2016AJ....152...72L


Query : 2016AJ....152...72L

2016AJ....152...72L - Astron. J., 152, 72-72 (2016/September-0)

Metallicity and age of the stellar stream around the disk galaxy NGC 5907.

LAINE S., GRILLMAIR C.J., CAPAK P., ARENDT R.G., ROMANOWSKY A.J., MARTINEZ-DELGADO D., ASHBY M.L.N., DAVIES J.E., MAJEWSKI S.R., BRODIE J.P., JAY GABANY R. and ARNOLD J.A.

Abstract (from CDS):

Stellar streams have become central to studies of the interaction histories of nearby galaxies. To characterize the most prominent parts of the stellar stream around the well-known nearby (d=17 Mpc) edge-on disk galaxy NGC 5907, we have obtained and analyzed new, deep gri Subaru/Suprime-Cam and 3.6 µm Spitzer/Infrared Array Camera observations. Combining the near-infrared 3.6 µm data with visible-light images allows us to use a long wavelength baseline to estimate the metallicity and age of the stellar population along an ∼60 kpc long segment of the stream. We have fitted the stellar spectral energy distribution with a single-burst stellar population synthesis model and we use it to distinguish between the proposed satellite accretion and minor/major merger formation models of the stellar stream around this galaxy. We conclude that a massive minor merger (stellar mass ratio of at least 1:8) can best account for the metallicity of -0.3 inferred along the brightest parts of the stream.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: evolution - galaxies: interactions - galaxies: structure - galaxies: structure

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12559 1
2 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1522 0
3 NAME Sagittarius Stream St* 02 22 +00.0           ~ 865 0
4 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2912 0
5 NGC 4013 GiG 11 58 31.417 +43 56 49.28   12.4       ~ 419 1
6 NGC 4651 LIN 12 43 42.6376070448 +16 23 36.002649300   11.30 10.92 10.42 9.84 ~ 510 0
7 NAME Styx Stream St* 13 56 24.0 +26 48 00           ~ 27 0
8 NGC 5387 AG? 13 58 24.807 +06 04 16.60   14.8       ~ 47 0
9 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 758 1
10 * bet Gru LP? 22 42 40.05027 -46 53 04.4752 5.33 3.73 2.11 0.20 -1.57 M4.5III 202 1
11 NAME Monoceros Stream St* ~ ~           ~ 355 1
12 NAME Orphan Stream St* ~ ~           ~ 250 0
13 NAME Anticenter Stream St* ~ ~           ~ 27 1

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