English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Asymmetric spatial distribution of subsolar metallicity stars in the Milky Way nuclear star cluster

Feldmeier-Krause, A., Kerzendorf, W., Do, T., Nogueras-Lara, F., Neumayer, N., Walcher, C. J., et al. (2020). Asymmetric spatial distribution of subsolar metallicity stars in the Milky Way nuclear star cluster. Monthly Notices of the Royal Astronomical Society, 494(1), 396-410. doi:10.1093/mnras/staa703.

Item is

Files

show Files
hide Files
:
Asymmetric spatial distribution of subsolar metallicity stars in the Milky Way nuclear star cluster.pdf (Any fulltext), 5MB
 
File Permalink:
-
Name:
Asymmetric spatial distribution of subsolar metallicity stars in the Milky Way nuclear star cluster.pdf
Description:
-
OA-Status:
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Feldmeier-Krause, A., Author
Kerzendorf, W., Author
Do, T., Author
Nogueras-Lara, F., Author
Neumayer, N., Author
Walcher, C. J., Author
Seth, A., Author
Schödel, R., Author
de Zeeuw, P. T.1, Author           
Hilker, M., Author
Lützgendorf, N., Author
Kuntschner, H., Author
Kissler-Patig, M., Author
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

Content

show
hide
Free keywords: -
 Abstract: We present stellar metallicity measurements of more than 600 late-type stars in the central 10 pc of the Galactic Centre. Together with our previously published KMOS data, this data set allows us to investigate, for the first time, spatial variations of the nuclear star cluster’s metallicity distribution. Using the integral-field spectrograph KMOS (VLT), we observed almost half of the area enclosed by the nuclear star cluster’s effective radius. We extract spectra at medium spectral resolution and apply full spectral fitting utilizing the PHOENIX library of synthetic stellar spectra. The stellar metallicities range from [M/H] = −1.25 dex to [M/H] > +0.3 dex, with most of the stars having supersolar metallicity. We are able to measure an anisotropy of the stellar metallicity distribution. In the Galactic north, the portion of subsolar metallicity stars with [M/H] < 0.0 dex is more than twice as high as in the Galactic south. One possible explanation for different fractions of subsolar metallicity stars in different parts of the cluster is a recent merger event. We propose to test this hypothesis with high-resolution spectroscopy and by combining the metallicity information with kinematic data.

Details

show
hide
Language(s):
 Dates: 2020-03-30
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/staa703
Other: LOCALID: 3241996
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 494 (1) Sequence Number: - Start / End Page: 396 - 410 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150