J/ApJ/822/93 The population of compact radio sources in ONC (Forbrich+, 2016)
The population of compact radio sources in the Orion Nebula Cluster.
Forbrich J., Rivilla V.M., Menten K.M., Reid M.J., Chandler C.J., Rau U.,
Bhatnagar S., Wolk S.J., Meingast S.
<Astrophys. J., 822, 93-93 (2016)>
=2016ApJ...822...93F 2016ApJ...822...93F (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; Cross identifications ; X-ray sources ;
Infrared sources
Keywords: radio continuum: stars; stars: coronae; stars: formation;
X-rays: stars
Abstract:
We present a deep centimeter-wavelength catalog of the Orion Nebula
Cluster (ONC), based on a 30hr single-pointing observation with the
Karl G. Jansky Very Large Array in its high-resolution A-configuration
using two 1GHz bands centered at 4.7 and 7.3GHz. A total of 556
compact sources were detected in a map with a nominal rms noise of
3µJy/bm, limited by complex source structure and the primary beam
response. Compared to previous catalogs, our detections increase the
sample of known compact radio sources in the ONC by more than a factor
of seven. The new data show complex emission on a wide range of
spatial scales. Following a preliminary correction for the wideband
primary-beam response, we determine radio spectral indices for 170
sources whose index uncertainties are less than ±0.5. We compare the
radio to the X-ray and near-infrared point-source populations, noting
similarities and differences.
Description:
The observations were carried out with the Karl G. Jansky VLA of the
National Radio Astronomy Observatory on 2012 September 30, October 2-5
under project code SD630. Data were taken using the VLA's C-band
(4-8GHz) receivers in full polarization mode, with two 1GHz basebands
centered at 4.736 and 7.336GHz to provide a good baseline for source
spectral index determination.
Apart from the first epoch, the field was simultaneously observed with
the Chandra X-Ray Observatory. Mostly of interest for variability
information, these data will be presented as part of a follow-up
paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 122 556 Orion Nebula Cluster radio compact source catalog
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See also:
J/ApJ/802/60 : Structure of young stellar clusters. II. (Kuhn+, 2015)
J/ApJ/790/49 : Gould's Belt VLA survey. III. Orion region (Kounkel+, 2014)
J/ApJ/787/107 : Spatial structure of young stellar clusters. I. (Kuhn+, 2014)
J/ApJ/782/8 : Spectroscopy of 104 objects in the ONC (Ingraham+, 2014)
J/ApJS/209/32 : Probable young stars in the MYStIX project (Broos+, 2013)
J/ApJS/208/28 : Hα survey in the ONC (Szegedi-Elek+, 2013)
J/ApJS/207/10 : HST Treasury Program on the ONC (Robberto+, 2013)
J/ApJ/722/1092 : Optical photometry of the ONC. II. (Da Rio+, 2010)
J/AJ/139/950 : JHKs photometry in ONC (Robberto+, 2010)
J/AJ/136/2136 : HST/ACS Atlas of Great Orion Nebula proplyds (Ricci+, 2008)
J/AJ/136/621 : Near-infrared polarimetry of M42 (Kusakabe+, 2008)
J/ApJS/175/277 : Submillimeter-Continuum SCUBA detections (Di Francesco+, 2008)
J/ApJ/677/401 : Xray properties of protostars in ONC (Prisinzano+, 2008)
J/ApJ/671/605 : NGC 2264 and ONC PMS stars in the infrared (Cieza+, 2007)
J/ApJ/660/704 : Optical and X-ray variability of ONC PMS (Stassun+, 2007)
J/ApJS/160/511 : Orion Nebula Cluster proplyd candidates (Kastner+, 2005)
J/ApJS/160/450 : X-ray emission in Orion Nebula young stars (Flaccomio+, 2005)
J/ApJS/160/353 : Membership of the Orion nebula population (Getman+, 2005)
J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)
J/ApJ/540/236 : KH photometry of Orion Nebula Cluster (Hillenbrand+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Running sequence number
5- 8 F4.2 arcmin Rad [0.01/7] Distance from phase center
10- 11 I2 h RAh [5] Hour of Right Ascension (J2000)
13- 14 I2 min RAm [34/35] Minute of Right Ascension (J2000)
16- 23 F8.5 s RAs Second of Right Ascension (J2000)
25- 33 F9.7 s e_RAs [0/0.007] Positional Uncertainty in RA (J2000)
35- 35 A1 --- DE- [-] Sign of the Declination (J2000)
36- 37 I2 deg DEd [5] Degree of Declination (J2000)
39- 40 I2 arcmin DEm [17/27] Arcminute of Declination (J2000)
42- 48 F7.4 arcsec DEs Arcsecond of Declination (J2000)
50- 57 F8.6 arcsec e_DEs [0/0.2] Positional Uncertainty in DE (J2000)
59- 65 F7.4 mJy Spk [0.01/23.3] Peak flux density, corrected for
primary beam attenuation
67- 72 F6.4 mJy e_Spk [0.001/0.03] Uncertainty in Spk
74- 78 F5.2 --- alpha [-1.4/1.9]? Radio spectral index, if
associated error ≤±0.5
80- 83 F4.2 --- e_alpha [0/0.5]? Uncertainty in alpha
85- 94 A10 --- Ref Previous radio identification, within 0.5" (1)
96- 99 I4 --- COUP [107/1550]? COUP source number, within 0.5"
Getman+ 2005, J/ApJS/160/319
101-105 F5.2 [10-7W] Ltc [27.8/33.3]? Logarithm of the total,
absorption-corrected X-ray (0.5-8.0keV)
luminosity, COUP, Getman+ 2005, J/ApJS/160/319
107-122 A16 --- VISION VISION near-infrared source ID, within 0.5",
from Meingast+ (2016A&A...587A.153M 2016A&A...587A.153M)
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Note (1): Previous radio designations as follows:
Z = Zapata et al. (2004AJ....127.2252Z 2004AJ....127.2252Z; <[ZRK2004] NN> in Simbad);
K = Kounkel et al. (2014, J/ApJ/790/49;
<GBS-VLA JHHMMSS.ss+DDMMSS.s> in Simbad);
GMR ## = Counterparts from Garay, Moran, Reid (1987ApJ...314..535G 1987ApJ...314..535G;
or in Simbad) and subsequent publications.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 08-Aug-2016