J/ApJ/826/16 ALMA and GeMS observations of the OMC1 region (Eisner+, 2016)
Protoplanetary disks in the Orion OMC1 region imaged with ALMA.
Eisner J.A., Bally J.M., Ginsburg A., Sheehan P.D.
<Astrophys. J., 826, 16-16 (2016)>
=2016ApJ...826...16E 2016ApJ...826...16E (SIMBAD/NED BibCode)
ADC_Keywords: Millimetric/submm sources ; Photometry, infrared ; Stars, masses ;
YSOs
Keywords: open clusters and associations: individual: Orion;
planetary systems; stars: pre-main sequence
Abstract:
We present ALMA observations of the Orion Nebula that cover the OMC1
outflow region. Our focus in this paper is on compact emission from
protoplanetary disks. We mosaicked a field containing ∼600
near-IR-identified young stars, around which we can search for
sub-millimeter emission tracing dusty disks. Approximately 100 sources
are known proplyds identified with the Hubble Space Telescope. We
detect continuum emission at 1mm wavelengths toward ∼20% of the
proplyd sample, and ∼8% of the larger sample of near-IR objects. The
noise in our maps allows 4σ detection of objects brighter than
∼1.5mJy, corresponding to protoplanetary disk masses larger than
1.5MJ (using standard assumptions about dust opacities and
gas-to-dust ratios). None of these disks are detected in
contemporaneous CO(2-1) or C18O(2-1) observations, suggesting that
the gas-to-dust ratios may be substantially smaller than the canonical
value of 100. Furthermore, since dust grains may already be
sequestered in large bodies in Orion Nebula cluster (ONC) disks, the
inferred masses of disk solids may be underestimated. Our results
suggest that the distribution of disk masses in this region is
compatible with the detection rate of massive planets around M dwarfs,
which are the dominant stellar constituent in the ONC.
Description:
We mapped a region around the OMC1 BN/KL outflow in the ONC with ALMA.
The map is comprised of 108 mosaicked pointings in the northwest
region of the OMC1 outflow and 39 pointings in the southeast region.
The fields were observed at 230GHz frequency (Band 6), corresponding
to a wavelength of 1.3mm. Observations were taken between 2014 July 19
and 2015 April 05. The angular resolution of the observations was
approximately 1".
We observed the OMC1 region in Orion with GeMS at the Gemini South
telescope between 2012 December 30 and 2013 February 28 (see Bally et
al. 2015, J/A+A/579/A130). We observed in the Ks filter, as well as
the narrow Fe[II] and H2 filters, producing images with angular
resolutions of ∼0.06".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 35 40 New near-IR sources detected in GeMS imaging
table2.dat 61 49 Fluxes and inferred disk masses
for ALMA-detected sources
table3.dat 47 313 Fluxes observed toward non-detected source positions
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See also:
J/ApJ/814/130 : Planet occurrence rates calculated for KOIs (Mulders+, 2015)
J/A+A/579/A130 : Near-IR BN/KL outflow images (Bally+, 2015)
J/ApJ/802/77 : Protoplanetary disk masses in NGC 2024 cluster (Mann+, 2015)
J/ApJ/782/8 : Spectroscopy of 104 objects in the ONC (Ingraham+, 2014)
J/MNRAS/435/1671 : SCUBA-2 850um survey in σOri cluster (Williams+, 2013)
J/AJ/146/85 : Spectral types of optical stars in ONC (Hillenbrand+, 2013)
J/ApJ/771/129 : Submillimetric Class II sources of Taurus (Andrews+, 2013)
J/PASP/123/412 : Exoplanet Orbit Database (Wright+, 2011)
J/ApJ/697/1103 : Kinematics of Orion Nebula Cluster (Tobin+, 2009)
J/AJ/136/2136 : HST/ACS Atlas of Great Orion Nebula proplyds (Ricci+, 2008)
J/ApJ/671/1800 : SCUBA observations of ρ Oph cloud (Andrews+, 2007)
J/A+A/441/195 : Circumstellar disks in Trapezium cluster (Vicente+, 2005)
J/ApJ/540/1016 : K-band+NICMOS photometry of Trapezium Cluster (Luhman+, 2000)
J/ApJ/540/236 : KH photometry of Orion Nebula Cluster (Hillenbrand+, 2000)
J/AJ/116/1816 : JHKLMNOPQ photometry in Orion cluster (Hillenbrand+, 1998)
J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [GeMS]
6- 7 I2 --- Seq GeMS identifier
9 I1 h RAh [5] Hour of Right Ascension (J2000)
11- 12 I2 min RAm [35] Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs [10/16] Second of Right Ascension (J2000)
20 A1 --- DE- [-] Sign of Declination (J2000)
21 I1 deg DEd [5] Degree of Declination (J2000)
23- 24 I2 arcmin DEm [20/22] Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Arcsecond of Declination (J2000)
32- 35 F4.1 mag Ksmag [7.2/14.4] Observed GeMS Ks band magnitude
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- ID Identifier
9 I1 h RAh [5] Hour of Right Ascension (J2000)
11- 12 I2 min RAm [35] Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs [8.9/20.2] Second of Right Ascension (J2000)
20 A1 --- DE- [-] Sign of the Declination (J2000)
21 I1 deg DEd [5] Degree of Declination (J2000)
23- 24 I2 arcmin DEm [20/23] Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Arcsecond of Declination (J2000)
32- 34 F3.1 Msun M* [0.1/5]? Stellar mass (1)
36- 39 F4.1 mJy F1.3mm [1.3/26] Flux density at 1.3mm
41- 43 F3.1 mJy e_F1.3mm [0.2/7] Uncertainty in F1.3mm
45- 48 F4.1 mJy Fdust [0/26] Dust flux density
50- 52 F3.1 mJy e_Fdust [0.2/7] Uncertainty in Fdust
54- 57 F4.1 Mjup Mdisk [0/32] Disk mass in Jupiter masses
59- 61 F3.1 Mjup e_Mdisk [0/9] Uncertainty in Mdisk
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Note (1): Stellar masses, where available, are taken from the literature
(Hillenbrand 1997, J/AJ/113/1733 (<[H97b] NNNNa> in Simbad);
Luhman et al. 2000, J/ApJ/540/1016 (<[LRY2000] NNN> in Simbad);
Slesnick et al. (2004ApJ...610.1045S 2004ApJ...610.1045S);
Hillenbrand et al. 2013, J/AJ/146/85; Ingraham et al. 2014, J/ApJ/782/8).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- ID Identifier
9 I1 h RAh [5] Hour of Right Ascension (J2000)
11- 12 I2 min RAm [35] Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs [8/20.4] Second of Right Ascension (J2000)
20 A1 --- DE- [-] Sign of the Declination (J2000)
21 I1 deg DEd [5] Degree of Declination (J2000)
23- 24 I2 arcmin DEm [20/23] Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Arcsecond of Declination (J2000)
32- 36 F5.1 mJy F1.3mm [-30/252.2] Flux density at 1.3mm
38- 42 F5.1 mJy Noise [0.1/180] Local noise
44- 47 F4.1 --- S/N [-2/4] Signal-to-Noise
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Sep-2016