Extension of the C star rotation curve of the Milky Way to 24 kpc

Abstract

Demers and Battinelli published, in 2007 the rotation curve of the Milky Way based on the radial velocity of carbon stars outside the Solar circle. Since then we have established a new list of candidates for spectroscopy. The goal of this paper is to determine the rotation curve of the galaxy, as far as possible from the galactic center, using N type carbon stars. The stars were selected from their dereddened 2MASS colours, then the spectra were obtained with the Dominion Astrophysical Observatory and Asiago 1.8 meter telescopes. This publication adds radial velocities and Galactrocentric distances of 36 carbon stars, from which 20 are new confirmed. The new results for stars up to 25 kpc from the galactic center, suggest that the rotation curve shows a slight decline beyond the Solar circle.

13 pages, 3 figures, 1 table; accepted for publication in Astrophysics

References in corpus (2)

• Outer structure of the Galactic warp and flare: explaining the Canis Major over-density
• Carbon-Rich Mira Variables: Kinematics and Absolute Magnitudes

Cited by in corpus (15)

• The Milky Way's rotation curve out to 100 kpc and its constraint on the Galactic mass distribution
• Evidence for dark matter in the inner Milky Way
• Dynamical constraints on the dark matter distribution in the Milky Way
• The fraction of dark matter within galaxies from the IllustrisTNG simulations
• Rotation and Mass in the Milky Way and Spiral Galaxies
• Galactic masers: kinematics, spiral structure and the disk dynamic state
• Recent advances in the determination of some Galactic constants in the Milky Way
• Bayesian reconstruction of the Milky Way dark matter distribution
• Carbon stars from LAMOST DR2 data
• The dark matter profile of the Milky Way: a non-parametric reconstruction
• $\text{galkin}$: a new compilation of the Milky Way rotation curve data
• Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning
• The GALAH survey: a catalogue of carbon-enhanced stars and CEMP candidates
• Median Statistics Estimate of the Galactic Rotational Velocity
• Magnetic flux density from the relative circular motion of stars and partially ionized gas in the Galaxy mid-plane vicinity