SIMBAD references

2019ApJ...872..152I - Astrophys. J., 872, 152-152 (2019/February-3)

The streams of the gaping abyss: a population of entangled stellar streams surrounding the inner Galaxy.


Abstract (from CDS):

We present the discovery of a large population of stellar streams that surround the inner Galaxy, found in the Gaia DR2 catalog using the new STREAMFINDER algorithm. Here we focus on the properties of eight new high-significance structures found at heliocentric distances between 1 and 10 kpc and at Galactic latitudes | b| > 20, named Slidr, Sylgr, Ylgr, Fimbulthul, Svol, Fjorm, Gjoll, and Leiptr. Spectroscopic measurements of seven of the streams confirm the detections, which are based on Gaia astrometry and photometry alone, and show that these streams are predominantly metal-poor. The sample possesses diverse orbital properties, although most of the streams appear to be debris of inner-halo globular clusters. Many more candidate streams are visible in our maps but require follow-up spectroscopy to confirm their nature. We also explain in detail the workings of the algorithm and gauge the incidence of false detections by running the algorithm on a smooth model of the Gaia catalog.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: formation - Galaxy: halo - Galaxy: stellar content - Galaxy: structure - surveys

Nomenclature: NAME Slidr Stream N=1. NAME Sylgr Stream N=1. NAME Ylgr Stream. NAME Fimulthul Stream N=1. NAME Svol Stream N=1. NAME Fjorm Stream N=1. NAME Gjoll Stream N=1. NAME Leiptr Stream N=1.

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 38

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