Rings and Radial Waves in the Disk of the Milky Way

@article{Xu2015RingsAR,
  title={Rings and Radial Waves in the Disk of the Milky Way},
  author={Yan Xu and Heidi Jo Newberg and Jeffrey L. Carlin and Chao Liu and Licai Deng and Jing Li and Ralph Schonrich and Brian Yanny},
  journal={arXiv: Astrophysics of Galaxies},
  year={2015}
}
We show that in the anticenter region, between Galactic longitudes of $110^\circ<l<229^\circ$, there is an oscillating asymmetry in the main sequence star counts on either side of the Galactic plane using data from the Sloan Digital Sky Survey. This asymmetry oscillates from more stars in the north at distances of about 2 kpc from the Sun to more stars in the south at 4-6 kpc from the Sun to more stars in the north at distances of 8-10 kpc from the Sun. We also see evidence that there are more… Expand
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Rings and Radial Waves in the Disk of the Milky Way
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References

SHOWING 1-10 OF 69 REFERENCES
A Low-Latitude Halo Stream around the Milky Way
We present evidence for a ring of stars in the plane of the Milky Way, extending at least from l = 180° to 227° with turnoff magnitude g ~ 19.5; the ring could encircle the Galaxy. We infer that the… Expand
ON RINGS AND STREAMS IN THE GALACTIC ANTI-CENTER
We confirm that there are at least three separate low-latitude overdensities of blue F turnoff stars near the Milky Way anti-center: the Monoceros Ring, the Anti-Center Stream (ACS), and the Eastern… Expand
The Edge of the Galactic Disc
As part of a stellar population sampling program, a series of photometric probes at various field sizes and depths have been obtained in a low extinction window in the galactic anticentre direction.… Expand
SUBSTRUCTURE IN BULK VELOCITIES OF MILKY WAY DISK STARS
We find that Galactic disk stars near the anticenter exhibit velocity asymmetries in both the Galactocentric radial and vertical components across the midplane as well as azimuthally. These findings… Expand
One ring to encompass them all: a giant stellar structure that surrounds the Galaxy
TLDR
Evidence is presented that the curious stellar population found by the Sloan Digital Sky Survey in the Galactic anticentre direction extends to other distant fields that skirt the plane of the Milky Way, suggesting that the outer rim of the Galaxy ends in a low surface brightness stellar ring. Expand
The Ghost of Sagittarius and Lumps in the Halo of the Milky Way
We identify new structures in the halo of the Milky Way from positions, colors, and magnitudes of five million stars detected in the Sloan Digital Sky Survey. Most of these stars are within 126 of… Expand
A dwarf galaxy remnant in Canis Major: the fossil of an in-plane accretion on to the Milky Way
TLDR
An analysis of the asymmetries in the population of Galactic M-giant stars present in the 2MASS All Sky catalogue suggests that the Canis Major dwarf galaxy is a building block of the Galactic thick disk, that the thick disk is continually growing, even up to the present time, and that thick disk globular clusters were accreted onto the Milky Way from dwarf galaxies in co-planar orbits. Expand
The Stellar Number Density Distribution in the Local Solar Neighborhood is North-South Asymmetric
We study the number density distribution of a sample of K and M dwarf stars, matched north and south of the Galactic plane within a distance of 2 kpc from the Sun, using observations from the Ninth… Expand
Stellar Population Studies with the SDSS. I. The Vertical Distribution of Stars in the Milky Way
We present star count data from the Sloan Digital Sky Survey for 5.8 × 105 stars brighter than g' = 21 mag over 279 deg2 in two samples north and south of the Galactic plane. Using these… Expand
Galactic halo stellar structures in the Triangulum-Andromeda region
This Letter reports on the Galactic stellar structures that appear in the foreground of our Canada-France-Hawaii-Telecopse/MegaCam survey of the halo of the Andromeda galaxy. We recover the main… Expand
...
1
2
3
4
5
...