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• W4387323619 abstract "We apply the barred Schwarzschild method developed by Tahmasebzadeh et al. (2022) to a barred S0 galaxy, NGC 4371, observed by IFU instruments from the TIMER and ATLAS3D projects. We construct the gravitational potential by combining a fixed black hole mass, a spherical dark matter halo, and stellar mass distribution deprojected from $3.6$ $mu$m S$^4$G image considering an axisymmetric disk and a triaxial bar. We create two sets of independent models, fitting the kinematic data derived from TIMER and ATLAS3D, separately. The models fit all the kinematic data remarkably well. We find a consistent bar pattern speed from the two sets of models, with $Omega_{rm p} = 23.6 pm 2.8 hspace{.08cm} mathrm{km hspace{.04cm} s^{-1} hspace{.04cm} kpc^{-1} }$. The dimensionless bar rotation parameter is determined to be $ R_{rm cor}/R_{rm bar}=2.2 pm 0.4$, indicating a slow bar in NGC 4371. Besides, we obtain a dark matter fraction $M_{rm DM}/ M_{rm total}$ of $sim 0.51 pm 0.06$ within the bar region. Our results support the scenario that bars may slow down in the presence of dynamical friction with a significant amount of dark matter in the disk regions. Based on our model, we further decompose the galaxy into multiple 3D orbital structures, including a BP/X bar, a classical bulge, a nuclear disk, and a main disk. The BP/X bar is not perfectly included in the input 3D density model, but BP/X-supporting orbits are picked through the fitting to the kinematic data. This is the first time a real barred galaxy has been modeled utilizing the Schwarzschild method including a 3D bar. Our model can be applied to a large number of nearby barred galaxies with IFU data, and it will significantly improve the previous models in which the bar is not explicitly included." @default.
• W4387323619 created "2023-10-04" @default.
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• W4387323619 date "2023-09-30" @default.
• W4387323619 modified "2023-10-14" @default.
• W4387323619 title "Schwarzschild Modeling of Barred S0 Galaxy NGC 4371" @default.
• W4387323619 doi "https://doi.org/10.48550/arxiv.2310.00497" @default.
• W4387323619 hasPublicationYear "2023" @default.
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