2013ApJ...773..174G

Query : 2013ApJ...773..174G

2013ApJ...773..174G - Astrophys. J., 773, 174 (2013/August-3)

The nature of the second parameter in the IRX-β relation for local galaxies.

GRASHA K., CALZETTI D., ANDREWS J.E., LEE J.C. and DALE D.A.

Abstract (from CDS):

We present an analysis of 98 galaxies of low-dust content, selected from the Spitzer Local Volume Legacy survey, aimed at examining the relation between the ultraviolet (UV) color and dust attenuation in normal star-forming galaxies. The IRX-β diagram relates the total dust attenuation in a galaxy, traced by the far-IR (FIR) to UV ratio, to the observed UV color, indicated by β. Previous research has indicated that while starburst galaxies exhibit a relatively tight IRX-β relation, normal star-forming galaxies do not, and have a much larger spread in the total-IR to far-UV (FUV) luminosity for a fixed UV color. We examine the role that the age of the stellar population plays as the "second parameter" responsible for the observed deviation and spread of star-forming galaxies from the starburst relation. We model the FUV to FIR spectral energy distribution of each galaxy according to two broad bins of star formation history (SFH): constant and instantaneous burst. We find clear trends between stellar population mean age estimators (extinction-corrected FUV/NIR, U - B, and EW(Hα)) and the UV color β; the trends are mostly driven by the galaxies best-described by instantaneous burst populations. We also find a significant correlation between β and the mean age directly determined from the best-fit instantaneous models. As already indicated by other authors, the UV attenuation in star-forming galaxies may not be recovered with the UV color alone and is highly influenced by the stellar population's mean age and SFH. Overall, the scatter in the IRX-β diagram is better correlated with β than with the perpendicular distance, dp.

Abstract Copyright: ∼

Journal keyword(s): galaxies: star formation - infrared: galaxies - ultraviolet: galaxies

Simbad objects: 99

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Number of rows : 99
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 24 EmG 00 09 56.542 -24 57 47.27 12.12 12.20 11.58 11.46 11.5 ~ 269 1
2 NGC 45 Sy2 00 14 04.0072128696 -23 10 55.132646808 11.92 11.21 10.73 10.58 10.4 ~ 269 1
3 NGC 55 rG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 828 2
4 NGC 59 EmG 00 15 25.126 -21 26 39.68 14.01 13.21 12.59 12.31   ~ 111 0
5 IC 1574 AG? 00 43 03.82 -22 14 48.8 15.25 14.73 14.35 14.24 14.2 ~ 137 1
6 MCG-04-03-019 G 00 49 49.3 -21 00 58 16.11 15.64 15.36 14.8 15.5 ~ 144 1
7 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
8 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
9 Z 436-33 AG? 01 21 18.90 +12 24 43.0 15.36 14.82 14.36 12.87   ~ 112 0
10 Z 460-6 AG? 01 32 42.5190557016 +18 19 01.514434548 15.03 14.56 14.13 13.89   ~ 101 0
11 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
12 NGC 625 AGN 01 35 04.632 -41 26 10.32 12.37 11.78 11.25 11.03 11.5 ~ 312 2
13 UGC 1176 GiP 01 40 10.39 +15 54 18.6 14.60 14.38 14.02 13.69   ~ 108 0
14 MCG-07-04-032 AG? 01 45 03.74 -43 35 52.9 13.45 12.92 12.63 12.51 12.8 ~ 152 1
15 NGC 672 GiP 01 47 54.4764771528 +27 25 58.020709728 12.04 11.60 11.09 10.81   ~ 304 0
16 ESO 154-23 AG? 02 56 50.38 -54 34 17.1   12.63   12.18 12.5 ~ 123 0
17 NGC 1313 AG? 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 723 2
18 NGC 1311 Sy2 03 20 06.946 -52 11 07.76 13.89 13.35 12.93 12.75 13.1 ~ 136 0
19 NGC 1487 GiP 03 55 46.5 -42 22 01   12.28 11.68 11.74 11.02 ~ 124 0
20 NGC 1510 GiP 04 03 32.640 -43 24 00.58 14.23 13.63 13.24 13.09   ~ 201 1
21 NGC 1512 GiP 04 03 54.281 -43 20 55.86 11.30 11.43 10.54 10.37   ~ 457 1
22 NGC 1522 EmG 04 06 07.900 -52 40 05.91 14.53 14.16 13.78 13.62 14.0 ~ 70 0
23 NGC 1705 Sy2 04 54 13.4661493464 -53 21 39.471592428 12.32 12.96 12.56 12.58 12.9 ~ 692 1
24 NGC 1744 LSB 04 59 57.7383643080 -26 01 19.840639764 12.43 11.90 11.41 11.20 11.7 ~ 159 0
25 NGC 1800 EmG 05 06 25.737 -31 57 15.21 13.51 13.19 12.70 12.48 12.9 ~ 185 1
26 NGC 2500 GiG 08 01 53.1717201720 +50 44 13.602483780 11.98 12.20 11.62 11.34 10.85 ~ 215 2
27 NGC 2537 H2G 08 13 14.643 +45 59 23.25 12.18 12.50 11.69 11.66   ~ 314 2
28 IC 2233 LSB 08 13 58.909 +45 44 31.74 12.87 13.41 12.63 12.80   ~ 253 1
29 NGC 2552 EmG 08 19 20.5355420472 +50 00 34.590204468 13.44 13.00 12.56     ~ 284 1
30 MCG+07-18-004 LSB 08 28 28.560 +41 51 27.13   18       ~ 175 0
31 Z 311-8 GiG 08 34 07.20 +66 10 54.0 15.39 15.03 14.70 14.49   ~ 357 2
32 Z 180-37 AG? 09 07 34.759 +33 16 40.33   14.3       ~ 65 0
33 Z 35-7 AG? 09 34 44.716 +06 25 31.76   15.0       ~ 39 0
34 Z 152-72 EmG 09 50 22.769 +31 29 17.80   14.48   14.10   ~ 207 0
35 Z 153-5 AG? 09 56 46.047 +28 49 43.77 14.82 14.74 14.59 14.55 26.509 ~ 252 1
36 MCG+12-10-012 AG? 09 57 32.8632 +69 02 50.735 15.19 15.15 14.10 14.12   ~ 327 4
37 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
38 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
39 Z 333-17 LSB 10 05 30.45024 +70 21 51.4253 15.95 15.56 15.09 14.87   ~ 214 1
40 Z 64-68 AG? 10 07 20.182 +10 21 40.16   13.78   13.24   ~ 125 0
41 NGC 3239 AG? 10 25 04.867 +17 09 49.21   13.5       ~ 202 0
42 NGC 3274 EmG 10 32 17.2253817864 +27 40 07.165226244   13.30   12.77   ~ 261 0
43 Z 154-31 AG? 10 36 43.1428583040 +31 32 50.189204040   15.6   15.04   ~ 121 0
44 Z 184-6 AG? 10 42 42.787 +34 26 57.39   13.31 13.09 12.84 12.85 ~ 173 0
45 NGC 3344 EmG 10 43 31.150 +24 55 19.99 10.38 10.54 9.86 9.71   ~ 434 1
46 NGC 3377A GiP 10 47 22.4012897592 +14 04 16.697296020 14.17 14.31 13.61 13.51   ~ 150 1
47 Z 38-22 EmG 10 49 07.548 +06 55 02.61 15.41 14.86 14.21 13.93   ~ 79 0
48 MCG+11-13-039 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 170 0
49 NGC 3432 AG? 10 52 31.132 +36 37 07.60   11.81 11.67 11.29   ~ 321 1
50 NGC 3486 Sy2 11 00 23.946 +28 58 29.35 10.89 11.11 10.53 10.40   ~ 373 1
51 Z 11-98 EmG 11 27 12.2333953944 -00 59 41.002508328   14.973   14.335 14.7 ~ 45 0
52 Z 242-46 bCG 11 33 29.12 +49 14 17.4 14.69 14.61 14.25 14.17   ~ 242 1
53 NGC 3738 AGN 11 35 48.982 +54 31 24.70   12.12 12.04 11.56   ~ 303 0
54 NGC 3741 AG? 11 36 05.754 +45 17 02.96 15.01 14.55 14.23 14.06   ~ 237 0
55 MCG+04-28-057 GiC 11 48 57.4095791424 +23 50 14.907030000   15.29   14.63   ~ 76 0
56 Z 214-32 AG? 11 50 52.98254 +38 52 50.6594   13.72 13.9 13.39   ~ 175 0
57 Z 157-55 AG? 11 55 39.7060218792 +31 31 06.535928784   15.7       ~ 138 0
58 NGC 4068 AG? 12 04 03.265 +52 35 26.05   13.29   12.77   ~ 189 0
59 NGC 4144 GiG 12 09 58.601 +46 27 25.85   12.17   11.50   ~ 260 0
60 NGC 4163 LSB 12 12 09.34 +36 10 08.1 14.33 13.70 13.2 12.98   ~ 238 0
61 Z 269-47 AG? 12 15 23.652 +51 20 59.63   14.68   13.97   ~ 57 0
62 Z 269-49 AG? 12 15 46.626 +52 23 13.91   15.3       ~ 75 0
63 NGC 4288 GiG 12 20 38.119 +46 17 27.67   13.6       ~ 187 0
64 Z 244-7 GiG 12 21 15.01 +45 48 40.8   14.8       ~ 123 2
65 Z 244-18 bCG 12 26 15.69 +48 29 38.3   15.3       ~ 364 0
66 Z 187-44 GiP 12 27 05.566 +37 08 30.39   14.19   13.55   ~ 217 0
67 Z 216-4 GiG 12 27 40.90 +43 29 44.0 13.75 13.10 12.7 12.33   ~ 270 0
68 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
69 Z 187-46 GiP 12 28 28.084 +37 14 05.36   15.6       ~ 105 0
70 Z 187-47 GiG 12 28 38.743 +35 43 02.91 15.50 15.12 14.86 14.78   ~ 130 1
71 MCG+07-26-010 EmG 12 28 44.078 +43 13 25.79   16.0       ~ 106 0
72 NGC 4485 GiP 12 30 31.113 +41 42 04.22 12.10 12.42 11.93 11.93   ~ 305 2
73 Z 216-10 LSB 12 32 26.893 +42 42 14.84   13.7       ~ 130 0
74 Z 159-13 GiC 12 32 54.5 +31 32 30   13.50   13.03   ~ 180 0
75 Z 216-11 GiG 12 34 00.54952 +39 01 09.3052   15.4       ~ 65 0
76 Z 216-14 LSB 12 36 22.716 +40 00 18.72   15.2       ~ 95 0
77 NGC 4618 GiP 12 41 32.8976471760 +41 09 03.185175528 11.03 11.22 10.78     ~ 344 2
78 NGC 4625 SyG 12 41 52.7121819576 +41 16 26.115765780 12.74 12.92 12.35     ~ 383 2
79 IC 3687 GiG 12 42 15.1540831512 +38 30 05.844632940   15.5       ~ 153 0
80 NGC 4707 AG? 12 48 21.666 +51 09 53.81   15.2       ~ 113 0
81 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
82 Z 71-87 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 475 0
83 MCG-03-33-030 GiP 13 03 16.736 -17 25 22.91 13.98 13.42 13.09 12.96 13.3 ~ 135 0
84 Z 316-9 AG? 13 06 24.85 +67 42 25.0 14.08 13.61 13.08 12.98   ~ 268 1
85 NGC 5023 EmG 13 12 11.8036148808 +44 02 17.328663600   13.2       ~ 265 0
86 Z 217-18 LSB 13 12 51.779 +40 32 35.21   15.0       ~ 33 0
87 Z 217-20 LSB 13 13 53.848 +42 12 30.89   14.45   13.49   ~ 73 1
88 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
89 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 494 0
90 NGC 5264 GiG 13 41 36.683 -29 54 47.25 13.86 12.96 12.39 12.14 15.83 ~ 164 1
91 Z 190-66 AG? 13 50 51.3127548768 +38 01 14.958828876 15.56 14.78   14.33   ~ 161 0
92 NGC 5477 AG? 14 05 33.318 +54 27 37.85 13.94 14.36 14.01     ~ 224 1
93 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
94 NGC 5585 GiG 14 19 48.204 +56 43 44.58   11.73 11.216 11.12 10.123 ~ 455 0
95 Z 247-26 AG? 14 24 43.21 +44 31 41.8 14.24 13.54 13.17 13.07   ~ 217 0
96 IC 5052 G 20 52 01.633 -69 11 35.93 12.83 12.20 11.66 11.40   ~ 169 0
97 NGC 7064 AG? 21 29 02.34 -52 46 02.5 13.51 13.04 12.69 12.55 12.9 ~ 83 0
98 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
99 MCG-05-56-001 G 23 43 45.549 -31 57 24.37 14.55 14.03 13.73 13.63   ~ 162 1

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