ATTENZIONE! IL REPOSITORY E’ APERTO ESCLUSIVAMENTE ALL’IMMISSIONE DEI RAPPORTI TECNICI (COLLEZIONE 4.01). NON E’ POSSIBILE INSERIRE PRODOTTI IN TUTTE LE ALTRE COLLEZIONI, A CAUSA DI PROBLEMI TECNICI. THE REPOSITORY IS OPEN EXCLUSIVELY FOR THE SUBMISSION OF TECHNICAL REPORTS (COLLECTION 4.01). SUBMISSIONS TO ALL OTHER COLLECTIONS ARE TEMPORARILY UNAVAILABLE, DUE TO TECHNICAL ISSUES.
 

Phase-space Correlation in Stellar Streams of the Milky Way Halo: The Clash of Kshir and GD-1

Journal
Date Issued
2019
Author(s)
Malhan, Khyati
•
Ibata, Rodrigo A.
•
Carlberg, Raymond G.
•
•
Famaey, Benoit
•
Martin, Nicolas F.
DOI
Abstract
We report the discovery of a 70^\circ long stellar stream in the Milky Way halo, which criss-crosses the well known “GD-1” stream. We show that this new stellar structure (“Kshir”) and GD-1 lie at similar distance, and are remarkably correlated in kinematics. We propose several explanations for the nature of this new structure and its possible association with GD-1. However, a scenario in which these two streams were accreted onto the Milky Way within the same dark matter sub-halo seems to provide a natural explanation for their phase-space entanglement, and other complexities of this coupled system.

Based on observations obtained at the Canada─France─Hawaii Telescope (CFHT), which is operated by the National Research Council of Canada, the Institut National des Sciences de l’Univers of the Centre National de la Recherche Scientique of France, and the University of Hawaii.

Volume
886
Issue
1
Start page
L7
Uri
Url
Issn Identifier
2041-8205
Ads BibCode
2019ApJ...886L...7M
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

1911.00009.pdf

Description
preprint
Size

605.3 KB

Format

Adobe PDF

Checksum (MD5)

0595a13d629c080f7d3c10917818983d

Loading...
Thumbnail Image
Name

Malhan_2019_ApJL_886_L7.pdf

Description
pdf editoriale
Size

1.19 MB

Format

Adobe PDF

Checksum (MD5)

21523d10f8f440116050150d6e04a41d