Fractality in Star Formation Regions

Caicedo-Ortiz, H.E.; Castañeda, H.O.; Santiago-Cortés, E.

Acessibilidade / Reportar erro

Brasil

Revista Brasileira de Ensino de Física

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Articles • Rev. Bras. Ensino Fís. 39 (3) • 2017 • https://doi.org/10.1590/1806-9126-RBEF-2017-0006 copy

Fractality in Star Formation Regions

Authorship SCIMAGO INSTITUTIONS RANKINGS

This paper calculates the Hausdorff-Besicovitch dimension or fractal dimension of two astronomical objects using the box counting method. Images were obtained with the Hubble Space Telescope from the regions of star formation known as Hubble V and Hubble X, located in the NGC 6822 galaxy. The fractal dimension values for these H II giant regions are compared to the results of other astronomical objects from the same species that are reported in the literature. A new scheme for classification of the giant H II regions is proposed based on this property.

Keywords:
Fractal dimension; giant HII regions; Hubble V; Hubble X; NGC 6822

Ajuste	Hubble V			Hubble X
Ajuste	$D_{B}$	$r^{2}$	$σ_{e s t}$	$D_{B}$	$r^{2}$	$σ_{e s t}$
1	$1, 36 \pm 0, 02$	$0, 9758$	$0, 2078$	$1, 44 \pm 0, 01$	$0, 9967$	$0, 0597$
2	$1, 35 \pm 0, 02$	$0, 9741$	$0, 2144$	$1, 45 \pm 0, 01$	$0, 9971$	$0, 0569$
3	$1, 35 \pm 0, 02$	$0, 9756$	$0, 2074$	$1, 46 \pm 0, 01$	$0, 9978$	$0, 0496$
4	$1, 35 \pm 0, 02$	$0, 9744$	$0, 2135$	$1, 43 \pm 0, 01$	$0, 9968$	$0, 0586$
5	$1, 30 \pm 0, 02$	$0, 9796$	$0, 1820$	$1, 39 \pm 0, 01$	$0, 9954$	$0, 0690$
6	$1, 29 \pm 0, 02$	$0, 9780$	$0, 1889$	$1, 39 \pm 0, 01$	$0, 9950$	$0, 0717$
7	$1, 29 \pm 0, 02$	$0, 9771$	$0, 1916$	$1, 39 \pm 0, 01$	$0, 9950$	$0, 0713$
8	$1, 29 \pm 0, 02$	$0, 9795$	$0, 1809$	$1, 39 \pm 0, 01$	$0, 9949$	$0, 0715$
9	$1, 29 \pm 0, 02$	$0, 9757$	$0, 1984$	$1, 39 \pm 0, 01$	$0, 9947$	$0, 0734$
10	$1, 30 \pm 0, 02$	$0, 9778$	$0, 1902$	$1, 39 \pm 0, 01$	$0, 9951$	$0, 0714$
11	$1, 29 \pm 0, 02$	$0, 9794$	$0, 1817$	$1, 40 \pm 0, 01$	$0, 9952$	$0, 0703$
12	$1, 28 \pm 0, 02$	$0, 9794$	$0, 1807$	$1, 39 \pm 0, 01$	$0, 9947$	$0, 0737$
$D_{B_{P r o m}}$	$1, 31 \pm 0, 04$			$1, 41 \pm 0, 03$

Objeto Astronómico	$D_{B}$	Referencia
Remanente de la Supernova de Vela	$1, 2 \pm 0, 05$	[⁴⁶[46] S. Blacher, J. Perdang, Vistas in Astronomy 33, 393 (1990).]
Nebulosa de Eta Carinae	$1, 37 \pm 0, 02$	[⁴⁶[46] S. Blacher, J. Perdang, Vistas in Astronomy 33, 393 (1990).]
Región HII Gigante Hubble V	$1, 31 \pm 0, 04$	[e]
Región HII GiganteHubble X	$1, 41 \pm 0, 03$	[e]
Nebulosa Cabeza de Caballo	1,6965725	[⁴⁷[47] S. Datta, arXiv:astro-ph/0105036 (2001).]
Paley I	1,677181	[⁴⁷[47] S. Datta, arXiv:astro-ph/0105036 (2001).]
Nebulosa Rosette	1,78261	[⁴⁷[47] S. Datta, arXiv:astro-ph/0105036 (2001).]
Nebulosa del Aguila	1,669622	[⁴⁷[47] S. Datta, arXiv:astro-ph/0105036 (2001).]
IC434 (col I)	1,811718	[⁴⁸[48] S. Datta, A&A 401, 193 (2003).]
Nebulosa de la Hélice (NGC 7293)	1,841059	[⁵⁰[50] S. Datta, in Planetary Nebulae: Their Evolution and Role in the Universe, edited by S. Kwok, M. Dopita, R. Sutherland (Astronomical Society of the Pacific, 2003), v. 209, p. 523.]

Sociedade Brasileira de Física Caixa Postal 66328, 05389-970 São Paulo SP - Brazil - São Paulo - SP - Brazil
E-mail: marcio@sbfisica.org.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] * Endereço de correspondência: hernando.caicedo@uniautonoma.edu.co.