A comparative study on the reliability of open cluster
parameters

J 2015

A comparative study on the reliability of open cluster parameters

NETOPIL, Martin, Ernst PAUNZEN a Giovanni CARRARO

Základní údaje

Originální název

A comparative study on the reliability of open cluster parameters

Autoři

NETOPIL, Martin (40 Rakousko, garant, domácí), Ernst PAUNZEN (40 Rakousko, domácí) a Giovanni CARRARO (380 Itálie)

Vydání

ASTRONOMY & ASTROPHYSICS, LES ULIS CEDEX A, EDP SCIENCES S A, 2015, 1432-0746

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: 5.185

Kód RIV

RIV/00216224:14310/15:00081324

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1051/0004-6361/201526372

UT WoS

000363538500019

Klíčová slova anglicky

open clusters and associations: general; Galaxy: fundamental parameters

Štítky

AKR, rivok

Změněno: 23. 3. 2016 15:49, Ing. Andrea Mikešková

Anotace

V originále

Open clusters are known as excellent tracers of the structure and chemical evolution of the Galactic disk, however, the accuracy and reliability of open cluster parameters is poorly known. In recent years, several studies aimed to present homogeneous open cluster parameter compilations, which are based on some different approaches and photometric data. These catalogues are excellent sources to facilitate testing of the actual accuracy of open cluster parameters. We compare seven cluster parameter compilations statistically and with an external sample, which comprises the mean results of individual studies. Furthermore, we selected the objects IC 4651, NGC 2158, NGC 2383, NGC 2489, NGC 2627, NGC 6603, and Trumpler 14, with the main aim to highlight differences in the fitting solutions. We derived correction terms for each cluster parameter, using the external calibration sample. Most results by the compilations are reasonable scaled, but there are trends or constant off sets of different degree. We also identified one data set, which appears too erroneous to allow adjustments. After the correction, the mean intrinsic errors amount to about 0.2 dex for the age, 0.08 mag for the reddening, and 0.35 mag for the distance modulus. However, there is no study that characterises the cluster morphologies of all test cases in a correct and consistent manner. Furthermore, we found that the largest compilations probably include at least 20 percent of problematic objects, for which the parameters differ significantly. These could be among others doubtful or unlikely open clusters that do not facilitate an unambiguous fitting solution.

Návaznosti

GP14-26115P, projekt VaV

Název: Vstříc k jednotné škále metalicity pro otevřené hvězdokupy

Investor: Grantová agentura ČR, Vstříc k jednotné škále metalicity pro otevřené hvězdokupy

3SGA5916, interní kód MU

Název: Hvězdy a hvězdokupy v Magellanových mračnech (Akronym: Webda MaC)

Investor: Jihomoravský kraj, Hvězdy a hvězdokupy v Magellanových mračnech, Granty pro zahraniční vědce

7AMB14AT015, projekt VaV

Název: Nový pohled na magnetické hvězdy (Akronym: MAGSTARS)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Nový pohled na magnetické hvězdy

Citovat

NETOPIL, Martin, Ernst PAUNZEN a Giovanni CARRARO. A comparative study on the reliability of open cluster parameters. ASTRONOMY & ASTROPHYSICS. LES ULIS CEDEX A: EDP SCIENCES S A, 2015, roč. 582, A19, s. 1-15. ISSN 1432-0746. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201526372.

@article{1321624,
   author = {Netopil, Martin and Paunzen, Ernst and Carraro, Giovanni},
   article_location = {LES ULIS CEDEX A},
   article_number = {A19},
   doi = {http://dx.doi.org/10.1051/0004-6361/201526372},
   keywords = {open clusters and associations: general; Galaxy: fundamental parameters},
   language = {eng},
   issn = {1432-0746},
   journal = {ASTRONOMY & ASTROPHYSICS},
   title = {A comparative study on the reliability of open cluster parameters},
   url = {http://adsabs.harvard.edu/abs/2015A%26A...582A..19N},
   volume = {582},
   year = {2015}
}

TY  - JOUR
ID  - 1321624
AU  - Netopil, Martin - Paunzen, Ernst - Carraro, Giovanni
PY  - 2015
TI  - A comparative study on the reliability of open cluster parameters
JF  - ASTRONOMY & ASTROPHYSICS
VL  - 582
IS  - A19
SP  - 1-15
EP  - 1-15
PB  - EDP SCIENCES S A
SN  - 14320746
KW  - open clusters and associations: general
KW  - Galaxy: fundamental parameters
UR  - http://adsabs.harvard.edu/abs/2015A%26A...582A..19N
L2  - http://adsabs.harvard.edu/abs/2015A%26A...582A..19N
N2  - Open clusters are known as excellent tracers of the structure and chemical evolution of the Galactic disk, however, the accuracy and reliability of open cluster parameters is poorly known. In recent years, several studies aimed to present homogeneous open cluster parameter compilations, which are based on some different approaches and photometric data. These catalogues are excellent sources to facilitate testing of the actual accuracy of open cluster parameters. We compare seven cluster parameter compilations statistically and with an external sample, which comprises the mean results of individual studies. Furthermore, we selected the objects IC 4651, NGC 2158, NGC 2383, NGC 2489, NGC 2627, NGC 6603, and Trumpler 14, with the main aim to highlight differences in the fitting solutions. We derived correction terms for each cluster parameter, using the external calibration sample. Most results by the compilations are reasonable scaled, but there are trends or constant off sets of different degree. We also identified one data set, which appears too erroneous to allow adjustments. After the correction, the mean intrinsic errors amount to about 0.2 dex for the age, 0.08 mag for the reddening, and 0.35 mag for the distance modulus. However, there is no study that characterises the cluster morphologies of all test cases in a correct and consistent manner. Furthermore, we found that the largest compilations probably include at least 20 percent of problematic objects, for which the parameters differ significantly. These could be among others doubtful or unlikely open clusters that do not facilitate an unambiguous fitting solution.
ER  -

NETOPIL, Martin, Ernst PAUNZEN a Giovanni CARRARO. A comparative study on the reliability of open cluster parameters. \textit{ASTRONOMY \&{}amp; ASTROPHYSICS}. LES ULIS CEDEX A: EDP SCIENCES S A, 2015, roč.~582, A19, s.~1-15. ISSN~1432-0746. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201526372.

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