Aggregates of clusters in the Gaia data

J 2021

Aggregates of clusters in the Gaia data

PIECKA, Martin a Ernst PAUNZEN

Základní údaje

Originální název

Aggregates of clusters in the Gaia data

Autoři

PIECKA, Martin (703 Slovensko, garant, domácí) a Ernst PAUNZEN (40 Rakousko, domácí)

Vydání

Astronomy and Astrophysics, EDP Sciences, 2021, 0004-6361

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 6.240

Kód RIV

RIV/00216224:14310/21:00121741

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1051/0004-6361/202040139

UT WoS

000655634500002

Klíčová slova anglicky

open clusters and associations: general; astrometry

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 10. 6. 2021 09:56, Mgr. Marie Šípková, DiS.

Anotace

V originále

Context. The precision of the parallax measurements by Gaia is unprecedented. As of Gaia Data Release 2, the number of known nearby open clusters has increased. Some of the clusters appear to be relatively close to each other and form aggregates, which makes them interesting objects to study.Aims. We study the aggregates of clusters which share several of the assigned member stars in relatively narrow volumes of the phase space.Methods. Using the most recent list of open clusters, we compare the cited central parallaxes with the histograms of parallax distributions of cluster aggregates. The aggregates were chosen based on the member stars which are shared by multiple clusters.Results. Many of the clusters in the aggregates have been assigned parallaxes which coincide with the histograms. However, clusters that share a large number of members in a small volume of the phase space display parallax distributions which do not coincide with the values from the literature. This is the result of ignoring a possibility of assigning multiple probabilities to a single star. We propose that this small number of clusters should be analysed anew.

Návaznosti

MUNI/IGA/1530/2020, interní kód MU

Název: Automatic procedure for deriving open cluster metallicities (Akronym: OCL_PPP)

Investor: Masarykova univerzita, Automatic procedure for deriving open cluster metallicities

98507, interní kód MU

Název: European Collaborating Astronomer ProjectS: Espana-Czechia-Slovakia (Akronym: ECAPS:E-C-S)

Investor: Evropská unie, European Collaborating Astronomer ProjectS: Espana-Czechia-Slovakia, Strategická partnerství v oblasti vzdělávání, odborné přípravy a mládeže

Citovat

PIECKA, Martin a Ernst PAUNZEN. Aggregates of clusters in the Gaia data. Astronomy and Astrophysics. EDP Sciences, 2021, roč. 649, May, s. "A54", 12 s. ISSN 0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/202040139.

@article{1775039,
   author = {Piecka, Martin and Paunzen, Ernst},
   article_number = {May},
   doi = {http://dx.doi.org/10.1051/0004-6361/202040139},
   keywords = {open clusters and associations: general; astrometry},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Aggregates of clusters in the Gaia data},
   url = {https://doi.org/10.1051/0004-6361/202040139},
   volume = {649},
   year = {2021}
}

TY  - JOUR
ID  - 1775039
AU  - Piecka, Martin - Paunzen, Ernst
PY  - 2021
TI  - Aggregates of clusters in the Gaia data
JF  - Astronomy and Astrophysics
VL  - 649
IS  - May
SP  - "A54"
EP  - "A54"
PB  - EDP Sciences
SN  - 00046361
KW  - open clusters and associations: general
KW  - astrometry
UR  - https://doi.org/10.1051/0004-6361/202040139
N2  - Context. The precision of the parallax measurements by Gaia is unprecedented. As of Gaia Data Release 2, the number of known nearby open clusters has increased. Some of the clusters appear to be relatively close to each other and form aggregates, which makes them interesting objects to study.Aims. We study the aggregates of clusters which share several of the assigned member stars in relatively narrow volumes of the phase space.Methods. Using the most recent list of open clusters, we compare the cited central parallaxes with the histograms of parallax distributions of cluster aggregates. The aggregates were chosen based on the member stars which are shared by multiple clusters.Results. Many of the clusters in the aggregates have been assigned parallaxes which coincide with the histograms. However, clusters that share a large number of members in a small volume of the phase space display parallax distributions which do not coincide with the values from the literature. This is the result of ignoring a possibility of assigning multiple probabilities to a single star. We propose that this small number of clusters should be analysed anew.
ER  -

PIECKA, Martin a Ernst PAUNZEN. Aggregates of clusters in the Gaia data. \textit{Astronomy and Astrophysics}. EDP Sciences, 2021, roč.~649, May, s.~''A54'', 12 s. ISSN~0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/202040139.

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