An H
                    <i>α</i>
                    Imaging Survey of the Low-surface-brightness Galaxies Selected from the Fall Sky Region of the 40% ALFALFA H i Survey

Lei, Fulin; Wu, Hong; Zhu, Yongchun; Lam, Man I; Zhang, Zhimin; He, Min; Jin, Jia; Cao, Tianwen; Zhao, P.; Yang, Fan; Wu, Chao-Jian; Li, Hongbin; Ren, Juanjuan

doi:10.3847/1538-4365/aaa7ec

Cited by 17 publications

(51 citation statements)

References 67 publications

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“…We update the process of data reduction, especially continuum subtraction. We present a catalog of the Hα fluxes and derived parameters of 357 spring LSBGs and 111 fall LSBGs in Lei et al (2018) with new continuum subtraction.…”

Section: Discussionmentioning

confidence: 99%

“…Given the color of target galaxy (red solid circle), the WNCR can be derived from the fitting. and adopt the best WNCR value when the residual of fluxes of most field stars reaches a minimum (Kennicutt et al 2008;Lei et al 2018). However, this does not take the color effect (Spector et al 2012;Gavazzi et al 2018) into account.…”

Section: Continuum Subtractionmentioning

confidence: 99%

“…The FWHM is the full width at half maximum of the Hα filters. The transmission curve T (λ) and FWHM of each Hα filter can be found in Lei et al (2018). The corrected Hα flux is obtained after divided by the normalized transmission T(Hα).…”

Section: Flux Correctionmentioning

confidence: 99%

“…Based on Du2015, we observed 468 Hα images of LSBGs. Lei et al (2018) presented the first results of 111 LSBGs in the fall sky region of Du2015, which are shown as the blue squares. Due to the limited observation time, the observation of the spring sky re-gion of Du2015 is not finished.…”

Section: Introductionmentioning

confidence: 99%

“…We only use filters of Hα1-7. More detailed information about filters can be found in Lei et al (2018).…”

Section: Introductionmentioning

confidence: 99%

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An Hα Imaging Survey of the Low Surface Brightness Galaxies Selected from the Spring Sky Region of the 40% ALFALFA H i Survey

Lei

Zhu

et al. 2019

ApJS

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We present a narrow Hα-band imaging survey of 357 low surface brightness galaxies (LSBGs) that are selected from the spring sky region of the 40% Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) HI Survey. All the Hα images are obtained from the 2.16 m telescope, operated by Xinglong Observatory of the National Astronomical Observatories, Chinese Academy of Sciences. We provide the Hα fluxes and derive the global star formation rates (SFRs) of LSBGs after the Galactic extinction, internal extinction, and [NII] contamination correction. Comparing to normal star-forming galaxies, LSBGs have a similar distribution in the HI surface density (Σ HI ), but their SFRs and star formation surface density (Σ SFR ) are much lower. Our results show that the gas-rich LSBGs selected from the ALFALFA survey obviously deviate from the Kennicutt-Schmidt law, in the relation between the star formation surface density (Σ SFR ) and the gas surface density (Σ gas ). However, they follow the extended Schmidt law well when taking the stellar mass of the galaxy into consideration.

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Section: Discussionmentioning

confidence: 99%

Section: Continuum Subtractionmentioning

confidence: 99%

Section: Flux Correctionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…We only use filters of Hα1-7. More detailed information about filters can be found in Lei et al (2018).…”

Section: Introductionmentioning

confidence: 99%

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An Hα Imaging Survey of the Low Surface Brightness Galaxies Selected from the Spring Sky Region of the 40% ALFALFA H i Survey

Lei

Zhu

et al. 2019

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Star Formation in Low Surface Brightness Galaxies

Lei¹

2019

PASP

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Examining the Influence of the Regions on Star Formation Surface Density

Lei,

2023

PASP

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We analyzed the star formation surface density (ΣSFR) between the global and H ii regions in a sample of 69 low surface brightness galaxies (LSBGs) and 68 star-forming (SF) galaxies using data from the Hα images. The conventional global ΣSFR, which is defined as the star formation rate (SFR) divided by the area of the global galaxy, may not accurately describe the star formation activity in LSBGs due to the lower number of H ii regions compared to SF galaxies. To address this, we divide the global galaxy into two regions, the H ii region and the diffuse region, and then study the ΣSFR in each region. Our results show that both the SFR and area of the H ii regions in LSBGs are lower than those in SF galaxies, resulting in the H ii region’s ΣSFR (SFR/area) being slightly lower in LSBGs than in SF galaxies by 0.28 dex, although the global ΣSFR is at least an order of magnitude lower in LSBGs than in SF galaxies. Furthermore, a significant difference exists between the global and H ii regions in ΣSFR. In LSBGs, ΣSFR increased by 0.80 dex from the global region to the H ii region, while SF galaxies demonstrate a 0.54 dex increase, highlighting the crucial aspect of carefully selecting an appropriate aperture for ΣSFR calculations.

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An H α Imaging Survey of the Low-surface-brightness Galaxies Selected from the Fall Sky Region of the 40% ALFALFA H i Survey

Cited by 17 publications

References 67 publications

An Hα Imaging Survey of the Low Surface Brightness Galaxies Selected from the Spring Sky Region of the 40% ALFALFA H i Survey

An Hα Imaging Survey of the Low Surface Brightness Galaxies Selected from the Spring Sky Region of the 40% ALFALFA H i Survey

Star Formation in Low Surface Brightness Galaxies

Examining the Influence of the Regions on Star Formation Surface Density

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