2016AJ....151....4D

Query : 2016AJ....151....4D

2016AJ....151....4D - Astron. J., 151, 4 (2016/January-0)

Radial star formation histories in 15 nearby galaxies.

DALE D.A., BELTZ-MOHRMANN G.D., EGAN A.A., HATLESTAD A.J., HERZOG L.J., LEUNG A.S., McLANE J.N., PHENICIE C., ROBERTS J.S., BARNES K.L., BOQUIEN M., CALZETTI D., COOK D.O., KOBULNICKY H.A., STAUDAHER S.M. and VAN ZEE L.

Abstract (from CDS):

New deep optical and near-infrared imaging is combined with archival ultraviolet and infrared data for 15 nearby galaxies mapped in the Spitzer Extended Disk Galaxy Exploration Science survey. These images are particularly deep and thus excellent for studying the low surface brightness outskirts of these disk-dominated galaxies with stellar masses ranging between 108 and 1011M☉. The spectral energy distributions derived from this data set are modeled to investigate the radial variations in the galaxy colors and star formation histories. Taken as a whole, the sample shows bluer and younger stars for larger radii until reversing near the optical radius, whereafter the trend is for redder and older stars for larger galacto-centric distances. These results are consistent with an inside-out disk formation scenario coupled with an old stellar outer disk population formed through radial migration and/or the cumulative history of minor mergers and accretions of satellite dwarf galaxies. However, these trends are quite modest and the variation from galaxy to galaxy is substantial. Additional data for a larger sample of galaxies are needed to confirm or dismiss these modest sample-wide trends.

Abstract Copyright: ∼

Journal keyword(s): galaxies: formation - galaxies: halos - galaxies: photometry - galaxies: star formation

Simbad objects: 23

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Number of rows : 23
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     ~ 12717 1
2 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1510 2
3 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5865 1
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7118 0
5 NGC 3180 GiG 10 18 16.985 +41 25 27.77   10.4       ~ 737 0
6 NGC 4220 GiP 12 16 11.7271475400 +47 53 00.116701188   12.4       ~ 153 0
7 UGC 7301 GiC 12 16 42.081 +46 04 43.56   15.49       ~ 62 1
8 NGC 4242 GiG 12 17 30.1835103480 +45 37 09.508940220   11.37 10.83     ~ 270 1
9 NGC 4420 GiG 12 26 58.4368542672 +02 29 39.725748780   12.7       ~ 182 0
10 NGC 4485 GiP 12 30 31.113 +41 42 04.22 12.10 12.42 11.93 11.93   ~ 286 2
11 NGC 4490 GiP 12 30 34.5 +41 38 26 10.03 10.22 9.79     ~ 577 3
12 NGC 4618 GiP 12 41 32.8976471760 +41 09 03.185175528 11.03 11.22 10.78     ~ 329 2
13 NGC 4625 GiP 12 41 52.7121819576 +41 16 26.115765780 12.74 12.92 12.35     ~ 366 2
14 NGC 4707 AG? 12 48 21.666 +51 09 53.81   15.2       ~ 106 0
15 NGC 5005 GiP 13 10 56.312 +37 03 32.19   14.67 13.67     ~ 543 2
16 UGC 8303 GiP 13 13 17.60 +36 13 03.0   13.73   12.96   ~ 88 1
17 UGC 8320 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 282 0
18 M 63 LIN 13 15 49.2741893928 +42 01 45.728076108   9.34 8.59 8.35   ~ 1226 2
19 NGC 5229 LSB 13 34 02.831 +47 54 55.68   14.6       ~ 141 0
20 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2587 2
21 NGC 5273 Sy1 13 42 08.3801616672 +35 39 15.467518836   14.01 13.12     ~ 471 0
22 NGC 5523 AG? 14 14 52.310 +25 19 03.41   13.40       ~ 122 0
23 NGC 5608 AG? 14 23 18.734 +41 46 36.60   13.96   13.23   ~ 76 0

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