2003A&A...401..193D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET18:19:20

2003A&A...401..193D - Astronomy and Astrophysics, volume 401, 193-196 (2003/4-1)

Fractal structure of the Horsehead nebula (B 33).

DATTA S.

Abstract (from CDS):

Analysis of the CCD image of the Horsehead nebula (B 33), taken in the H α (6561Å) using the 2.34m Vainu Bappu Telescope (VBT) at Kavalur, India, is performed to test its fractal structure. Ten sample readings of the box dimension of this image were taken using a fractal analysis software, giving an average value of 1.6965725. The sample dimensions were found to be different from the topological dimension of one. Importantly, the box dimension of B 33 was not found to be significantly different from that of the Julia set (box dimension 1.679594) with c=-0.745429+0.113008i. This provides compelling evidence to show that the structure of the Horsehead nebula is not only fractal, but also that its geometry can be described by the Julia function f(z)=z2+c, where both z and c are complex numbers.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: general

Simbad objects: 8

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Number of rows : 8

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 NAME Ney-Allen Nebula ISM 05 35 17.1 -05 23 18           ~ 26 0
2 NAME Ori Complex Cld 05 35.3 -05 23           ~ 357 0
3 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 334 0
4 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 457 0
5 IC 434 HII 05 41 -02.5           ~ 79 1
6 NAME Flame Nebula HII 05 41 42.7 -01 54 44           ~ 692 1
7 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1213 0
8 LDN 1630 DNe 05 45.5 -00 59           ~ 356 0

    Equat.    Gal    SGal    Ecl

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2021.03.05-18:19:20

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