|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
A Pair of Bootes: A New Milky Way Satellite | | S.M. Walsh
; H. Jerjen
; B. Willman
; | | Date: |
10 May 2007 | | Subject: | Astrophysics (astro-ph) | | Abstract: | As part of preparations for a southern sky search for faint Milky Way dwarf
galaxy satellites, we report the discovery of a stellar overdensity in the
Sloan Digital Sky Survey Data Release 5, lying at an angular distance of only
1.5 degrees from the recently discovered Bo{"o}tes dwarf. The overdensity was
detected well above statistical noise by employing a sophisticated data mining
algorithm and does not correspond to any catalogued object. Overlaid isochrones
using stellar population synthesis models show that the color-magnitude diagram
of that region has the signature of an old (12 Gyr), metal-poor (${
m
Fe/H}approx-2.0$) stellar population at a tentative distance of 60 kpc,
evidently the same heliocentric distance as the Bo"otes dwarf. We estimate the
new object to have a total magnitude of $M_{V}sim-3.1pm1.1$ mag and a
half-light radius of $r_{h}=4’.1pm1’.6$ ($72pm28$ pc) placing it in an
apparent $40<r_{h}<100$ pc void between globular clusters and dwarf galaxies,
occupied only by another recently discovered Milky Way Satellite, Coma
Berenices. | | Source: | arXiv, arxiv.0705.1378 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER