); 2 = The et al. (1994, Cat. J/A+AS/104/315); 3 = Torres (1999, C. A. O., Special Publ. 10 (Rio de Janeiro Observatorio Nacional)).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Jun-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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