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Intrinsic Morphology of The Stellar Components in HI-bearing Dwarf Galaxies and The Dependence on Mass

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arxiv 2409.00944 v1 pith:2HWBNECC submitted 2024-09-02 astro-ph.GA

Yu Rong , Min He , Huijie Hu , Hong-Xin Zhang , Hui-Yuan Wang This is my paper · ORCID
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keywords stellarhi-bearinggalaxiescomponentsdwarfarecibodependencedisks
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abstract

The intrinsic morphology of stellar components within HI-bearing dwarf galaxies remains a topic of uncertainty. Leveraging the galaxy dataset derived from the cross-matched catalog of the Arecibo Legacy Fast Arecibo L-band Feed Array HI 21cm line survey and the Sloan Digital Sky Survey, we employ a Markov Chain Monte Carlo methodology and assume a triaxial model to scrutinize the inherent stellar distributions of these HI-bearing dwarf galaxies. Our analysis indicates a preference for oblate-triaxial models with $C<B\lesssim A$, indicative of thick stellar disks, characterizing the stellar components in these HI-bearing dwarfs with stellar masses ranging between $10^7\--10^{9.5}\ M_{\odot}$. The average thickness of the stellar components in HI-bearing dwarf galaxies approximates $C/A\sim 0.4$. Furthermore, we observe that the thickness of the stellar disks exhibits weak or negligible dependence on the stellar masses of HI-bearing galaxies.

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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Ultra Diffuse Dwarf Galaxies Hosting Pseudo-bulges

    astro-ph.GA 2024-12 conditional novelty 6.0 of 10

    Five ALFALFA ultra-diffuse galaxies host resolved central pseudo-bulges, and their HI-inferred rotation velocities are high relative to typical dwarfs of similar stellar mass.

  2. Halo Spin Dependence on Environment for HI-bearing galaxies

    astro-ph.GA 2024-11 conditional novelty 4.0 of 10

    A semi-analytic analysis of ALFALFA galaxies finds lower inferred halo spins in denser environments, but the estimator depends on HI mass, leaving the physical interpretation open.

  3. Moderate Influence of Halo Spin on Stellar Mass Distributions in Dwarf and Massive Galaxies

    astro-ph.GA 2024-11 conditional novelty 4.0 of 10

    An analysis of ALFALFA galaxies finds a weak to moderate inverse correlation between estimated halo spin and stellar surface density, with slopes consistent with zero at about 1 sigma.

  4. Strong Correlation between Galactic HI-to-stellar Mass Ratio And Halo Spin Explored by HI-rich Galaxies

    astro-ph.GA 2024-11 reject novelty 4.0 of 10

    Using a semi-analytic spin estimator, the authors claim halo spin strongly correlates with HI-to-stellar mass ratio in ALFALFA galaxies, but the estimator shares a definitional dependence on HI mass with the ratio.

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