Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31716
Title: Evidence of a Dwarf Galaxy Stream Populating the Inner Milky Way Halo
Authors: Malhan, Khyati
Yuan, Zhen
Ibata, Rodrigo A.
Arentsen, Anke
BELLAZZINI, Michele 
Martin, Nicolas F.
Issue Date: 2021
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 920
Issue: 1
First Page: 51
Abstract: Stellar streams produced from dwarf galaxies provide direct evidence of the hierarchical formation of the Milky Way. Here, we present the first comprehensive study of the LMS-1 stellar stream, that we detect by searching for wide streams in the Gaia EDR3 data set using the STREAMFINDER algorithm. This stream was recently discovered by Yuan et al. We detect LMS-1 as a 60 long stream to the north of the galactic bulge, at a distance of ∼20 kpc from the Sun, together with additional components that suggest that the overall stream is completely wrapped around the inner Galaxy. Using spectroscopic measurements from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the Sloan Digital Sky Survey, and the Apache Point Observatory Galactic Evolution Experiment, we infer that the stream is very metal-poor ([Fe/H] = -2.1) with a significant metallicity dispersion (σ [Fe/H] = 0.4), and it possesses a large radial velocity dispersion (σ v = 20 4 km s-1). These estimates together imply that LMS-1 is a dwarf galaxy stream. The orbit of LMS-1 is close to polar, with an inclination of 75 to the galactic plane. Both the orbit and metallicity of LMS-1 are remarkably similar to the globular clusters NGC 5053, NGC 5024, and the stellar stream Indus. These findings make LMS-1 an important contributor to the stellar population of the inner Milky Way halo.
URI: http://hdl.handle.net/20.500.12386/31716
URL: https://iopscience.iop.org/article/10.3847/1538-4357/ac1675
https://api.elsevier.com/content/abstract/scopus_id/85117718571
ISSN: 0004-637X
DOI: 10.3847/1538-4357/ac1675
Bibcode ADS: 2021ApJ...920...51M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat
2104.09523.pdfpreprint2.32 MBAdobe PDFView/Open
Malhan_2021_ApJ_920_51.pdf[Administrators only]2.17 MBAdobe PDF
Show full item record

Page view(s)

7
checked on Jul 5, 2022

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE