Twin Masks of Spiral Structure? A Local Perspective

Steiman-Cameron, T. Y.

doi:10.1007/978-1-4419-7317-7_3

Cited by 5 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany. 4 Mizusawa VLBI (Very Long Baseline Interferometry) Observatory, National Astronomical Observatory of Japan, Japan. 5 the blue squares are the sources from Paper I.…”

Section: Resultsmentioning

confidence: 99%

The local spiral structure of the Milky Way

et al. 2016

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

The local spiral structure of the Milky Way

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The radio observations of [67] found the Sagittarius arm to be prominent, strongly detected and clearly defined, traced by massive star formation; they concluded that the Sagittarius arm is a major feature of the Galaxy, rather than a minor arm. The near-infrared range is biased by massive extinction of light by dust, so these data must be calibrated as a function of longitude [68,69]. Some observers prefer the near-infrared range of wavelengths; they concluded that the Sagittarius arm is not a true arm, nor is the Norma arm a true arm [70,71].…”

Section: Discussionmentioning

confidence: 99%

A guided map to the spiral arms in the galactic disk of the Milky Way

Vallée

2017

Astronomical Review

View full text Add to dashboard Cite

An up-to-date overview of the recent history is given, aiming is to present a helpful working guide to the literature and at the same time introduce key systems and observational results, starting from the Sun and going toward the Galactic Center and parts of the Zona Galactica Incognita, and beyond. We start by presenting an observational view of the Milky Way's disk plane (cartographic, dynamical, chemical crosscut, magnetic). This included the four long spiral arms in the disk of the Milky Way galaxy, their geometry, components, velocity, their widths and internal layers as well as onion-like ordered offsets, the central galactic bars, arm tangents, arm pitch and arm shape, arm origins near the Galactic Center, and other possible players in the spiral arm, such as the magnetic field and the dark matter content. After, we present a basic analysis of some theoretical predictions from galactic arm formation: numerical simulations or analytical theories, and observations are checked against predictions from various numerical simulations and analytical (theoretical) models.

show abstract

Catalog of Observed Tangents to the Spiral Arms in the Milky Way Galaxy

Vallée¹

2014

ApJS

View full text Add to dashboard Cite

From the Sun's location in the Galactic disk, one can use different arm tracers (CO, HI, thermal or ionized or relativistic electrons, masers, cold and hot dust, etc) to locate a tangent to each spiral arm in the disk of the Milky Way.We present a master Catalogue of the astronomically observed tangents to the Galaxy's spiral arms, using different arm tracers from the literature. Some arm tracers can have slightly divergent results from several papers, so a mean value is takensee Appendix for CO, HII, and masers. The Catalogue of means currently consists of 63 mean tracer entries, spread over many arms (Carina, Crux-Centaurus, Norma, Perseus origin, near 3-kpc, Scutum, Sagittarius) , stemming from 107 original arm tracer entries.Additionally, we updated and revised a previous statistical analysis of the angular offset and linear separation from the mid-arm, for each different mean arm tracer. Given enough arm tracers, and summing and averaging over all four spiral arms, one could determine if arm tracers have separate and parallel lanes in the Milky Way. This statistical analysis allows a crosscut of a galactic spiral arm to be made, confirming a recent discovery of a linear separation between arm tracers. Here, from the mid-arm's CO to the inner edge's hot dust, the arm halfwidth is about 340 pc; doubling would yield a full arm width of 680 pc. We briefly compare these observations with the predictions of many spiral arm theories, notably the density-wave theory.

show abstract

Twin Masks of Spiral Structure? A Local Perspective

Cited by 5 publications

References 39 publications

The local spiral structure of the Milky Way

The local spiral structure of the Milky Way

A guided map to the spiral arms in the galactic disk of the Milky Way

Catalog of Observed Tangents to the Spiral Arms in the Milky Way Galaxy

Contact Info

Product

Resources

About