J/ApJ/884/6 Known members of Orion A with Gaia DR2 data (McBride+, 2019)
Runaway young stars near the Orion Nebula.
McBride A., Kounkel M.
<Astrophys. J., 884, 6 (2019)>
=2019ApJ...884....6M 2019ApJ...884....6M
ADC_Keywords: YSOs; Proper motions; Parallaxes, trigonometric; Radial velocities
Keywords: Young massive clusters ; Pre-main sequence stars ; Stellar dynamics ;
Three-body problem ; Proper motions
Abstract:
The star-forming region of the Orion Nebula (ONC) is ideal to study
the stellar dynamics of young stars in a clustered environment. Using
Gaia DR2 we search for pre-main sequence stars with unusually high
proper motions that may be representative of a dynamical ejection from
unstable young triple systems or other close three-body encounters. We
identify 26 candidate stars that are likely to have had such an
encounter in the last 1Myr. Nine of these stars could be traced back
to the densest central-most region of the ONC, the Trapezium, while
five others have likely interactions with other OB-type stars in the
cluster. Seven stars originate from other nearby populations within
the Orion Complex that coincidentally scattered toward the ONC. A
definitive point of origin cannot be identified for the remaining
sources. These observations shed light on the frequency of the
ejection events in young clusters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 193 5988 Known members of the Orion A from the literature
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)
J/AJ/119/3026 : Circumstellar disk candidates in Orion (Rebull+, 2000)
J/ApJS/160/353 : Membership of the Orion nebula population (Getman+, 2005)
J/AJ/129/363 : Spectroscopy in Orion Nebula Cluster (Sicilia-Aguilar+, 2005)
J/ApJ/646/297 : Spitzer obs. of pre-main-sequence stars (Rebull+, 2006)
J/ApJ/676/1109 : Velocities of stars in ONC (Furesz+, 2008)
J/A+A/504/461 : YSOs in L1630N and L1641 (Fang+, 2009)
J/ApJ/722/1092 : Optical photometry of the ONC. II. (Da Rio+, 2010)
J/ApJ/748/14 : ONC population data from WFI observations (Da Rio+, 2012)
J/ApJ/752/59 : Low-mass population in L1641 (Hsu+, 2012)
J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSO catalog (Megeath+, 2012)
J/ApJS/207/5 : YSOs in LDN 1641 with Hectochelle spectra (Fang+, 2013)
J/ApJ/764/114 : BVRI photometry of stars in Orion A (Hsu+, 2013)
J/ApJ/768/99 : X-ray survey of YSOs in Orion A (Pillitteri+, 2013)
J/ApJ/787/109 : Age estimates for NGC 2024 and ONC stars (Getman+, 2014)
J/ApJ/787/108 : Age estimates for massive SFR stellar pop. (Getman+, 2014)
J/ApJ/787/107 : Spatial structure of young stellar clusters. I. (Kuhn+, 2014)
J/A+A/593/A7 : NH and AV Towards YSOs in the ONC (Hasenberger+, 2016)
J/ApJ/821/8 : Spectroscopic binary pop. of ONC & NGC2264 (Kounkel+, 2016)
J/AJ/153/188 : Spectroscopy of the foreground pop. in Orion A (Fang+, 2017)
J/AJ/154/29 : Obs. of 148 young stars toward NGC 1980 (Kounkel+, 2017)
J/ApJ/834/142 : Gould's Belt Distances Survey. II. OMC (Kounkel+, 2017)
J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)
J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)
J/A+A/620/A172 : Solar neighbourhood young stars 3D mapping (Zari+, 2018)
J/A+A/622/A149 : Vienna survey in Orion. III. (Grossschedl+, 2019)
J/AJ/157/109 : Stellar proper motions in ONC (Kim+, 2019)
J/AJ/158/122 : Local structure & SFH of the MW (Kounkel+, 2019)
J/AJ/157/196 : Close companions around young stars (Kounkel+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 F17.14 deg RAdeg [82.34/86.66] Right Ascension (J2000)
19- 38 F20.16 deg DEdeg [-10.42/-3.41] Declination (J2000)
40- 75 A36 --- Ref Confirmation reference code(s) (1)
77- 95 I19 --- Gaia ? Gaia DR2 (I/345) source identifier
97-103 F7.4 mas plx [-6/30.7]? Gaia DR2 parallax
105-110 F6.4 mas e_plx [0.019/3]? Uncertainty in plx
112-118 F7.3 mas/yr pmRA [-78/360.4]? Gaia DR2 proper motion along RA
120-124 F5.3 mas/yr e_pmRA [0.03/4.1]? Uncertainty in pmRA
126-133 F8.3 mas/yr pmDE [-383/85.9]? Gaia DR2 proper motion along DE
135-139 F5.3 mas/yr e_pmDE [0.03/4.3]? Uncertainty in pmDE
141-151 F11.7 km/s RVel [-51.5/238]? Weighted average radial velocity (2)
153-162 F10.7 km/s e_RVel [0.07/12.7]? Uncertainty in RVel
164 A1 --- Fig Panel in Figure 4 identifier (the 26 high proper
motion sources)
166-193 A28 --- OName Simbad name
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Note (1): Reference code as follows:
1 = Kounkel et al. (2018, J/AJ/156/84);
2 = Grosschedl et al. (2019, J/A+A/622/A149);
3 = Fang et al. (2009, J/A+A/504/461);
4 = Fang et al. (2013, J/ApJS/207/5);
5 = Hsu et al. (2012, J/ApJ/752/59);
6 = Hsu et al. (2013, J/ApJ/764/114);
7 = Kounkel et al. (2016, J/ApJ/821/8);
8 = Hasenberger et al. (2016, J/A+A/593/A7);
9 = Pillitteri et al. (2013ApJ...773...80P 2013ApJ...773...80P);
10 = Fang et al. (2017, J/AJ/153/188);
11 = Megeath et al. (2012, J/AJ/144/192);
12 = Kounkel et al. (2017, J/AJ/154/29);
13 = Rebull et al. (2006, J/ApJ/646/297);
14 = Furesz et al. (2008, J/ApJ/676/1109);
15 = Getman et al. (2005, J/ApJS/160/353);
16 = Hillenbrand (1997, J/AJ/113/1733);
17 = Da Rio et al. (2010, J/ApJ/722/1092);
18 = Da Rio et al. (2012, J/ApJ/748/14);
19 = Kuhn et al. (2014, J/ApJ/787/107);
20 = Getman et al. (2014, J/ApJ/787/109);
21 = Getman et al. (2014, J/ApJ/787/108);
22 = Sicilia-Aguilar et al. (2005, J/AJ/129/363).
Note (2): From Kounkel+ 2016, J/ApJ/821/8 and 2019, J/AJ/157/196
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History:
From electronic version of the journal
05-Jul-2021:Insert into VizieR
19-Nov-2021:2 Simbad name corrected in column "OName":
MLLA 993A is MLLA 993 in Simbad and
** S 490AB=Gaia DR2 3017360799155290368 = HD 37062
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Mar-2021