期刊
ASTRONOMY & ASTROPHYSICS
卷 668, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/202244231
关键词
ISM; abundances; H II regions; Galaxy
资金
- Research Council of Lithuania (LMTLT) [P-LU-PAR-22-7]
- Spanish grant [PID2021-123417OB-I00]
- Spanish Ministerio de Economia y Competitividad [AYA2016-79724-C4-4-P, PID2019-107408GB-C44]
- Junta de Andalucia Excellence Project [P18-FR-2664]
- State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa' award [SEV-2017-0709]
In this paper, the authors test the applicability of empirical R and S calibrations for abundance determinations in IFU spectra. The results show that the R calibration produces more consistent abundance estimations between slit and IFU spectra than the S calibration. It is also found that the same calibration can produce close estimations of the abundances using IFU spectra obtained with different spatial resolution and different spatial samplings.
In this work, we make use of available integral field unit (IFU) spectroscopy and slit spectra of several nearby galaxies. The pre-existing empirical R and S calibrations for abundance determinations are constructed using a sample of H II regions with high-quality slit spectra. In this paper, we test the applicability of those calibrations to the IFU spectra. We estimate the calibration-based abundances obtained using both the IFU and the slit spectroscopy for eight nearby galaxies. The median values of the slit and IFU spectra-based abundances in bins of 0.1 in fractional radius R-g (normalised to the optical radius R-25) of a galaxy are determined and compared. We find that the IFU and the slit spectra-based abundances obtained through the R calibration are close to each other; the mean value of the differences of abundances is 0.005 dex, and the scatter in the differences is 0.037 dex for 38 datapoints. The S calibration can produce systematically underestimated values of the IFU spectra-based abundances at high metallicities (12 + log(O/H) greater than or similar to 8.55); the mean value of the differences is -0.059 dex for 21 datapoints, while at lower metallicities the mean value of the differences is -0.018 dex and the scatter is 0.045 dex for 36 data points. This provides evidence that the R calibration produces more consistent abundance estimations between the slit and the IFU spectra than the S calibration. We find that the same calibration can produce close estimations of the abundances using IFU spectra obtained with different spatial resolution and different spatial samplings. This is in line with the recent finding that the contribution of the diffuse ionised gas to the large-aperture spectra of H II regions has a secondary effect.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据