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J/ApJ/831/155 VLA survey for faint compact radio sources in ONC (Sheehan+, 2016)

A VLA survey for faint compact radio sources in the Orion Nebula Cluster. Sheehan P.D., Eisner J.A., Mann R.K., Williams J.P. <Astrophys. J., 831, 155-155 (2016)> =2016ApJ...831..155S (SIMBAD/NED BibCode)
ADC_Keywords: Radio continuum ; Radio sources ; YSOs ; Cross identifications Keywords: protoplanetary disks; radio continuum: stars; stars: formation Abstract: We present Karl G. Jansky Very Large Array 1.3, 3.6, and 6cm continuum maps of compact radio sources in the Orion Nebular Cluster (ONC). We mosaicked 34arcmin2 at 1.3cm, 70arcmin2 at 3.6cm and 109arcmin2 at 6cm, containing 778 near-infrared detected young stellar objects and 190 Hubble Space Telescope-identified proplyds (with significant overlap between those characterizations). We detected radio emission from 175 compact radio sources in the ONC, including 26 sources that were detected for the first time at these wavelengths. For each detected source, we fitted a simple free-free and dust emission model to characterize the radio emission. We extrapolate the free-free emission spectrum model for each source to ALMA bands to illustrate how these measurements could be used to correctly measure protoplanetary disk dust masses from submillimeter flux measurements. Finally, we compare the fluxes measured in this survey with previously measured fluxes for our targets, as well as four separate epochs of 1.3cm data, to search for and quantify the variability of our sources. Description: We imaged the Orion Nebular Cluster (ONC) in 1.3, 3.6, and 6cm wavelength continuum emission with the Karl G. Jansky Very Large Array (JVLA) between 2013 November and 2014 May. The field of view of the JVLA antenna primary beam at 6cm, FWHM of 9', encompasses all 778 YSOs from Hillenbrand & Carpenter (2000, J/ApJ/540/236), and all of the 196 HST-detected proplyds (Ricci+ 2008, J/AJ/136/2136). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 151 909 Source detections, identifications, and fluxes table3.dat 107 175 Free-free emission model parameters and ALMA band fluxes for detected sources table4.dat 31 147 Variability of ONC sources
See also: J/ApJ/790/49 : Gould's Belt VLA survey. III. Orion region (Kounkel+, 2014) J/ApJS/207/10 : HST Treasury Program on the ONC (Robberto+, 2013) J/A+A/502/883 : I photom. of very low mass ONC stars (Rodriguez-Ledesma+, 2009) J/AJ/136/2136 : HST/ACS Atlas of Great Orion Nebula proplyds (Ricci+, 2008) J/AJ/130/1763 : 11.7µm point sources in Orion (Smith+, 2005) J/AJ/123/2402 : The microJansky sky at 8.4GHz (Fomalont+, 2002) J/ApJ/540/236 : KH photometry of Orion Nebula Cluster (Hillenbrand+, 2000) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Running sequence number 5- 12 A8 --- [RRS2008] Proplyd name (from Ricci+, 2008, J/AJ/136/2136) 14- 16 I3 --- [HC2000] ? Hillenbrand & Carpenter 2000, J/ApJ/540/236 identifier 18- 19 A2 --- GMR Garay+ 1987ApJ...314..535G identifier 21- 22 I2 --- [ZRK2004] ? Zapata+ 2004AJ....127.2252Z identifier 24- 30 A7 --- OName Other Names 32 I1 h RAh [5] Hour of Right Ascension (J2000) 34- 35 I2 min RAm [34/35] Minute of Right Ascension (J2000) 37- 41 F5.2 s RAs Second of Right Ascension (J2000) 43 A1 --- DE- [-] Sign of the Declination (J2000) 44 I1 deg DEd [5] Degree of Declination (J2000) 46- 47 I2 arcmin DEm [18/28] Arcminute of Declination (J2000) 49- 53 F5.2 arcsec DEs Arcsecond of Declination (J2000) 55- 60 F6.3 mJy F6 [-0.4/36] The 6cm flux density 62- 66 F5.3 mJy e_F6 [0.04/4] Uncertainty in F6 68- 73 F6.3 mJy F3.6 [-1/37]? The 3.6cm flux density 75- 79 F5.3 mJy e_F3.6 [0.03/4]? Uncertainty in F3.6 81- 86 F6.3 mJy F1.3a [-1.5/29]? Nov. 10, 2013 1.3cm flux density 88- 93 F6.3 mJy e_F1.3a [0.03/38]? Uncertainty in F1.3,1 95-100 F6.3 mJy F1.3b [-1/41]? Mar. 3, 2014 1.3cm flux density 102-107 F6.3 mJy e_F1.3b [0.03/25]? Uncertainty in F1.3,2 109-114 F6.3 mJy F1.3c [-1.2/30]? Mar. 7, 2014 1.3cm flux density 116-121 F6.3 mJy e_F1.3c [0.03/70]? Uncertainty in F1.3,3 123-128 F6.3 mJy F1.3d [-1/23]? May 3, 2014 1.3cm flux density 130-134 F5.3 mJy e_F1.3d [0.03/3]? Uncertainty in F1.3,4 136-141 F6.3 mJy <F1.3> [-0.9/19]? Mean 1.3cm flux density 143-151 F9.3 mJy e_<F1.3> [0.01/10335]? Uncertainty in <F1.3>
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [11/904] Index identifier 5 A1 --- l_nuturn Limit flag on nuturn 6- 12 F7.3 GHz nuturn [5/300]? Frequency where the wind becomes partially optically thick 14- 19 F6.3 GHz e_nuturn [0.9/60]? Uncertainty in νturn [GHz] 21- 26 F6.3 mJy Fturn [0.05/24.5] Flux density at nuturn 28- 32 F5.3 mJy e_Fturn [0.01/1] Uncertainty in Fturn 34- 40 F7.3 mJy Fdust [0/274]? Dust flux density 42- 47 F6.3 mJy e_Fdust [0.06/18]? Uncertainty in Fdust 49- 53 F5.2 mJy S35 [0.05/20.4] Flux density at 35GHz; Band 1 55- 59 F5.2 mJy S80 [0.05/18.7] Flux density at 80GHz; Band 2 61- 65 F5.2 mJy S100 [0.04/18.3] Flux density at 100GHz; Band 3 67- 71 F5.2 mJy S150 [0.04/17.6] Flux density at 150GHz; Band 4 73- 77 F5.2 mJy S200 [0.04/17.1] Flux density at 200GHz; Band 5 79- 83 F5.2 mJy S230 [0.04/16.9] Flux density at 230GHz; Band 6 85- 89 F5.2 mJy S345 [0.04/16.2] Flux density at 345GHz; Band 7 91- 95 F5.2 mJy S450 [0.04/15.8] Flux density at 450GHz; Band 8 97-101 F5.2 mJy S650 [0.04/15.2] Flux density at 650GHz; Band 9 103-107 F5.2 mJy S850 [0.04/14.8] Flux density at 850GHz; Band 10
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [11/897] Index number 5 A1 --- 1.3Var 1.3cm variable? 7- 9 I3 % DelF1.3 [19/905]? ΔF/F at 1.3cm 11- 13 I3 % e_DelF1.3 [3/574]? DelF1.3 uncertainty 15 A1 --- 3.6Var 3.6cm variable? 17- 19 I3 % DelF3.6 [20/215]? ΔF/F at 3.6cm 21- 22 I2 % e_DelF3.6 [3/46]? DelF3.6 uncertainty 24 A1 --- 6Var 6cm variable? 26- 28 I3 % DelF6 [47/102]? ΔF/F at 6cm 30- 31 I2 % e_DelF6 [3/11]? DelF6 uncertainty
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 08-Feb-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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