Available Spiral Arm Models
The following table provides a summary of the spiral arm models included in SpiralMap.
Model |
Description |
---|---|
Taylor_Cordes_1992 |
Model based on HII regions |
Drimmel_NIR_2000 |
Based on Galactic plane emission in N |
Levine_2006 |
Based on HI (21 cm) data |
Hou_Han_2014 |
Logarithmic spiral using HII/GMC/Maser data |
Reid_2019 |
MASER parallax model |
Poggio_cont_2021 |
Map based on Upper Main Sequence stars |
GaiaPVP_cont_2022 |
OB star map from Gaia Collaboration |
Drimmel_Ceph_2024 |
Based on Cepheid variables |
Taylor_Cordes_1992
Class implementing the model from Taylor & Cordes et al. 1993 which is based on radio and optical observations of H II regions.
We use the model parameters presented in their Table 1.
There are four arms in this model (Arm1, Arm2, Arm3, Arm4).
Drimmel_NIR_2000
Class implementing the model from Drimmel 2000, which is based on Galactic plane emission profiles in the K band using COBE data.
Model publicly available.
There are two arms (1_arm, 2_arm) and two inter-arm regions (3_interarm, 4_interarm) in this model.
Levine_2006
Class implementing the logarithmic spiral framework as described in Levine et al. 2006 based on HI observations.
Model taken from their Table 1.
There are four arms in this model (Arm1, Arm2, Arm3, Arm4).
Hou_Han_2014
Class built upon the polynomial-logarithmic formulation introduced by Hou et al. 2014, based on a combination of H II, giant molecular clouds, and methanol MASER catalogs.
Model publicly available.
There are six arms in this model (Norma, Scutum-Centaurus, Sagittarius-Carina, Perseus, Local, Outer).
Reid_2019
Class implementing the model by Reid et al. 2019 based on radio astrometry of MASERS.
Model taken from their Table 2.
There are seven arms in this model (3-kpc, Norma, Sct-Cen, Sgr-Car, Local, Perseus, Outer).
Poggio_cont_2021
Class used to extract the 2D contour maps of upper-main sequence stars by Poggio et al. 2021. The maps are based on Gaia EDR3 astrometry.
Data is available publicly, and also included in the package with their permission.
GaiaPVP_cont_2022
Class used to extract the 2D contour maps of OB stars by Gaia collaboration et al. 2022. The maps are based on Gaia DR3 astrometry & astrophysical parameters.
Data is available publicly, and also included in the package with their permission.
Drimmel_Ceph_2024
This class implements the model by Drimmel et al. 2024. It is based on a sample of 2857 dynamically young Milky Way Cepheids.
Model is publicly available but also included in the package as a userfriendly pickle file, with their permission.
There are four arms in this model (Scutum, Sag-Car, Orion, Perseus).