Probing the Disk Kinematics of M31 with DESI

Struan Stevenson

doi:10.2218/esjs.9976

Probing the Disk Kinematics of M31 with DESI

Struan Stevenson

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

M31’s stellar rotation curve and disk line-of-sight dispersion is presented usingkinematic data from a novel DESI M31 survey in combination with similardatasets. After removing the foreground, the disk region is isolated and thevelocity field deprojected. A flat ring model is fit to the velocity field of M31out to 30 kpc using a maximum-likelihood routine. The stellar rotation curveis found to flatten to∼220km/s, and a disk line-of-sight velocity dispersionof∼60km/s is derived. The results extend M31’s rotation curve to 30 kpcand support the picture in which M31 has thicker disk than the Milky Way.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Edinburgh Student Journal of Science
Volume	1
Issue number	2
DOIs	https://doi.org/10.2218/esjs.9976
Publication status	Published - 24 Oct 2024

Keywords / Materials (for Non-textual outputs)

Andromeda Galaxy
Stellar Kinematics
Galaxy Dynamics
Galaxy Evolution

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10.2218/esjs.9976Licence: Creative Commons: Attribution (CC-BY)

Cite this

@article{a7f775bb78e6486292ef336b3453386f,

title = "Probing the Disk Kinematics of M31 with DESI",

abstract = "M31{\textquoteright}s stellar rotation curve and disk line-of-sight dispersion is presented usingkinematic data from a novel DESI M31 survey in combination with similardatasets. After removing the foreground, the disk region is isolated and thevelocity field deprojected. A flat ring model is fit to the velocity field of M31out to 30 kpc using a maximum-likelihood routine. The stellar rotation curveis found to flatten to∼220km/s, and a disk line-of-sight velocity dispersionof∼60km/s is derived. The results extend M31{\textquoteright}s rotation curve to 30 kpcand support the picture in which M31 has thicker disk than the Milky Way.",

keywords = "Andromeda Galaxy, Stellar Kinematics, Galaxy Dynamics, Galaxy Evolution",

author = "Struan Stevenson",

year = "2024",

month = oct,

day = "24",

doi = "10.2218/esjs.9976",

language = "English",

volume = "1",

pages = "1--5",

journal = "Edinburgh Student Journal of Science",

number = "2",

}

TY - JOUR

T1 - Probing the Disk Kinematics of M31 with DESI

AU - Stevenson, Struan

PY - 2024/10/24

Y1 - 2024/10/24

N2 - M31’s stellar rotation curve and disk line-of-sight dispersion is presented usingkinematic data from a novel DESI M31 survey in combination with similardatasets. After removing the foreground, the disk region is isolated and thevelocity field deprojected. A flat ring model is fit to the velocity field of M31out to 30 kpc using a maximum-likelihood routine. The stellar rotation curveis found to flatten to∼220km/s, and a disk line-of-sight velocity dispersionof∼60km/s is derived. The results extend M31’s rotation curve to 30 kpcand support the picture in which M31 has thicker disk than the Milky Way.

AB - M31’s stellar rotation curve and disk line-of-sight dispersion is presented usingkinematic data from a novel DESI M31 survey in combination with similardatasets. After removing the foreground, the disk region is isolated and thevelocity field deprojected. A flat ring model is fit to the velocity field of M31out to 30 kpc using a maximum-likelihood routine. The stellar rotation curveis found to flatten to∼220km/s, and a disk line-of-sight velocity dispersionof∼60km/s is derived. The results extend M31’s rotation curve to 30 kpcand support the picture in which M31 has thicker disk than the Milky Way.

KW - Andromeda Galaxy

KW - Stellar Kinematics

KW - Galaxy Dynamics

KW - Galaxy Evolution

UR - https://doi.org/10.2218/esjs.9976

U2 - 10.2218/esjs.9976

DO - 10.2218/esjs.9976

M3 - Article

VL - 1

SP - 1

EP - 5

JO - Edinburgh Student Journal of Science

JF - Edinburgh Student Journal of Science

IS - 2

ER -

Probing the Disk Kinematics of M31 with DESI

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Keywords / Materials (for Non-textual outputs)

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