J/AJ/164/57 810 candidate members of 9 groups in Perseus (Kounkel+, 2022)
Dynamical Star-forming History of Per OB2.
Kounkel M., Deng T., Stassun K.G.
<Astron. J., 164, 57-57 (2022)>
=2022AJ....164...57K 2022AJ....164...57K (SIMBAD/NED BibCode)
ADC_Keywords: Star Forming Region; Parallaxes, trigonometric; Proper motions;
Radial velocities; Photometry, G band
Keywords: Interstellar dynamics; Star forming regions; Proper motions
Young star clusters
Abstract:
We analyze the internal dynamics of young stars toward Perseus using
Gaia EDR3 data, including PerOB2 and California Cloud. Interpreting
the current dynamics, we speculate that PerOB2 may have formed from
two separate clouds that have begun forming stars in close proximity
to each other. IC348 is caught in the middle between the two of them,
inheriting kinematics of both, and it stands out as a possible site of
cloud-cloud interaction. We also consider the possibility of a past
supernova in PerOB2-while one has likely occurred, it does not appear
to have caused any obvious triggered star formation, but it has
created a shock that has swept the molecular gas away from IC348.
Finally, we examine a recently proposed shell between Taurus and
Perseus. While its origin is unknown, we find no support for an
expanding bubble in stellar kinematics, nor can we identify a likely
progenitor for a supernova that may have caused it, disfavoring this
scenario in the formation of this apparent shell.
Description:
We have used Gaia EDR3 data to obtain a census of stars toward
Perseus. In addition to the astrometry, we use radial velocities from
Gaia DR2, medium-resolution LAMOST DR7 and APOGEE DR17 when possible.
Objects:
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RA (2000) DE Designation(s)
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03 42 11.99 +33 25 59.9 Per OB2 = Ass Per OB 2
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 188 810 Candidate members of young groups in perseus
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
V/156 : LAMOST DR7 catalogs (Luo+, 2019)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 I18 --- Gaia Gaia EDR3 source identifier
20- 28 F9.6 deg RAdeg [50/70] Degree of right ascension
(ICRS=2016.0)
30- 38 F9.6 deg DEdeg [29/38] Degree of declination (ICRS=2016.0)
40- 44 F5.3 mas plx [1.62/3.96] Gaia EDR3 parallax
46- 50 F5.3 mas e_plx [0.01/0.3] Error on plx
52- 56 F5.3 mas/yr pmRA [1.33/9.23] Heliocentric proper motion in RA
58- 62 F5.3 mas/yr e_pmRA [0.01/0.3] Error in pmRA
64- 71 F8.4 mas/yr pmDE [-10.8/-3.79] Heliocentric proper motion in DE
73- 78 F6.4 mas/yr e_pmDE [0.009/0.3] Error in pmDE
80- 86 F7.3 km/s RVel [-40/55.3]? Heliocentric radial velocity
88- 93 F6.3 km/s e_RVel [0.04/40]? Error in RVel
95-100 A6 --- r_RVel Refernce used for RVel; APOGEE, Gaia or LAMOST
102-111 F10.6 deg GLON [157/167] Galactic longitude (l)
113-122 F10.6 deg GLAT [-22/-7] Galactic latitude (b)
124-130 F7.4 km/s vlsrl [-6.28/1.8] LSR corrected tangential velocity
in GLON
132-138 F7.4 km/s vlsrb [-1.57/4.19] LSR corrected tangential velocity
in GLAT
140-147 F8.4 km/s vlsrv [-49/530]? LSR corrected radial velocity
149-154 F6.3 mag Gmag [7.52/18] G-band magnitude
156-161 F6.3 mag BPmag [7.59/20.7]? BP-band magnitude
163-168 F6.3 mag RPmag [7.33/16.7]? RP-band magnitude
170-177 F8.6 --- PMS [0/1] Probability of a star being PMS
179-188 A10 --- Group Group membership
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History:
From electronic version of the journal
(End) Prepared by Coralie Fix [CDS], 10-Jan-2023