2019A&A...629A..12M


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET12:15:21

2019A&A...629A..12M - Astronomy and Astrophysics, volume 629A, 12-12 (2019/9-1)

Properties of extragalactic thick discs recovered from ultra-deep Stripe82 imaging.

MARTINEZ-LOMBILLA C. and KNAPEN J.H.

Abstract (from CDS):


Context. Thick discs can give invaluable information on the formation and evolution history of galaxies as most, if not all, disc galaxies have a thin (classical) disc and a thick disc.
Aims. We study the structure of thick discs in extraordinary depth by reaching a surface brightness limit of µrdeep∼28.5-29mag/arcsec2 with combined g, r, i band images from the IAC Stripe 82 Legacy Project.
Methods. We present the characterisation of the thick discs in a sample of five edge-on galaxies. A study of the radial and vertical surface brightness profiles is presented by comparing our data with point spread function (PSF) deconvolved models. Our method begins with an analysis of the background and masking processes. Then we consider the effects of the PSF through galaxy modelling. The galaxy disc components are fitted considering that the thin and thick discs are two stellar fluids that are gravitationally coupled in hydrostatic equilibrium.
Results. We find that effects due to the PSF are significant when low surface brightness is reached, especially in the vertical profiles, but it can be accounted for by careful modelling. The galaxy outskirts are strongly affected by the faint wings of the PSF, mainly by PSF-redistributed light from the thin disc. This is a central problem for ultra-deep imaging. The thick-disc component is required to reach satisfactory fit results in the more complex galaxies in our sample, although it is not required for all galaxies. When the PSF is ignored, the brightness of these structures may be overestimated by up to a factor of ∼4.
Conclusions. In general, our results are in good agreement with those of previous works, although we reach deeper surface brightness levels, so that the PSF effects are stronger. We obtain scale heights and mass ratios of thin and thick discs (zt, zT, and MT/Mt), which provide excellent agreement with previous studies. Our small initial sample provides evidence for aspects of a wide variety of formation theories for the thick discs in disc galaxies.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: formation - galaxies: evolution - galaxies: structure - methods: observational - methods: data analysis - techniques: image processing

Simbad objects: 58

goto Full paper

goto View the reference in ADS

Number of rows : 58

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 UGC 507 GiC 00 49 35.683 +01 06 55.72   14.99       ~ 50 1
2 2MASX J00555593+0039403 GiC 00 55 55.935 +00 39 40.37           ~ 6 0
3 UGC 651 GiC 01 03 38.822 -00 29 27.39   16.0       ~ 14 0
4 2MFGC 773 H2G 01 04 41.546 -00 57 21.58   15.83   14.66   ~ 15 0
5 UGC 734 GiC 01 10 38.249 -00 16 41.30   15.6       ~ 21 0
6 NGC 429 GiG 01 12 57.424 -00 20 41.94   14.4       ~ 48 0
7 UGC 847 LSB 01 19 04.472 -00 08 19.08   16.5       ~ 32 0
8 UGC 866 GiC 01 20 06.803 -00 12 19.61   15.5   14.97 15.0 ~ 36 0
9 Mrk 1153 GiC 01 23 14.61 -00 42 02.3   15.7       ~ 35 0
10 UGC 961 GiC 01 24 38.090 -00 03 46.45   16.0       ~ 11 0
11 Mrk 359 Sy1 01 27 32.5219447154 +19 10 43.837247537   14.89 14.22     ~ 277 0
12 UGC 1040 GiG 01 27 35.9007666402 -01 06 18.376227550   14.85       ~ 39 1
13 NGC 585 LIN 01 31 42.103 -00 55 58.46   14.4       ~ 60 0
14 UGC 1116 GiG 01 33 34.545 -01 05 25.94   15.2       ~ 31 0
15 UGC 1120 GiG 01 34 02.425 -01 04 32.95   14.9       ~ 49 0
16 UGC 1123 LIN 01 34 07.9715903104 -01 01 56.249006326   14.4       ~ 50 0
17 UGC 1296 GiC 01 50 07.095 -00 44 24.81   15.5       ~ 19 0
18 IC 1756 EmG 01 57 05.249 -00 28 05.30   15.5       ~ 35 0
19 UGC 1588 EmG 02 05 40.315 -00 41 41.50   15.7       ~ 28 0
20 UGC 1839 G 02 22 30.151 -00 37 01.33   16.10   14.43 14.7 ~ 46 0
21 UGC 1911 G 02 26 36.599 +00 38 55.50   16.5       ~ 20 0
22 UGC 1934 G 02 27 51.435 +00 30 05.66   15.5       ~ 40 0
23 UGC 1939 GiG 02 28 17.5927621243 +26 18 44.807326122   14.9       ~ 24 0
24 NGC 955 GiG 02 30 33.1425182039 -01 06 30.309616884 13.29 12.93 11.97 13.0 12.4 ~ 90 1
25 NGC 1032 G 02 39 23.6 +01 05 38   13.2       ~ 87 1
26 UGC 2177 LSB 02 42 06.277 -00 53 36.04   16.0       ~ 13 0
27 6dFGS gJ024834.4-005936 GiG 02 48 34.388 -00 59 35.98   16.39   15.27   ~ 12 0
28 UGC 2319 GiG 02 49 53.568 -01 00 13.07   15.6       ~ 32 0
29 UGC 2404 G 02 55 48.875 +01 04 45.12   16.5 16.5     ~ 30 0
30 MCG+00-08-082 G 03 04 36.5647538241 -00 02 14.690088863   15.5       ~ 13 0
31 UGC 2522 LIN 03 04 57.045 +00 13 00.53   16.0       ~ 15 0
32 UGC 2523 G 03 05 09.034 +01 05 36.54   15.3       ~ 33 0
33 MCG+00-09-009 G 03 09 00.646 -00 58 55.77   15   14.89   ~ 10 0
34 UGC 2584 G 03 11 44.750 +01 02 41.27   18       ~ 16 0
35 UGC 2587 GiG 03 11 59.860 -01 09 41.98   16.0       ~ 22 0
36 UGC 2628 GiG 03 16 31.827 -00 28 04.91   14.9       ~ 35 0
37 NVSS J031726-000536 rG 03 17 26.510 -00 05 39.34   15.7       ~ 19 0
38 2MFGC 2756 G 03 21 33.929 -00 10 42.12   16.35   14.99   ~ 13 0
39 UGC 2699 G 03 22 00.979 -01 03 14.15   16.5       ~ 22 0
40 MCG+00-09-079 G 03 24 06.508 -01 03 28.29   15.7       ~ 20 0
41 IC 330 GiP 03 32 08.017 +00 21 12.70   15.0       ~ 20 0
42 2MFGC 2963 G 03 34 44.612 +00 17 50.43   16.12       ~ 11 0
43 UGC 11612 AGN 20 40 52.099 +00 39 10.09   15.52       ~ 49 1
44 UGC 11631 EmG 20 47 59.937 -00 10 48.14   15.0       ~ 23 0
45 UGC 11645 GiG 20 53 24.626 +00 39 07.20   15.5       ~ 24 0
46 2MFGC 15962 G 21 04 51.9627603928 +00 26 52.686502428   15.5       ~ 12 0
47 2MFGC 15979 G 21 06 14.050 +00 05 52.08           ~ 14 0
48 UGC 11724 G 21 20 38.266 +01 02 50.20   15.3       ~ 21 0
49 NVSS J215807+010042 rG 21 58 07.332 +01 00 31.95   15.16   14.0 14.1 ~ 59 1
50 2MFGC 16658 LIN 22 05 27.0077731815 -00 32 00.392442048   16.21   14.66   ~ 20 0
51 UGC 11982 G 22 18 52.962 -01 03 31.21   15.70       ~ 43 0
52 2MFGC 16973 G 22 31 49.797 +00 26 49.57           ~ 6 0
53 UGC 12183 G 22 47 04.196 -00 04 27.28   15.5       ~ 22 0
54 Z 379-29 Sy2 23 05 18.8337081466 +00 11 22.173362487   16.06 15.03     ~ 60 0
55 LEDA 91784 G 23 13 02.99 -01 14 33.8           ~ 9 0
56 NGC 7648 GiG 23 23 54.031 +09 40 02.85   13.5       ~ 72 0
57 MCG+00-60-057 LIN 23 53 49.2480108482 -00 58 28.077736832   15.2       ~ 23 0
58 UGC 12865 Sy2 23 57 43.7284832243 +00 39 18.538557913   17.96 17.24     ~ 22 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2019A&A...629A..12M and select 'bookmark this link' or equivalent in the popup menu


2020.12.03-12:15:21

© Université de Strasbourg/CNRS

    • Contact