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Query : 2009MNRAS.400.1181Z |
2009MNRAS.400.1181Z - Mon. Not. R. Astron. Soc., 400, 1181-1198 (2009/December-2)
Resolved stellar mass maps of galaxies - I. Method and implications for global mass estimates.
ZIBETTI S., CHARLOT S. and RIX H.-W.
Abstract (from CDS):
As the most practical and robust, and hence fiducial method, we express the M/L in the H band as a function of (g - i) and (i - H). Stellar mass maps computed in this way have a typical accuracy of 30 per cent or less at any given pixel, determined from the scatter in the models. We compare maps obtained with our fiducial method with those derived using other combinations of bandpasses: (i) mass maps based on the M/L in NIR bands require one optical and one optical-NIR colour to avoid significant biases as a function of the local physical properties of a galaxy; (ii) maps based on M/L in i band as a function of (g - i) only are generally in excellent agreement with our best optical-NIR set, except for extremely star-forming and dust extincted regions. We further compute stellar mass maps using a model library identical to the previous one except for being based on older SPS models, which assume shorter lived TP-AGB stars. The M/L in the NIR inferred using these old models may be up to 2.5 times larger than the new ones, but this varies strongly as a function of colours and is maximal for the bluest colours.
Finally, we compare total stellar mass estimates obtained by integrating resolved mass maps with those obtained with unresolved photometry. In galaxies with evident dust lanes, unresolved estimates may miss up to 40 per cent of the total stellar mass because dusty regions are strongly under-represented in the luminous fluxes.
Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS
Journal keyword(s): techniques: image processing - techniques: photometric - galaxies: fundamental parameters - galaxies: general - galaxies: photometry - galaxies: stellar content
Simbad objects: 13
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 81 | Sy2 | 09 55 33.1726556496 | +69 03 55.062505368 | 7.89 | 6.94 | ~ | 4449 | 3 | |||
2 | NGC 3521 | G | 11 05 48.5680991376 | -00 02 09.245076540 | 10.06 | 9.83 | 9.02 | 10.1 | 9.6 | ~ | 817 | 2 |
3 | NAME Coma Supercluster | SCG | 11 23 | +23.9 | ~ | 270 | 0 | |||||
4 | M 99 | H2G | 12 18 49.625 | +14 24 59.36 | 10.45 | 10.44 | 9.87 | ~ | 918 | 2 | ||
5 | M 100 | AGN | 12 22 54.9299993592 | +15 49 20.296257960 | 10.04 | 10.05 | 9.35 | ~ | 1845 | 2 | ||
6 | NAME Virgo Cluster | ClG | 12 26 32.1 | +12 43 24 | ~ | 6643 | 0 | |||||
7 | NGC 4450 | LIN | 12 28 29.5910654016 | +17 05 05.976112020 | 10.90 | 10.08 | ~ | 563 | 2 | |||
8 | NGC 4536 | GiP | 12 34 27.1 | +02 11 18 | 11.14 | 11.16 | 10.55 | 17.393 | ~ | 852 | 3 | |
9 | M 89 | LIN | 12 35 39.80733343 | +12 33 22.8308657 | 11.29 | 10.73 | 9.75 | ~ | 995 | 2 | ||
10 | M 90 | Sy2 | 12 36 49.8009839880 | +13 09 46.523813040 | 10.56 | 10.26 | 9.54 | ~ | 898 | 1 | ||
11 | M 58 | Sy2 | 12 37 43.5 | +11 49 06 | 10.80 | 10.48 | 9.66 | ~ | 1078 | 2 | ||
12 | M 59 | GiG | 12 42 02.2581375168 | +11 38 48.909507756 | 11.0 | ~ | 693 | 0 | ||||
13 | NGC 5713 | GiP | 14 40 11.528 | -00 17 21.16 | 11.88 | 11.84 | 11.20 | ~ | 398 | 2 |
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