The gas emission spectrum in a star-forming region in the BCD galaxy VII Zw 403 (UGC 6456)

Архипова, В. П.; Lozinskaya, T. A.; Моисеев, А. В.; Egorov, Oleg V.

doi:10.1134/s1063772907110017

Cited by 6 publications

(18 citation statements)

References 24 publications

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“…To refine the metallicity in HII regions of the galaxy we used the line intensities, previously measured in [3], as well as the data adopted from Lynds et al [5].…”

Section: Resultsmentioning

confidence: 99%

“…This paper continues a series of our investigations of ionized gas complexes, associated with the latest burst of star formation in the BCD galaxy VII Zw 403 (UGC 6456), presented by Arkhipova et al [3] and Lozinskaya et al [4].…”

Section: Introductionmentioning

confidence: 99%

“…Both series of observations, carried out in 2003 and 2004 are described in detail in our paper [3], we shall only briefly summarize the basic data here.…”

Section: Spectral Observationsmentioning

confidence: 99%

“…In this paper we refine the abundances of oxygen, nitrogen and sulfur in certain HII regions from the results of previous observations of VII Zw 403 with the 6-m BTA telescope of the Special Astrophysical Observatory of Russian Academy of Sciences (SAO RAS) [3,4]. Based on the archive data of the Spitzer Space Telescope we investigate the infrared emission of the galaxy with the aim to analyze the distribution of the PAHs and find a possible correlation of q PAH with the radiation brightness of the ionized and neutral gas, as well as with the metallicity of HII regions.…”

mentioning

confidence: 99%

“…In [3], based on the observations of VII Zw 403 at the 6-m BTA telescope of the SAO RAS with the panoramic Multipupil Fiber Spectrograph (MPFS) and with the SCORPIO focal reducer in the slit spectrograph mode, we have analyzed the gas emis-sion spectrum and determined the relative oxygen abundance in the regions № 1, 3, 4, and the nitrogen and sulfur abundances in all regions. To our knowledge, these estimates of metallicity in individual regions of ionized gas in VII Zw 403 were the first, all the previously published values are averaged across the galaxy.…”

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confidence: 99%

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Gas and dust in the BCD galaxy VII Zw 403 (UGC 6456)

Egorov

Lozinskaya

2011

Astrophys. Bull.

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Based on the results of the earlier spectroscopic observations with the 6-m BTA telescope of the SAO RAS we refine the metallicity estimates of the complexes of ionized gas in the VII Zw 403 galaxy. Infrared observations from the Spitzer Space Telescope are used to search for a possible correlation of the mass fraction distribution of the polycyclic aromatic hydrocarbons (PAH) with the distribution of ionized and neutral hydrogen, and with the metallicity of gas in the HII regions of the galaxy.

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“…To refine the metallicity in HII regions of the galaxy we used the line intensities, previously measured in [3], as well as the data adopted from Lynds et al [5].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Both series of observations, carried out in 2003 and 2004 are described in detail in our paper [3], we shall only briefly summarize the basic data here.…”

Section: Spectral Observationsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Gas and dust in the BCD galaxy VII Zw 403 (UGC 6456)

Egorov

Lozinskaya

2011

Astrophys. Bull.

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Star formation in the nearby dwarf galaxy DDO 53: interplay between gas accretion and stellar feedback

Egorov

Lozinskaya

Vasiliev

et al. 2021

Monthly Notices of the Royal Astronomical Society

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We present the results of a multiwavelength study of the nearby dwarf galaxy DDO 53 – a relatively isolated member of the M 81 group. We analyse the atomic and ionised gas kinematics (based on the observations with Fabry-Perot interferometer in Hα line and archival data in H i 21 cm line), distribution, excitation and oxygen abundance of the ionised gas (based on the long-slit and integral-field spectroscopy and on imaging with narrow-band filters), and their relation with the young massive stars (based on archival HST data). We detect a faint 2-kpc sized supershell of ionised gas surrounding the galaxy. Most probably, this structure represents a large-scale gas outflow, however it could be also created by the ionising quanta leaking from star-forming regions to the marginally detected atomic hydrogen surrounding the galactic disc. We analyse the properties of the anomalous H i in the north part of the galaxy and find that its peculiar kinematics is also traced by ionised gas. We argue that this H i feature is related to the accreting gas cloud captured from the intergalactic medium or remaining after the merger event occurred >1 Gyr ago. The infalling gas produces shocks in the interstellar medium and could support the star formation activity in the brightest region in DDO 53.

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Emission spectrum of ionized gas in the irregular galaxy Holmberg II

Egorov¹,

Lozinskaya²,

Моисеев³

2012

Monthly Notices of the Royal Astronomical Society

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We study the ionized gas spectrum of star forming regions in the Holmberg II galaxy using the optical long-slit spectroscopic observations made at the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS). We estimate the oxygen, nitrogen, sulphur, neon, and argon abundances in individual H ii regions and find the average metallicity in the galaxy to be Z ≃ 0.1 or 0.3 Z ⊙ depending on the estimation method employed. We use these observations combined with the results of our earlier studies of the Irr galaxy IC 10 and BCD galaxy VII Zw 403 to compare the currently most popular methods of gas metallicity estimation in order to select among them the techniques that are most reliable for analysing Irr galaxies. To this end, we use the 'direct' T e method and six empirical and theoretical methods. The results of our observations mostly confirm the conclusions of López-Sánchez et al. (2012) based on the analysis of systematic deviations of metallicity estimates derived by applying different methods to 'model' H ii regions.

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The gas emission spectrum in a star-forming region in the BCD galaxy VII Zw 403 (UGC 6456)

Abstract: We have determined the parameters of the gas in bright ionized supershells, and estimated the relative abundances of oxygen, nitrogen, and sulfur; a low relative N/O abundance was detected.

Cited by 6 publications

References 24 publications

Gas and dust in the BCD galaxy VII Zw 403 (UGC 6456)

Gas and dust in the BCD galaxy VII Zw 403 (UGC 6456)

Star formation in the nearby dwarf galaxy DDO 53: interplay between gas accretion and stellar feedback

Emission spectrum of ionized gas in the irregular galaxy Holmberg II

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