2020NatAs...4.1078N

Query : 2020NatAs...4.1078N

2020NatAs...4.1078N - Nature Astronomy, 4, 1078-1083 (2020/November-0)

Evidence for a vast prograde stellar stream in the solar vicinity.

NECIB L., OSTDIEK B., LISANTI M., COHEN T., FREYTSIS M., GARRISON-KIMMEL S., HOPKINS P.F., WETZEL A. and SANDERSON R.

Abstract (from CDS):

Massive dwarf galaxies that merge with the Milky Way on prograde orbits can be dragged into the disk plane before being completely disrupted. Such mergers can contribute to an accreted stellar disk and a dark matter disk. Here we present Nyx, a vast stellar stream in the vicinity of the Sun, which provides the first indication that such an event occurred in the Milky Way. We identify about 200 stars that have coherent radial and prograde motion in this stream using a catalogue of accreted stars built by applying deep learning methods to the Gaia data. Taken together with chemical abundance and orbital information, these results strongly favour the interpretation that Nyx is the remnant of a disrupted dwarf galaxy. Further justified by FIRE hydrodynamic simulations, we demonstrate that prograde streams like Nyx can be found in the disk plane of galaxies and identified using our methods.

Abstract Copyright: ©

Journal keyword(s):

Errata: erratum vol. 6, art. 866 (2022)

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Nyx Stream St* ~ ~           ~ 15 0

Query : 2020NatAs...4.1078N

Basic data :
NAME Nyx Stream -- Stellar Stream
Other object types: otypes_help 		St* (2020NatAs)
ICRS coord. (ep=J2000) : 		No Coord.

Identifiers (1) :
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NAME Nyx Stream

References (15 between 1850 and 2026) (Total 15)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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