Hubble Space Telescope Imaging of Globular Clusters in Two Face-on Low Surface Brightness Galaxies Ugc 5981 and Ugc 6614

Kim, Ji Hoon

doi:10.5303/jkas.2011.44.5.151

Cited by 2 publications

(1 citation statement)

References 47 publications

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“…This could imply that there were not a lot of major merger events in the history of most gLSBGs and their baryonic masses were accumulated by some other processes. The study of globular clusters in UGC 6614 using deep HST images also provides evidences that the galaxy accumulated its stellar mass through sporadic star formation activity and its star formation history lacks dominant starburst events which could be induced by major mergers Kim (2011).…”

Section: The Origin Of the Central Regions Of Glsbgsmentioning

confidence: 98%

Observational insights on the origin of giant low surface brightness galaxies

Saburova,

Chilingarian,

Kasparova

et al. 2020

Preprint

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Giant low surface brightness galaxies (gLSBGs) with dynamically cold stellar discs reaching the radius of 130 kpc challenge currently considered galaxy formation mechanisms. We analyse new deep long-slit optical spectroscopic observations, archival optical images and published H and optical spectroscopic data for a sample of seven gLSBGs, for which we performed mass modeling and estimated the parameters of dark matter haloes assuming the Burkert dark matter density profile. Our sample is not homogeneous by morphology, parameters of stellar populations and total mass, however, six of seven galaxies sit on the high-mass extension of the baryonic Tully-Fisher relation. In UGC 1382 we detected a global counter-rotation of the stellar high surface brightness (HSB) disc with respect to the extended LSB disc. In UGC 1922 with signatures of a possible merger, the gas counter-rotation is seen in the inner disc. Six galaxies host active galactic nuclei, three of which have the estimated black hole masses substantially below those expected for their (pseudo-)bulge properties suggesting poor merger histories. Overall, the morphology, internal dynamics, and low star formation efficiency in the outer discs indicate that the three formation scenarios shape gLSBGs: (i) a two-stage formation when an HSB galaxy is formed first and then grows an LSB disc by accreting gas from an external supply; (ii) an unusual shallow and extended dark matter halo; (iii) a major merger with fine-tuned orbital parameters and morphologies of the merging galaxies.

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Section: The Origin Of the Central Regions Of Glsbgsmentioning

confidence: 98%

Observational insights on the origin of giant low surface brightness galaxies

Saburova,

Chilingarian,

Kasparova

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

Observational insights on the origin of giant low surface brightness galaxies

Saburova

Chilingarian

Kasparova

et al. 2021

Monthly Notices of the Royal Astronomical Society

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Giant low surface brightness galaxies (gLSBGs) with dynamically cold stellar discs reaching the radius of 130 kpc challenge currently considered galaxy formation mechanisms. We analyse new deep long-slit optical spectroscopic observations, archival optical images and published H i and optical spectroscopic data for a sample of seven gLSBGs, for which we performed mass modeling and estimated the parameters of dark matter haloes assuming the Burkert dark matter density profile. Our sample is not homogeneous by morphology, parameters of stellar populations and total mass, however, six of seven galaxies sit on the high-mass extension of the baryonic Tully–Fisher relation. In UGC 1382 we detected a global counter-rotation of the stellar high surface brightness (HSB) disc with respect to the extended LSB disc. In UGC 1922 with signatures of a possible merger, the gas counter-rotation is seen in the inner disc. Six galaxies host active galactic nuclei, three of which have the estimated black hole masses substantially below those expected for their (pseudo-)bulge properties suggesting poor merger histories. Overall, the morphology, internal dynamics, and low star formation efficiency in the outer discs indicate that the three formation scenarios shape gLSBGs: (i) a two-stage formation when an HSB galaxy is formed first and then grows an LSB disc by accreting gas from an external supply; (ii) an unusual shallow and extended dark matter halo; (iii) a major merger with fine-tuned orbital parameters and morphologies of the merging galaxies.

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Hubble Space Telescope Imaging of Globular Clusters in Two Face-on Low Surface Brightness Galaxies Ugc 5981 and Ugc 6614

Cited by 2 publications

References 47 publications

Observational insights on the origin of giant low surface brightness galaxies

Observational insights on the origin of giant low surface brightness galaxies

Observational insights on the origin of giant low surface brightness galaxies

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