J/ApJ/865/73 GOBELINS. V. Kinematics of Perseus (Ortiz-Leon+, 2018)
The Gould's Belt Distances Survey (GOBELINS).
V. Distances and kinematics of the Perseus molecular cloud.
Ortiz-Leon G.N., Loinard L., Dzib S.A., Galli P.A.B., Kounkel M.,
Mioduszewski A.J., Rodriguez L.F., Torres R.M., Hartmann L., Boden A.F.,
Evans N.J., Briceno C., Tobin J.J.
<Astrophys. J., 865, 73 (2018)>
=2018ApJ...865...73O 2018ApJ...865...73O
ADC_Keywords: Proper motions; Parallaxes, trigonometric; Radial velocities;
Infrared sources; Optical; Clusters, open; Star Forming Region
Keywords: astrometry; radiation mechanisms: non-thermal; radio continuum: stars;
stars: individual (IC 348, NGC 1333); techniques: interferometric
Abstract:
We derive the distance and structure of the Perseus molecular cloud by
combining trigonometric parallaxes from Very Long Baseline Array
(VLBA) observations, taken as part of the GOBELINS survey and Gaia
Data Release 2. Based on our VLBA astrometry, we obtain a distance of
321±10pc for IC 348. This is fully consistent with the mean distance
of 320±26 measured by Gaia. The VLBA observations toward NGC 1333
are insufficient to claim a successful distance measurement to this
cluster. Gaia parallaxes, on the other hand, yield a mean distance of
293±22pc. Hence, the distance along the line of sight between the
eastern and western edges of the cloud is ∼30pc, which is
significantly smaller than previously inferred. We use Gaia proper
motions and published radial velocities to derive the spatial
velocities of a selected sample of stars. The average velocity vectors
with respect to the LSR are (u,v,w)=(-6.1±1.6, 6.8±1.1, -0.9±1.2)
and (-6.4±1.0, 2.1±1.4, -2.4±1.0)km/s for IC 348 and NGC 1333,
respectively. Finally, our analysis of the kinematics of the stars has
shown that there is no clear evidence of expansion, contraction, or
rotational motions within the clusters.
Description:
In total, 59 sources were observed with the VLBA between 2011 April
and 2018 March at ν=5.0 or 8.4GHz (C and X band, respectively). The
data were recorded in dual-polarization mode with 256MHz of bandwidth
in each polarization, covered by eight separate 32MHz
intermediate-frequency (IF) channels.
We use the data products from Kounkel+ (2018, J/AJ/156/84) who
recently reported on a new reduction of the APOGEE data taken in
Orion, IC 348, NGC 1333, and other regions. The radial velocities were
measured at multiple epochs with typical baselines of a few months.
The number of sources used to investigate the kinematics of the clouds
is 133 in IC 348 and 31 in NGC 1333. Their computed radial velocities
are given in Table 7. See Section 6 for further explanations.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table7.dat 61 164 Astrometric parameters and radial velocities of
individual sources in IC 348 and NGC 1333
table8.dat 80 164 Spatial velocities and positions of
individual sources in IC 348 and NGC 1333
--------------------------------------------------------------------------------
See also:
II/197 : ISM towards IC 348 and Per OB2 (Cernis, 1993)
I/347 : 1.33 billion stars distances in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/117/354 : OB associations from Hipparcos (de Zeeuw+, 1999)
J/AJ/135/2496 : Near-IR survey of Class I protostars (Connelley+, 2008)
J/ApJ/674/336 : Spitzer observations of NGC 1333 (Gutermuth+, 2008)
J/ApJ/692/973 : Protostars in Perseus, Serpens and Ophiuchus (Enoch+, 2009)
J/ApJ/710/1247 : Dense cores in Gould Belt clouds (Sadavoy+, 2010)
J/A+A/539/A64 : X-ray data for IC 348 young stars (Alexander+, 2012)
J/ApJ/794/125 : IN-SYNC. I. APOGEE stellar parameters (Cottaar+, 2014)
J/ApJ/786/29 : Catalog of distances to molecular clouds (Schlafly+, 2014)
J/ApJ/807/27 : IN-SYNC. III. RVs of IC348 stars (Cottaar+, 2015)
J/ApJS/220/11 : SEDs of Spitzer YSOs in the Gould Belt (Dunham+, 2015)
J/ApJ/799/136 : IN-SYNC. II. Candidate young stars in NGC 1333 (Foster+, 2015)
J/AJ/150/40 : The Spitzer c2d survey of clouds. XII. Perseus (Young+, 2015)
J/ApJ/818/116 : Gould's Belt VLA survey. V. Perseus region (Pech+, 2016)
J/ApJ/818/73 : Protostars in the Perseus molecular cloud (Tobin+, 2016)
J/ApJ/834/142 : Gould's Belt Distances Survey. II. OMC (Kounkel+, 2017)
J/ApJ/859/33 : GOBELINS. IV. VLBA obs. of Taurus (Galli+, 2018)
J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 -- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
19- 22 F4.2 mas plx [2.4/4] Star parallax
24- 27 F4.2 mas e_plx [0.04/1.5] Error in plx
29- 33 F5.2 mas/yr pmRA [2.7/10.2] Gaia proper motion in RA
35- 38 F4.2 mas/yr e_pmRA [0.07/2.8] Error in pmRA
40- 45 F6.2 mas/yr pmDE [-11.3/-4.8] Gaia proper motion in DEC
47- 50 F4.2 mas/yr e_pmDE [0.04/1.4] Error in pmDE
52- 56 F5.2 km/s RVel [12.3/28.7] Radial Velocity
58- 61 F4.2 km/s e_RVel [0/2] Error in RVel
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table8.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 -- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
19- 24 F6.2 km/s Ulsr [-28.3/-14.3] LSR velocity in x-direction
26- 31 F6.2 km/s Vlsr [-15.1/-2.3] LSR velocity in y-direction
33- 38 F6.2 km/s Wlsr [-13.3/-6] LSR velocity in z-direction
40- 45 F6.2 km/s u [-17.2/-3.2] Peculiar velocity in x-direction
47- 51 F5.2 km/s v [-2.1/10.7] Peculiar velocity in y-direction
53- 57 F5.2 km/s w [-6.1/1.3] Peculiar velocity in z-direction
59- 65 F7.2 pc X [-288.2/-254.6] X position
67- 72 F6.2 pc Y [99.9/103.1] Y position
74- 80 F7.2 pc Z [-103.7/-96.8] Z position
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Ortiz-Leon et al. Paper I. 2017ApJ...834..141O 2017ApJ...834..141O
Ortiz-Leon et al. Paper II. 2017ApJ...834..142O 2017ApJ...834..142O Cat. J/ApJ/834/142
Ortiz-Leon et al. Paper III. 2017ApJ...834..143O 2017ApJ...834..143O
Galli et al. Paper IV. 2018ApJ...859...33G 2018ApJ...859...33G Cat. J/ApJ/859/33
Ortiz-Leon et al. Paper V. 2018ApJ...865...73O 2018ApJ...865...73O This catalog
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 29-Aug-2019