The Eighty Six H
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             Spectra from the Orion Nebula (M42, Sh2-281) with DEFPOS

Şahan, Muhittin; Yeğingil, I.

doi:10.1007/s12036-017-9486-1

Cited by 3 publications

(4 citation statements)

References 36 publications

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“…Andor iKon-L 936 camera, which has active pixel arrays with pixel size of 13.5 µ m and has more than 90% QE at Hα , was used to obtain the ring image from Fabry-Pérot etalons. Data including the intensities, FWHM, and LSR velocities of Hα emission from the selected eight ionized hydrogen sources were acquired on [25][26][27] December 2015 and 6-7 June 2017. Results were listed in Table 2 and in Figure 1 and then were compared with previous works [33][34][35][37][38][39] (see Section 3).…”

Section: Discussionmentioning

confidence: 99%

“…A) spectral window. The spectrometer, located in the coudé exit of the 150 cm RTT150 telescope (f/48 ) at the TÜBİTAK National Observatory (TUG, Antalya, Turkey) in 2007, has obtained many galactic Hα emission lines from the DIG [20,21,25,26]. The DEFPOS system consists of a 7.5 cm dual etalon, a narrow band Hα filter (FWHM 15Å), and a 2048 × 2048 CCD camera with pixel size of 13.5 µ m. The CCD camera has more than 90% quantum efficiency (QE) at Hα .…”

Section: Observations and Data Analysis Of The Spectrometermentioning

confidence: 99%

“…The spectrometer has a field of view of 4' and resolving power of 11,000 (30 km/s: FWHM of the instrumental response function). Detailed information about the design of DEFPOS, the intensity calibration, and the data reduction procedure can be found in [21,25,26] .…”

Section: Observations and Data Analysis Of The Spectrometermentioning

confidence: 99%

“…The eight H II regions, which are bright sources in the Milky Way, were selected to achieve an adequately high S/N ratio. The observations of north galactic Hα emission were carried out with DEFPOS on [25][26][27] December 2015 and on 6-7 June 2017 at the TUG RTT150 telescope with different long exposure times ranging from 900 s to 3600 s. During the analysis of the DEFPOS data, the standard CCD data reduction technique including bias, dark, and flat field corrections was used for each individual CCD image and then cosmic rays and unwanted reflections due to the optical system were removed from galactic data. Tracking correction was not used during the observations.…”

Section: Observations and Data Analysis Of The Spectrometermentioning

confidence: 99%

See 3 more Smart Citations

Galactic Hα emission line studies using DEFPOS at the TÜBİTAK National Observatory

2018

Turk J Phys

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H α spectral line (6563Å) profiles of eight northern H II regions in our galaxy (Sh2-25, Sh2-131, Sh2-237, IC 434, IC 1318, NGC 1982, NGC 6543, and NGC 6611) have been obtained using the Dual Etalon Fabry-Pérot Optical spectrometer (DEFPOS) with a 4' field of view, located at the coudé focus of the 150 cm RTT150 telescope at the TÜBİTAK National Observatory (TUG, Antalya, Turkey). Observations were carried out during the nights of 25-27December 2015 and 6-7 June 2017 with different long exposure times ranging from 900 s to 3600 s. These spectra provide information about the local standard of rest (LSR) velocities, the full width at half maximum (FWHM), and densities of the sources. The LSR velocities and the FWHM of the H α emission lines were found to be in the range of -50.31 km/s to 27.57 km/s and 34.88 km/s to 44.54 km/s (mean FWHM: 37.19 km/s), respectively. The NGC 6543 (Cat's Eye Nebula) is the faintest one (75.06 R), while the NGC 1982 H II region is brightest source (38,477.3 R). The LSR velocity and the FWHM results of the DEFPOS/RTT150 system were compared with the data by several authors given in the literature and the results of DEFPOS data were found to be in good agreement with data given in the literature. Since there is not enough information on LSR velocities and intensities of such galactic sources with low angular size in the literature, we believe that this spectrometer will provide a powerful tool for the study of diffuse ionized gas and these new results may have significant contributions to the literature. In the future, we are planning to prepare H α maps with the 4' field of view of some diffuse ionized emission sources selected from VTSS and WHAM H α maps with large fields of view.

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Section: Discussionmentioning

confidence: 99%

Section: Observations and Data Analysis Of The Spectrometermentioning

confidence: 99%

Section: Observations and Data Analysis Of The Spectrometermentioning

confidence: 99%

Section: Observations and Data Analysis Of The Spectrometermentioning

confidence: 99%

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Galactic Hα emission line studies using DEFPOS at the TÜBİTAK National Observatory

2018

Turk J Phys

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Yıldızlararası Ortamdaki On Farklı HII Bölgesinden Seçilen Hα Tayf Sonuçları

Şahan¹,

Tiraş²,

Bolat³

2018

Süleyman Demirel Üniversitesi Fen Edebiyat Fakültesi Fen Dergisi

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In this study, we give the results of the H spectra obtained from ten different ionized hydrogen sources (Sh2-108, Sh2-119, Sh2-136, Sh2-206, Sh2-228, IC5146, IC444, NGC6572, NGC6960, and NGC7380) in our galaxy using DEFPOS spectrometer. The H spectra provide detailed information about some physical conditions (such as the intensities, the LSR velocities, and the line widths) of the ionized gas in interstellar medium. From these spectra, velocities with respect to the LSR and intensities of the sources were found to be 28.

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Investigation of NGC 7822 (Sh2-171) HII Region Using WHAM Hα Data

Şahan

2023

Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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The Eighty Six H $$\alpha $$ α Spectra from the Orion Nebula (M42, Sh2-281) with DEFPOS

Cited by 3 publications

References 36 publications

Galactic Hα emission line studies using DEFPOS at the TÜBİTAK National Observatory

Galactic Hα emission line studies using DEFPOS at the TÜBİTAK National Observatory

Yıldızlararası Ortamdaki On Farklı HII Bölgesinden Seçilen Hα Tayf Sonuçları

Investigation of NGC 7822 (Sh2-171) HII Region Using WHAM Hα Data

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