2001MNRAS.327..849R

Query : 2001MNRAS.327..849R

2001MNRAS.327..849R - Mon. Not. R. Astron. Soc., 327, 849-867 (2001/November-1)

Recovering physical parameters from galaxy spectra using MOPED.

REICHARDT C., JIMENEZ R. and HEAVENS A.F.

Abstract (from CDS):

We derive physical parameters of galaxies from their observed spectra using MOPED, the optimized data compression algorithm of Heavens, Jimenez & Lahav. Here we concentrate on parametrizing galaxy properties, and apply the method to the NGC galaxies in Kennicutt's spectral atlas. We focus on deriving the star formation history, metallicity and dust content of galaxies. The method is very fast, taking a few seconds of CPU time to estimate ∼17 parameters, and is therefore specially suited to studying large data sets, such as the Anglo-Australian two-degree-field (2dF) galaxy survey and the Sloan Digital Sky Survey (SDSS). Without the power of MOPED, the recovery of star formation histories in these surveys would be impractical. In Kennicutt's atlas, we find that for the spheroidals a small recent burst of star formation is required to provide the best fit to the spectrum. There is clearly a need for theoretical stellar atmospheric models with spectral resolution better than 1Å if we are to extract all the rich information that large redshift surveys contain in their galaxy spectra.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): methods: data analysis - methods: statistical - galaxies: fundamental parameters - galaxies: statistics - galaxies: stellar content

Simbad objects: 53

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Number of rows : 53
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 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
2 NGC 1357 Sy2 03 33 17.0545498128 -13 39 50.970066984   12.44   11.8 11.3 ~ 152 0
3 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
4 NGC 1832 Sy2 05 12 03.3433348776 -15 41 16.021694220   12.2   11.07 11.8 ~ 245 1
5 NGC 2276 AG? 07 27 14.485 +85 45 16.20   12.3       ~ 393 0
6 NGC 2775 AG? 09 10 20.1334093488 +07 02 16.874157048   11.417 10.481 9.920 8.994 ~ 377 0
7 NGC 2798 GiG 09 17 22.95407 +41 59 58.9560 13.03 13.04 12.32     ~ 338 3
8 APG 283 PaG 09 17 26.99 +41 59 48.8   12.2       ~ 193 1
9 NGC 2903 AGN 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1204 3
10 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
11 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
12 NGC 3147 Sy2 10 16 53.6388580752 +73 24 02.641798224   11.43 10.61     ~ 533 2
13 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1807 2
14 NGC 3245 LIN 10 27 18.3864983136 +28 30 26.621599932   11.6       ~ 372 0
15 NGC 3303 LIN 10 37 00.0631479552 +18 08 08.888744688   14.5       ~ 84 0
16 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 809 1
17 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 862 1
18 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1504 0
19 NGC 3471 H2G 10 59 09.016 +61 31 49.63   13.0       ~ 133 1
20 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1638 0
21 M 65 GiP 11 18 55.9084654776 +13 05 32.300703672   9.6       ~ 458 1
22 M 66 AGN 11 20 15.0 +12 59 29 9.85 9.65 8.92     ~ 1509 4
23 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 1015 4
24 NGC 3690B GiP 11 28 31.02 +58 33 40.7   11.8       ~ 635 4
25 NGC 3690NE AGN 11 28 33.07 +58 33 54.2   11.8       ~ 635 4
26 NGC 3921 LIN 11 51 06.8803989360 +55 04 43.414457484   13.4 12.64     ~ 260 1
27 NGC 3941 Sy2 11 52 55.3609498656 +36 59 10.716212904   11.45 11.62 9.97   ~ 261 0
28 NGC 4194 rG 12 14 09.615 +54 31 35.93   13.79 13.30     ~ 467 2
29 NGC 4262 GiG 12 19 30.5694336288 +14 52 39.517143276 13.00 12.49 11.55     ~ 378 1
30 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
31 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
32 NGC 4485 GiP 12 30 31.113 +41 42 04.22 12.10 12.42 11.93 11.93   ~ 305 2
33 NGC 4648 GiG 12 41 44.3891511144 +74 25 15.700353240   12.6       ~ 125 0
34 NGC 4631 GiC 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 1154 3
35 NGC 4670 AG? 12 45 17.150 +27 07 31.76   12.6 12.90     ~ 271 0
36 NGC 4750 LIN 12 50 07.3113940944 +72 52 28.653179520   11.8       ~ 153 0
37 NGC 4775 EmG 12 53 45.707 -06 37 19.73   12.3   11.19 12.0 ~ 165 0
38 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
39 NGC 5195 GiG 13 29 59.590 +47 15 58.06 10.76 10.45 9.55 9.31   ~ 816 3
40 NGC 5248 G 13 37 32.0145074088 +08 53 06.496982448   11.4       ~ 554 0
41 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
42 M 102 SyG 15 06 29.561 +55 45 47.91 11.12 10.74 9.89     ~ 578 2
43 UGC 10033 IG 15 46 56.1 +17 52 42           ~ 118 0
44 NGC 5996 H2G 15 46 58.8879549840 +17 53 03.045863148   13.2       ~ 165 0
45 NGC 6052 rG 16 05 12.8715178104 +20 32 32.607297132 13.01 13.44 13.00     ~ 362 2
46 NGC 6181 H2G 16 32 20.96927 +19 49 35.7710   12.7       ~ 258 1
47 NGC 6217 AGN 16 32 39.2100852960 +78 11 53.487076092   14.37 13.88     ~ 320 0
48 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
49 NGC 6643 AG? 18 19 46.370 +74 34 06.23   11.80       ~ 320 1
50 NGC 6764 LIN 19 08 16.4036066688 +50 55 59.519979084   15.00 14.32     ~ 307 1
51 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
52 NGC 7714 AGN 23 36 14.1257730600 +02 09 18.197422668   14.91 14.36     ~ 788 1
53 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 608 0

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