J/MNRAS/505/5164 The Gaia view of the Cepheus flare (Szilagyi+, 2021)
The Gaia view of the Cepheus flare.
Szilagyi M., Kun M., Abraham P.
<Mon. Not. R. Astron. Soc. 505, 5164 (2021)>
=2021MNRAS.505.5164S 2021MNRAS.505.5164S (SIMBAD/NED BibCode)
ADC_Keywords: Parallaxes, trigonometric ; Proper motions ;
Stars, pre-main sequence ; YSOs
Keywords: stars: formation - stars: pre-main-sequence - ISM: clouds -
ISM: individual objects: Cepheus flare
Abstract:
We present a new census of candidate pre-main-sequence stars in the
Cepheus flare star-forming region, based on Gaia EDR3 parallaxes,
proper motions, and colour-magnitude diagrams. We identified new
candidate members of the previously known young stellar groups
associated with NGC 7023, L1177, L1217/L1219, L1228, L1235, and
L1251. We studied the 3D structure of the star-forming complex and the
distribution of tangential velocities of the young stars. The young
stellar groups are located between 330 and 368pc from the Sun,
divided into three kinematic subgroups, and have ages between 1 and 5
million yr. The results confirm the scenario of propagating star
formation, suggested by previous studies. In addition to the bulk
pre-main-sequence star population between 330 and 370pc, there is a
scattered and more evolved pre-main-sequence population around
150-180pc. We found new candidate members of the nearby Cepheus
Association, and identified a new moving group of 46, 15-20 million yr
old pre-main-sequence stars located at a distance of 178pc, around
the A0-type star HD 190833. A few pre-main-sequence stars are
located at 800-900 pc, indicative of star-forming regions associated
with the Galactic local arm above the Galactic latitude of +10°.
Description:
The list of known young stars of Cepheus flare having Gaia EDR3
counterparts (Table A1). Gaia EDR3 identifiers, coordinates,
distances, tangential velocities along Galactic longitude and
latitude, and other names of the new candidate cluster members are
listed (Table A2). Gaia EDR3 identifiers, coordinates, distances,
tangential velocities along Galactic longitude and latitude, and other
names of the new candidate members of the Cepheus Association and
HD190833 group (Table A2). List of candidate Class II YSOs classified
with AllWISE/2MASS data (Table A3).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 274 176 Known YSOs of the Cepheus Flare observed by Gaia
tablea2a.dat 528 99 Members of the Cepheus Association and HD 190833
group identified based on Gaia data (close groups)
tablea2b.dat 528 319 Members of molecular clouds identified based on
Gaia data
tablea3.dat 66 40 Candidate Class II YSOs classified with
AllWISE/2MASS data
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See also:
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)
II/328 : AllWISE Data Release (Cutri+ 2013)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 28 A28 --- Name Star identifier
30- 48 I19 --- GaiaEDR3 Gaia EDR3 source id
50- 65 A16 --- 2MASS 2MASS identifier
67- 87 F21.17 deg RAdeg Right ascension (ICRS) at Ep=2016.0
89-105 F17.14 deg DEdeg Declination (ICRS) at Ep=2016.0
107-127 F21.17 mas/yr pmRA Proper motion in right ascension
129-150 F22.18 mas/yr pmDE Proper motion in declination
152-171 F20.17 mas Plx Parallax
173-192 F20.18 mas e_Plx Error of the parallax
194-213 F20.14 pc rgeo Distance from Bailer-Jones et al.
(2021, Cat. I/352)
215-233 F19.14 pc b_rgeo 16th percentile of distance posterior from
Bailer-Jones et al. (2021, Cat. I/352)
235-254 F20.14 pc B_rgeo 84th percentile of distance posterior from
Bailer-Jones et al. (2021, Cat. I/352)
256-274 F19.16 --- RUWE Renormalized unit-weight error
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Byte-by-byte Description of file: tablea2a.dat tablea2b.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Cloud Group or cloud identifier (1)
21- 49 A29 --- Name Star identifier
51- 79 A29 --- GaiaEDR3 Gaia EDR3 identifier
81- 96 A16 --- 2MASS 2MASS identifier
98-118 F21.17 deg RAdeg Right ascension (ICRS) at Ep=2016.0
120-136 F17.14 deg DEdeg Declination (ICRS) at Ep=2016.0
138-155 F18.14 deg GLON Galactic longitude
157-174 F18.15 deg GLAT Galactic latitude
176-193 F18.14 pc rgeo Distance from Bailer-Jones et al.
(2021, Cat. I/352)
195-212 F18.14 pc b_rgeo 16th percentile of distance posterior from
Bailer-Jones et al. (2021, Cat. I/352)
214-231 F18.14 pc B_rgeo 84th percentile of distance posterior from
Bailer-Jones et al. (2021, Cat. I/352)
233-250 F18.16 mas Plx Parallax
252-271 F20.18 mas e_Plx Error of the parallax
273-291 F19.16 mas/yr pmRA Proper motion in right ascension
293-312 F20.18 mas/yr e_pmRA Error of the proper motion in right ascension
314-333 F20.17 mas/yr pmDE Proper motion in declination
335-354 F20.18 mas/yr e_pmDE Error of the proper motion in declination
356-374 F19.16 km/s vL Tangential velocity in galactic longitude
376-395 F20.16 km/s vB Tangential velocity in galactic latitude
397-414 F18.15 mag Gmag Gaia magnitude in G band
416-433 F18.15 mag BPmag ? Gaia magnitude in GBP band
435-452 F18.15 mag RPmag ? Gaia magnitude in GRP band
454-471 F18.15 mag Jmag ? Gaia magnitude in 2MASS J band
473-490 F18.15 mag Hmag ? Gaia magnitude in 2MASS H band
492-509 F18.15 mag Kmag ? Gaia magnitude in 2MASS K band
511-528 F18.16 --- RUWE Renormalized unit-weight error
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Note (1): Cepheus Association or HD 190833 group for tablea2a,
L1148/L1158, L1177, L1217/L1219, L1228, L1235, L1251, NGC7023 for tablea2b.
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 28 A28 --- Name Star identifier
30- 48 A19 --- ALLWISE AllWISE identifier
50- 66 A17 --- Type YSO type
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History:
From Mate Szilagyi, szilagyi.mate(at)csfk.org
Acknowledgements:
This work has made use of data from the European Space Agency (ESA)
mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia
Data Processing and Analysis Consortium (DPAC,
https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the
DPAC has been provided by national institutions, in particular the
institutions participating in the Gaia Multilateral Agreement.
(End) Patricia Vannier [CDS] 07-Jul-2021