2014ApJ...780L...1Z

Query : 2014ApJ...780L...1Z

2014ApJ...780L...1Z - Astrophys. J., 780, L1 (2014/January-1)

An empirical connection between the ultraviolet color of early-type galaxies and the stellar initial mass function.

ZARITSKY D., GIL DE PAZ A. and BOUQUIN A.Y.K.

Abstract (from CDS):

Using new UV magnitudes for a sample of early-type galaxies (ETGs) with published stellar mass-to-light ratios, Υ*, we find a correlation between UV color and Υ* that is tighter than those previously identified between Υ*and either the central stellar velocity dispersion, metallicity, or alpha enhancement. The sense of the correlation is that galaxies with larger Υ*are bluer in the UV. We conjecture that differences in the lower mass end of the stellar initial mass function (IMF) are related to the nature of the extreme horizontal branch populations that are generally responsible for the UV flux in ETGs. If so, then UV color can be used to identify ETGs with particular IMF properties and to estimate Υ*.

Abstract Copyright: ∼

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: stellar content - stars: luminosity function, mass function

Simbad objects: 36

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Number of rows : 36
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 474 GiP 01 20 06.6870520512 +03 24 55.861973100 12.75 12.37 11.51 11.42 10.56 ~ 371 1
3 NGC 524 GiP 01 24 47.7429545736 +09 32 20.089023900   11.5       ~ 494 1
4 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 592 0
5 NGC 1023 AG? 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 689 2
6 NGC 2549 AG? 08 18 58.3507032336 +57 48 11.022298740   12.1       ~ 271 0
7 NGC 2695 GiG 08 54 27.0744277224 -03 04 00.993904032   13.3       ~ 115 0
8 NGC 2685 Sy2 08 55 34.7027817000 +58 44 03.876540108   13.68 12.70     ~ 459 1
9 NGC 2699 GiG 08 55 48.7851438216 -03 07 39.575588736   13.6       ~ 110 0
10 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 526 2
11 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 463 0
12 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 798 1
13 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1504 0
14 NGC 3384 GiG 10 48 16.8855574392 +12 37 45.371165844   10.0       ~ 617 1
15 NGC 3414 GiC 10 51 16.2099174408 +27 58 30.297624852   12.1       ~ 353 0
16 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 527 0
17 NGC 4262 GiG 12 19 30.5694336288 +14 52 39.517143276 13.00 12.49 11.55     ~ 378 1
18 NGC 4270 GiP 12 19 49.4714861496 +05 27 48.394930572   13.3       ~ 188 0
19 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 988 2
20 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 678 0
21 NGC 4458 GiP 12 28 57.5613938232 +13 14 30.946545276 13.27 12.93 12.07     ~ 429 2
22 NGC 4459 H2G 12 29 00.0329905416 +13 58 42.826603332   11.6       ~ 567 0
23 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 671 1
24 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
25 NGC 4546 Sy2 12 35 29.4931619736 -03 47 35.383858656 11.89 11.30 10.32     ~ 230 1
26 M 89 Sy2 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 1037 2
27 NGC 4564 GiG 12 36 26.9869512504 +11 26 21.204472848 12.51 12.05 11.12     ~ 615 1
28 NGC 4570 GiG 12 36 53.3828233728 +07 14 47.697174852   11.8       ~ 342 0
29 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 721 0
30 NGC 4660 GiP 12 44 31.9814021280 +11 11 25.739106972   12.1       ~ 434 0
31 NGC 5308 GiP 13 47 00.4361008824 +60 58 23.334066588   12.5       ~ 217 0
32 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
33 NGC 5838 GiG 15 05 26.2447857696 +02 05 57.349108392   12.1   10.26   ~ 252 0
34 NGC 5845 GiG 15 06 00.7823239488 +01 38 01.704838596   13.8 11.20 12.06 9.94 ~ 403 0
35 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
36 NAME Local Group GrG ~ ~           ~ 9325 0

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