Studies of turbulence in gaseous nebulae

Héctor O. Castañeda; Oriol Fuentes-Masip; Amina Helmi

Studies of turbulence in gaseous nebulae

Héctor O. Castañeda, Oriol Fuentes-Masip, Amina Helmi

Research output: Contribution to journal › Conference article › peer-review

Abstract

We discuss in this work the evidence for the existence of hydrodynamical turbulence in gaseous nebulae. The methods for the statistical analysis of the velocity fields are presented, and the results available in the literature are discussed. As an example, we present an analysis of the velocity field of the giant H II region NGC 595, using the structure function. The radial velocity data were obtained using TAURUS-2, a Fabry-Perot imaging spectrograph at the Observatorio del Roque de los Muchachos. We find that there is a correlation between the mean quadratic differences of radial velocities and distance over the surface of the nebula at small scales. The standard Kolmogorov model for turbulence is examined and compared with the observations.

Original language	English
Pages (from-to)	259-262
Number of pages	4
Journal	Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias
Volume	3
State	Published - 1995
Externally published	Yes
Event	5th Mexico-Texas Conference on Astrophysics: Gaseous Nebulae and Star Formation - Tequesquitengo, Mor, Mexico Duration: 3 Apr 1995 → 5 Apr 1995

Keywords

H II regions
Turbulence

Cite this

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title = "Studies of turbulence in gaseous nebulae",

abstract = "We discuss in this work the evidence for the existence of hydrodynamical turbulence in gaseous nebulae. The methods for the statistical analysis of the velocity fields are presented, and the results available in the literature are discussed. As an example, we present an analysis of the velocity field of the giant H II region NGC 595, using the structure function. The radial velocity data were obtained using TAURUS-2, a Fabry-Perot imaging spectrograph at the Observatorio del Roque de los Muchachos. We find that there is a correlation between the mean quadratic differences of radial velocities and distance over the surface of the nebula at small scales. The standard Kolmogorov model for turbulence is examined and compared with the observations.",

keywords = "H II regions, Turbulence",

author = "Casta{\~n}eda, {H{\'e}ctor O.} and Oriol Fuentes-Masip and Amina Helmi",

year = "1995",

language = "Ingl{\'e}s",

volume = "3",

pages = "259--262",

journal = "Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias",

issn = "1405-2059",

note = "5th Mexico-Texas Conference on Astrophysics: Gaseous Nebulae and Star Formation ; Conference date: 03-04-1995 Through 05-04-1995",

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TY - JOUR

T1 - Studies of turbulence in gaseous nebulae

AU - Castañeda, Héctor O.

AU - Fuentes-Masip, Oriol

AU - Helmi, Amina

PY - 1995

Y1 - 1995

N2 - We discuss in this work the evidence for the existence of hydrodynamical turbulence in gaseous nebulae. The methods for the statistical analysis of the velocity fields are presented, and the results available in the literature are discussed. As an example, we present an analysis of the velocity field of the giant H II region NGC 595, using the structure function. The radial velocity data were obtained using TAURUS-2, a Fabry-Perot imaging spectrograph at the Observatorio del Roque de los Muchachos. We find that there is a correlation between the mean quadratic differences of radial velocities and distance over the surface of the nebula at small scales. The standard Kolmogorov model for turbulence is examined and compared with the observations.

AB - We discuss in this work the evidence for the existence of hydrodynamical turbulence in gaseous nebulae. The methods for the statistical analysis of the velocity fields are presented, and the results available in the literature are discussed. As an example, we present an analysis of the velocity field of the giant H II region NGC 595, using the structure function. The radial velocity data were obtained using TAURUS-2, a Fabry-Perot imaging spectrograph at the Observatorio del Roque de los Muchachos. We find that there is a correlation between the mean quadratic differences of radial velocities and distance over the surface of the nebula at small scales. The standard Kolmogorov model for turbulence is examined and compared with the observations.

KW - H II regions

KW - Turbulence

UR - http://www.scopus.com/inward/record.url?scp=70749105785&partnerID=8YFLogxK

M3 - Artículo de la conferencia

AN - SCOPUS:70749105785

SN - 1405-2059

VL - 3

SP - 259

EP - 262

JO - Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

JF - Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

T2 - 5th Mexico-Texas Conference on Astrophysics: Gaseous Nebulae and Star Formation

Y2 - 3 April 1995 through 5 April 1995

ER -

Studies of turbulence in gaseous nebulae

Abstract

Keywords

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