The bar and spiral arms in the Milky Way: structure and kinematics

@article{Shen2020TheBA,
  title={The bar and spiral arms in the Milky Way: structure and kinematics},
  author={Juntai Shen and Xing-wu Zheng},
  journal={Research in Astronomy and Astrophysics},
  year={2020},
  volume={20}
}
The Milky Way is a spiral galaxy with the Schechter characteristic luminosity L*, thus an important anchor point of the Hubble sequence of all spiral galaxies. Yet the true appearance of the Milky Way has remained elusive for centuries. We review the current best understanding of the structure and kinematics of our home galaxy, and present an updated scientifically accurate visualization of the Milky Way structure with almost all components of the spiral arms, along with the COBE image in the… 

Gas Dynamics in the Galaxy: Total Mass Distribution and the Bar Pattern Speed

Gas morphology and kinematics in the Milky Way contain key information for understanding the formation and evolution of our Galaxy. We present hydrodynamical simulations based on realistic barred

Modeling of Spiral Structure in a Multi-Component Milky~Way-Like Galaxy

The maximum value in the rotation curve of the disk of the Milky Way galaxy, as found in its central regions, is explained by non-circular motion due to the presence of a bar and its orientation relative to an observer.

Galactic spiral structure revealed by Gaia EDR3

Using the astrometry and integrated photometry from the Gaia Early Data Release 3, we map the density variations in the distribution of young upper main sequence (UMS) stars, open clusters, and

Local spiral structure based on the Gaia EDR3 parallaxes

Context. The astrometric satellite Gaia is expected to significantly increase our knowledge as to the properties of the Milky Way. The Gaia Early Data Release 3 (EDR3) provides the most precise

Unveiling the nature of clusters in the Cygnus region. I. The embedded cluster DB2001–22

The Cygnus region harbours a vast diversity of rich stellar complexes. Hence, it is ideal for studying recently formed stellar clusters, and investigate how the feedback effect and radiation

A comparative study of satellite galaxies in Milky Way-like galaxies from HSC, DECaLS, and SDSS

We conduct a comprehensive and statistical study of the luminosity functions (LFs) for satellite galaxies, by counting photometric galaxies from HSC, DECaLS and SDSS around isolated central galaxies

The Observed Mass Distribution of Galactic Black Hole LMXBs Is Biased against Massive Black Holes

The discovery of gravitational-wave radiation from merging black holes (BHs) also uncovered BHs with masses in the range of ≈20–160 M ⊙. In contrast, the most massive Galactic stellar-mass BH

Distances, Radial Distribution, and Total Number of Galactic Supernova Remnants

We present a table of 215 supernova remnants (SNRs) with distances. New distances are found to SNR G51.26 + 0.11 of 6.6 ± 1.7 kpc using H i absorption spectra and to five other SNRs using

Preface: Frontiers in Astrophysics (II) —A special issue dedicated to the 20th anniversary of RAA (2001–2020)

On the arrival of the 20th anniversary of the journal, Research in Astronomy and Astrophysics (RAA), we see rapid progress in the frontiers of astronomy and astrophysics. To celebrate the birth and

The Episodic and Multiscale Galactic Centre

References

SHOWING 1-10 OF 166 REFERENCES

The local spiral structure of the Milky Way

Observed regions of massive star formation near the Local spiral arm of the Milky Way reveal that the Local Arm is larger than previously thought, and both its pitch angle and star formation rate are comparable to those of the Galaxy’s major spiral arms, such as Sagittarius and Perseus.

Gas dynamics and large-scale morphology of the Milky Way galaxy

We present a new model for the gas dynamics in the galactic disc inside the orbit of the Sun. Quasi-equilibrium flow solutions are determined in the gravitational potential of the deprojected COBE

The spiral structure of our Milky Way Galaxy

Context. The spiral structure of our Milky Way Galaxy is not yet known. HII regions and giant molecular clouds are the most prominent spiral tracers. Models with 2−4 arms have been proposed to

OUR MILKY WAY AS A PURE-DISK GALAXY—A CHALLENGE FOR GALAXY FORMATION

Bulges are commonly believed to form in the dynamical violence of galaxy collisions and mergers. Here, we model the stellar kinematics of the Bulge Radial Velocity Assay (BRAVA) and find no sign that

The structure of the Milky Way's bar outside the bulge

While it is incontrovertible that the inner Galaxy contains a bar, its structure near the Galactic plane has remained uncertain, where extinction from intervening dust is greatest. We investigate

Giant molecular filaments in the Milky Way

Throughout the Milky Way, molecular clouds typically appear filamentary, and mounting evidence indicates that this morphology plays an important role in star formation. What is not known is to what

Structural Analogs of the Milky Way Galaxy: Stellar Populations in the Boxy Bulges of NGC 4565 and NGC 5746

We present NGC 4565 and NGC 5746 as structural analogs of our Milky Way. All three are giant, SBb–SBbc galaxies with two pseudobulges, i.e., a compact, disky, star-forming pseudobulge embedded in a

MAPPING THE X-SHAPED MILKY WAY BULGE

We analyzed the distribution of the red clump (RC) stars throughout the Galactic bulge using Two Micron All Sky Survey data. We mapped the position of the RC in 1 deg2 fields within the area |l| ⩽

THE VERTICAL X-SHAPED STRUCTURE IN THE MILKY WAY: EVIDENCE FROM A SIMPLE BOXY BULGE MODEL

A vertical X-shaped structure in the Galactic bulge was recently reported. Here, we present evidence of a similar X-shaped structure in the Shen et al. 2010 bar/boxy bulge model that simultaneously

Tracing the long bar with red-clump giants

Context. Over the last decade a series of results have lent support to t he hypothesis of the existence of a long thin bar in the Milky Way with a half-length of 4.5 kpc and a position angle of
...