A concise reference to (projected) Sersic R1/n quantities, including concentration, profile slopes, petrosian indices, and Kron magnitudes

被引:509
作者
Graham, AW [1 ]
Driver, SP [1 ]
机构
[1] Australian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, Australia
来源
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA | 2005年 / 22卷 / 02期
关键词
galaxies : structure; galaxies : fundamental parameters; methods : analytical; methods : data analysis;
D O I
10.1071/AS05001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Given the growing use of Sersic's (1963, 1968) R-1/n model for describing the stellar distributions in galaxies, and the lack of any single reference that provides the various associated mathematical expressions, we have endeavoured to compile such a resource here. We present the standard intensity profile, and its various guises such as the luminosity, surface-brightness, and aperture-magnitude profile. Expressions to transform the effective surface brightness into the mean effective and central surface brightness are also given, as is the expression to transform between effective radii and exponential scale-lengths. We additionally provide expressions for deriving the 'concentration' of an R-1/n profile, and two useful equations for the logarithmic slope of the light-profile are given. Petrosian radii and fluxes are also derived for a range of Sersic profiles and compared with the effective radii and total flux. Similarly, expressions to obtain Kron radii and fluxes are presented as a function of the Sersic index n and the number of effective radii sampled. Illustrative figures are provided throughout. Finally, the core-Sersic model, consisting of an inner power-law and an outer Sersic function, is presented.
引用
收藏
页码:118 / 127
页数:10
相关论文
共 108 条
[61]   The distribution of galactic inclinations - A clue to opacity? [J].
Jones, H ;
Davies, JI ;
Trewhella, M .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 283 (01) :316-324
[62]   CCD and HI observations of LSB dwarf galaxies in the general field [J].
Karachentseva, VE ;
Prugniel, P ;
Vennik, J ;
Richter, GM ;
Thuan, TX ;
Martin, JM .
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1996, 117 (02) :343-368
[63]   THE STAR FORMATION LAW IN GALACTIC DISKS [J].
KENNICUTT, RC .
ASTROPHYSICAL JOURNAL, 1989, 344 (02) :685-703
[64]   Correlations among global photometric properties of disk galaxies [J].
Khosroshahi, HG ;
Wadadekar, Y ;
Kembhavi, A .
ASTROPHYSICAL JOURNAL, 2000, 533 (01) :162-171
[65]   THE FUNDAMENTAL PLANE AND THE SURFACE BRIGHTNESS TEST FOR THE EXPANSION OF THE UNIVERSE [J].
KJAERGAARD, P ;
JORGENSEN, I ;
MOLES, M .
ASTROPHYSICAL JOURNAL, 1993, 418 (02) :617-625
[66]   A photometric method for quantifying asymmetries in disk galaxies [J].
Kornreich, DA ;
Haynes, MP ;
Lovelace, RVE .
ASTRONOMICAL JOURNAL, 1998, 116 (05) :2154-2165
[67]   Radial truncations in stellar discs in galaxies [J].
Kregel, M ;
van der Kruit, PC .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 355 (01) :143-146
[68]   PHOTOMETRY OF A COMPLETE SAMPLE OF FAINT GALAXIES [J].
KRON, RG .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1980, 43 (02) :305-325
[69]   Structure of disk-dominated galaxies. I. Bulge/disk parameters, simulations, and secular evolution [J].
MacArthur, LA ;
Courteau, S ;
Holtzman, JA .
ASTROPHYSICAL JOURNAL, 2003, 582 (02) :689-722
[70]   Quantitative morphology of galaxies in the Hubble deep field [J].
Marleau, FR ;
Simard, L .
ASTROPHYSICAL JOURNAL, 1998, 507 (02) :585-600