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The Outer Galactic Halo As Probed By RR Lyr Stars From the Palomar Transient Facility + Keck

Cohen, Judith and Sesar, Branimir and Banholzer, Sophianna (2016) The Outer Galactic Halo As Probed By RR Lyr Stars From the Palomar Transient Facility + Keck. In: The General Assembly of Galaxy Halos: Structure, Origin and Evolution. Proceedings of the International Astronomical Union. No.317. Cambridge University Press , Cambridge, pp. 91-96. ISBN 9781107138193. http://resolver.caltech.edu/CaltechAUTHORS:20160208-140133188

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Abstract

We present initial results from our study of the outer halo of the Milky Way using a large sample of RR Lyr(ab) variables datamined from the archives of the Palomar Transient Facility. Of the 464 RR Lyr in our sample with distances exceeding 50 kpc, 62 have been observed spectroscopically at the Keck Observatory. v _r and σ(v_r) are given as a function of distance between 50 and 110 kpc, and a very preliminary rather low total mass for the Milky Way out to 110 kpc of ~7 ± 1.5 × 10^(11) M⊙ is derived from our data.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1017/S174392131500976XDOIArticle
http://arxiv.org/abs/1509.05997arXivDiscussion Paper
ORCID:
AuthorORCID
Cohen, Judith0000-0002-8039-4673
Sesar, Branimir0000-0002-0834-3978
Additional Information:© 2016 International Astronomical Union. Published online: 09 May 2016.
Group:IPTF
Subject Keywords:The Galaxy, Galaxy: halo, stars: variables: RR Lyrae
Record Number:CaltechAUTHORS:20160208-140133188
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160208-140133188
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64306
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:08 Feb 2016 22:12
Last Modified:17 Nov 2017 00:31

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