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Resource Record Summary

Catalog Service:
SAGA -Stellar Abundances for Galactic Archeology Database-

Short name: SAGA
IVOA Identifier: ivo://jvo/sagaPublisher: JVO
More Info: http://saga.sci.hokudai.ac.jp
VO Compliance: Level 2: This is a VO-compliant resource.
Status: active
Registered: 2010 Aug 17 01:50:25Z
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Description


We describe the construction of a database of extremely metal-poor (EMP) stars in the Galactic halo whose elemental abundances have been determined. Our database contains detailed elemental abundances, reported equivalent widths, atmospheric parameters, photometry, and binarity status, compiled from papers in the recent literature that report studies of EMP halo stars with [Fe/H] < -2.5. The compilation procedures for this database have been designed to assemble the data effectively from electronic tables available from online journals. We have also developed a data retrieval system that enables data searches by various criteria, and permits the user to explore relationships between the stored variables graphically. Currently, our sample includes 1212 unique stars (many of which are studied by more than one group) with more than 15000 individual reported elemental abundances, covering all of the relevant papers published by December 2007. We discuss the global characteristics of the present database, as revealed by the EMP stars observed to date. For stars with [Fe/H] < -2.5, the number of giants with reported abundances is larger than that of dwarfs by a factor of two. The fraction of carbon-rich stars (among the sample for which the carbon abundance is reported) amount to ~30 % for [Fe/H] < -2.5. We find that known binaries exhibit different distributions of orbital period, according to whether they are giants or dwarfs, and also as a function of metallicity, although the total sample of such stars is still quite small.

More About this Resource

About the Resource Providers

This section describes who is responsible for this resource

Publisher: JVO

Creators:
Takuma SudaYutaka Katsutaand Shimako Yamada.

Contact Information:
X JVO admin
Email: help_desk at jvo.nao.ac.jp

Status of This Resource

This section provides some status information: the resource version, availability, and relevant dates.

Version: n/a
Availability: This is an active resource.
  • This service provides only public data.

This resource was registered on: 2010 Aug 17 01:50:25Z
This resource description was last updated on: 2019 Nov 14 03:49:35Z

What This Resource is About

This section describes what the resource is, what it contains, and how it might be relevant.

Resource Class: CatalogService
This resource is a service that provides access to catalog data. You can extract data from the catalog by issuing a query, and the matching data is returned as a table.
Resource type keywords:
  • Catalog
Subject keywords:
  • stars
  • metal poor stars
Intended audience or use:
  • Research: This resource provides information appropriate for supporting scientific research.
More Info: http://saga.sci.hokudai.ac.jp

Rights and Usage Information

This section describes the rights and usage information for this data.

Rights:

Available Service Interfaces

Table Access ProtocolXX

This is a standard IVOA service that takes as input an ADQL or PQL query and returns tabular data.

VO Compliance: Level 1: This is a valid resource description.Level 2: This is a VO-compliant resource.
Description:
TAP interface for this catalog
Available endpoints for the standard interface:
  • http://jvo.nao.ac.jp/skynode/do/tap/sagaX(version 1.0 compatible)


Developed with the support of the National Science Foundation
under Cooperative Agreement AST0122449 with the Johns Hopkins University
The NAVO project is a member of the International Virtual Observatory Alliance

This NAVO Application is hosted by the Space Telescope Science Institute

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