Space Velocities of Southern Globular Clusters. VII. NGC 6397, NGC 6626 (M28), and NGC 6656 (M22)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F13%3A00069195" target="_blank" >RIV/00216224:14310/13:00069195 - isvavai.cz</a>

Výsledek na webu

<a href="http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1305.7431" target="_blank" >http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1305.7431</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0004-6256/146/2/33" target="_blank" >10.1088/0004-6256/146/2/33</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Space Velocities of Southern Globular Clusters. VII. NGC 6397, NGC 6626 (M28), and NGC 6656 (M22)

Popis výsledku v původním jazyce

We have measured the absolute proper motions of globular clusters NGC6397, NGC6626 (M22), and NGC6656 (M28) as part of our ongoing Southern Proper-Motion Program. The reference system is the ICRS via Hipparcos stars for these three low-Galactic-latitudeclusters. Formal errors range between ~0.3 and 0.7 mas/yr. Notable is the result for NGC6397, which differs by 2.5 mas/yr from two Hubble Space Telescope determinations while agreeing with previous ground-based ones. We determine orbits for all three clusters in an axisymmetric and barred model of the Galaxy and discuss these in the context of globular cluster formation. M22 is a well-known cluster with an iron abundance spread; such clusters are now believed to have formed in massive parent systems that can retain ejecta of core-collapsed supernovae.

Název v anglickém jazyce

Space Velocities of Southern Globular Clusters. VII. NGC 6397, NGC 6626 (M28), and NGC 6656 (M22)

Popis výsledku anglicky

We have measured the absolute proper motions of globular clusters NGC6397, NGC6626 (M22), and NGC6656 (M28) as part of our ongoing Southern Proper-Motion Program. The reference system is the ICRS via Hipparcos stars for these three low-Galactic-latitudeclusters. Formal errors range between ~0.3 and 0.7 mas/yr. Notable is the result for NGC6397, which differs by 2.5 mas/yr from two Hubble Space Telescope determinations while agreeing with previous ground-based ones. We determine orbits for all three clusters in an axisymmetric and barred model of the Galaxy and discuss these in the context of globular cluster formation. M22 is a well-known cluster with an iron abundance spread; such clusters are now believed to have formed in massive parent systems that can retain ejecta of core-collapsed supernovae.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

The Astronomical Journal

ISSN

0004-6256

e-ISSN

—

Svazek periodika

146

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

3

Strana od-do

33-35

Kód UT WoS článku

000321841100015

EID výsledku v databázi Scopus

—