J/A+A/660/A11 Gaia distances to the Carina Nebula Complex (Goeppl+, 2022)
Gaia EDR3 distances of the young stellar clusters in the extended
Carina Nebula complex.
Goeppl C., Preibisch T.
<Astron. Astrophys. 660, A11 (2022)>
=2022A&A...660A..11G 2022A&A...660A..11G (SIMBAD/NED BibCode)
ADC_Keywords: Associations, stellar ; Stars, O ; Stars, B-type
Keywords: stars: formation - stars: pre-main sequence -
open clusters and associations: general
Abstract:
The Carina Nebula Complex (CNC) is one of the most massive and active
star forming regions in our Galaxy and contains several large young
star clusters. The distances of the individual clusters and their
physical connection was only poorly known up to now, with strongly
discrepant results reported in the literature.
We want to determine reliable distances of the young stellar clusters
in the central Carina Nebula region (in particular Tr 14, 15, and 16)
and the prominent clusters NGC 3324 and NGC 3293 in the north-western
periphery of the CNC.
We analyze the parallaxes in Gaia EDR3 for a comprehensive sample of
237 spectroscopically identified OB stars, as well as for 9562 X-ray
selected young stars throughout the complex. We also perform an
astrometric analysis to identify members of the young cluster vdBH 99,
which is located in the foreground of the north-western part of the
Carina Nebula.
We find that the distances of the investigated clusters in the CNC are
equal within ≤ 2%, and yield very consistent most likely mean
distance values of 2.36+0.05-0.05kpc for the OB star sample and
2.34+0.05-0.06kpc for the sample of X-ray selected young stars.
Our results show that the clusters in the CNC constitute a coherent
star forming region, in particular that NGC 3324 and NGC 3293 at the
north-western periphery are (within ≤2%) at the same distance as the
central Carina Nebula. For the foreground cluster vdBH 99 we find a
mean distance of 441+2-2pc and an age of ~=60Myr, and quantify the
contamination of X-ray selected samples of Carina Nebula stars by
members of this foreground cluster.
Description:
The sample of OB stars in the CNC is based on Smith
(2006MNRAS.367..763S 2006MNRAS.367..763S), Shull et al. (2021ApJ...914...18S 2021ApJ...914...18S), Preibisch
et al. (2014A&A...564A.120P 2014A&A...564A.120P), Evans et al. (2005A&A...437..467E 2005A&A...437..467E, Cat.
J/A+A/437/467) and Preibisch et al. (2021A&A...648A..34P 2021A&A...648A..34P, Cat.
J/A+A/648/A34). The table contains the Gaia EDR3 astrometric
properties (position, parallax), the stellar type and the stellar
cluster of the OB stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 178 240 List of OB stars in the CNC
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See also:
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
J/A+A/437/467 : VLT-FLAMES survey of massive stars (Evans+, 2005)
J/A+A/648/A34 : KMOS O-type star detection in Tr 16-SE (Preibisch+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaEDR3 Gaia EDR3 Source id
21- 37 A17 --- Name Name
39- 56 F18.14 deg RAdeg Gaia EDR3 Right Ascension (ICRS) at Ep=2016.0
58- 76 F19.15 deg DEdeg Gaia EDR3 Declination (ICRS) at Ep=2016.0
78- 95 F18.16 mas Plx Gaia EDR3 Parallax
97-105 F9.6 mas offsetPlx ? Parallax offset (1)
107-117 F11.9 mas e_Plx Gaia EDR3 Parallax error
119-139 A21 --- SpType Spectral type (2)
141-154 A14 --- Cluster Cluster (3)
156-178 A23 --- Com Comment
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Note (1): The Offset was calculated with the algorithm provided by
Lindegren et al. (2021A&A...649A...4L 2021A&A...649A...4L).
Note (2): Taken from Simbad, Fitzgerald & Mehta (1987MNRAS.228..545F 1987MNRAS.228..545F),
Preibisch et al. (2021A&A...648A..34P 2021A&A...648A..34P, Cat. J/A+A/648/A34),
Evans et al. (2005A&A...437..467E 2005A&A...437..467E, Cat. J/A+A/437/467)
and Morrell et al. (1988PASP..100.1431M 1988PASP..100.1431M).
Note (3): Based on Smith (2006MNRAS.367..763S 2006MNRAS.367..763S), Shull et al.
(2021ApJ...914...18S 2021ApJ...914...18S), Preibisch et al. (2014A&A...564A.120P 2014A&A...564A.120P),
Evans et al. (2005A&A...437..467E 2005A&A...437..467E, Cat. J/A+A/437/467) and Preibisch et al.
(2021A&A...648A..34P 2021A&A...648A..34P, Cat. J/A+A/648/A34).
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Acknowledgements:
Thomas Preibisch, preibisch(at)usm.uni-muenchen.de
(End) Patricia Vannier [CDS] 29-Jan-2022