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J/ApJ/834/142 Gould's Belt Distances Survey (GOBELINS). II. OMC (Kounkel+, 2017)

The Gould's Belt Distances Survey (GOBELINS) II. Distances and structure toward the Orion Molecular Clouds. Kounkel M., Hartmann L., Loinard L., Ortiz-Leon G.N., Mioduszewski A.J., Rodriguez L.F., Dzib S.A., Torres R.M., Pech G., Galli P.A.B., Rivera J.L., Boden A.F., Evans II N.J., Briceno C., Tobin J.J. <Astrophys. J., 834, 142-142 (2017)> =2017ApJ...834..142K (SIMBAD/NED BibCode)
ADC_Keywords: Molecular clouds ; Radio sources ; Parallaxes, trigonometric ; Stars, distances ; Proper motions Keywords: astrometry; ISM: individual objects: Orion Molecular Clouds; parallaxes; radiation mechanisms: nonthermal; stars: kinematics and dynamics Abstract: We present the results of the Gould's Belt Distances Survey of young star-forming regions toward the Orion Molecular Cloud Complex. We detected 36 young stellar objects (YSOs) with the Very Large Baseline Array, 27 of which have been observed in at least three epochs over the course of two years. At least half of these YSOs belong to multiple systems. We obtained parallax and proper motions toward these stars to study the structure and kinematics of the Complex. We measured a distance of 388±5pc toward the Orion Nebula Cluster, 428±10pc toward the southern portion L1641, 388±10pc toward NGC 2068, and roughly ∼420pc toward NGC 2024. Finally, we observed a strong degree of plasma radio scattering toward λ Ori. Description: The observations presented in this paper were made with the National Radio Astronomy Observatory's Very Long Baseline Array (VLBA) at 5GHz with a 256MHz bandwidth (spanning the range of 4.852-5.076GHz). They span a period of two years from 2014 to 2016 March. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 77 355 Positions of sources identified in at least two epochs or with a single >5σ detection table5.dat 92 26 Distance and proper motion solutions
See also: J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997) J/A+A/337/183 : V1046 Ori uvby photometry and radial velocities (Bolton+ 1998) J/AJ/123/387 : VRI photom. of λ Ori star-forming region (Dolan+, 2002) J/A+A/458/461 : Binary stars in the Orion Nebula Cluster (Koehler+, 2006) J/other/A+ARV/17.251 : Stars observed with Doppler imaging (Strassmeier, 2009) J/ApJ/722/1092 : Optical photometry of the ONC. II. (Da Rio+, 2010) J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010) J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSO catalog (Megeath+, 2012) J/ApJ/753/149 : YSOVAR: 6 eclipsing binaries in Orion (Morales-Calderon+, 2012) J/ApJ/764/114 : BVRI photometry of stars in Orion A (Hsu+, 2013) J/A+A/564/A29 : Optical and near-infrared photometry in Orion A (Bouy+, 2014) J/ApJ/790/49 : Gould's Belt VLA survey. III. Orion region (Kounkel+, 2014) J/ApJ/786/29 : Catalog of distances to molecular clouds (Schlafly+, 2014) J/ApJ/818/59 : IN-SYNC. IV. YSOs in Orion A (Da Rio+, 2016) J/ApJ/821/8 : Spectrosc. binary population of ONC & NGC2264 (Kounkel+, 2016) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- VLBA [1/165] VLBA index number 5 A1 --- YSO? [ny-] A YSO source? (- = unconfirmed) 7 I1 h RAh Hour of Right Ascension (J2000) 9- 10 I2 min RAm Minute of Right Ascension (J2000) 12- 20 F9.6 s RAs Second of Right Ascension (J2000) 22- 26 F5.3 mas e_RAs [0/1] Uncertainty in RAS 28 A1 --- DE- Sign of the Declination (J2000) 29- 30 I2 deg DEd Degree of Declination (J2000) 32- 33 I2 arcmin DEm Arcminute of Declination (J2000) 35- 43 F9.6 arcsec DEs Arcsecond of Declination (J2000) 45- 49 F5.3 mas e_DEs [0.002/1.3] Uncertainty in DEs 51- 57 I7 d JD Julian Date of the observation 59- 65 F7.3 mJy Flux [0.09/337.7] VLBA flux density at 5GHz 67- 71 F5.3 mJy e_Flux [0.03/1.8] Uncertainty in Flux 73- 77 F5.3 mJy rms [0.004/0.8] Field rms
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 3 I3 --- VLBA [4/148] VLBA index number 4 A1 --- --- [/] 5- 7 I3 --- VLBA2 ? 2nd VLBA number 9- 11 A3 --- f_VLBA Flag(s) on VLBA (1) 13- 28 A16 --- Name Common name 30- 36 A7 --- SpT MK spectral type 38- 40 A3 --- r_SpT Reference for SpT (2) 42- 50 A9 --- Reg Region 52- 56 F5.3 mas Plx [1.8/3.4] Parallax 58- 62 F5.3 mas e_Plx [0.02/0.6] Plx uncertainty 64- 66 I3 pc Dist [302/536] Distance 68- 70 I3 pc e_Dist [4/113] Dist uncertainty 72- 76 F5.2 mas/yr pmRA [-7.3/4.9] Proper motion along RA 78- 81 F4.2 mas/yr e_pmRA [0.03/0.7] pmRA uncertainty 83- 87 F5.2 mas/yr pmDE [-3.8/7] Proper motion along DEC 89- 92 F4.2 mas/yr e_pmDE [0.07/1.4] pmDE uncertainty
Note (1): Flag as follows: a = Spectroscopic binary. b = Detected only in three epochs. Uncertainties could be underestimated. c = Astrometric binary. d = Probable binary. Note (2): Reference as follows: H97 = Hillenbrand (1997, J/AJ/113/1733), M12 = Morales-Calderon et al. (2012, J/ApJ/753/149), S09 = Strassmeier (2009, J/other/A+ARV/17.251), M88 = Marschall & Mathieu (1988AJ.....96.1956M), H99 = Houk & Swift (1999MSS...C05....0H) H13 = Hsu et al. (2013, J/ApJ/764/114), A00 = Alcala et al. (2000A&A...353..186A), S75 = Strom et al. (1975ApJ...196..489S).
History: From electronic version of the journal References: Ortiz-Leon et al. Paper I. 2017ApJ...834..141O Ortiz-Leon et al. Paper II. 2017ApJ...834..142O This catalog Ortiz-Leon et al. Paper III. 2017ApJ...834..143O
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 07-Jul-2017
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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