Super-Eddington Accretion and Early-Stage Feedback in Ton S180

@misc{condo2026supereddington,
  title = {{Super-Eddington Accretion and Early-Stage Feedback in Ton S180}},
  author = {Pierpaolo Condò and Giacomo Venturi and Eleonora Parlanti and Marco Berton and Enrico Congiu and Alessia Tortosa and Stefano Carniani and Francesco Tombesi and Tommaso Zana and Claudio Ricci and Ezequiel Treister and Luis C. Ho and Enrico Piconcelli and Miguel Coloma Puga and Emilia Järvelä and Luca Crepaldi and Amelia Vietri and Benedetta Dalla Barba},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2609.04317},
  eprint = {2609.04317},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.04317},
}

TY  - UNPB
TI  - Super-Eddington Accretion and Early-Stage Feedback in Ton S180
AU  - Pierpaolo Condò
AU  - Giacomo Venturi
AU  - Eleonora Parlanti
AU  - Marco Berton
AU  - Enrico Congiu
AU  - Alessia Tortosa
AU  - Stefano Carniani
AU  - Francesco Tombesi
AU  - Tommaso Zana
AU  - Claudio Ricci
AU  - Ezequiel Treister
AU  - Luis C. Ho
AU  - Enrico Piconcelli
AU  - Miguel Coloma Puga
AU  - Emilia Järvelä
AU  - Luca Crepaldi
AU  - Amelia Vietri
AU  - Benedetta Dalla Barba
PY  - 2026
DA  - 2026/10/29
PB  - arXiv
DO  - 10.48550/arxiv.2609.04317
UR  - https://arxiv.org/abs/2609.04317
AB  - Narrow-line Seyfert 1 (NLSy1) galaxies are key laboratories for studying rapid supermassive black hole (SMBH) growth and active galactic nucleus (AGN) feedback at high accretion rates. We investigate the nearby NLSy1 Ton S180 with VLT-MUSE optical integral field spectroscopy to connect its nuclear accretion properties with the spatially resolved ionized gas and host-galaxy kinematics. We modeled the unresolved nuclear spectrum and applied a custom point spread function subtraction to recover the host-galaxy emission on kiloparsec scales. The nuclear spectrum requires a complex permitted-line decomposition and a blueshifted [O III] outflow component. Single-epoch estimators and the stellar velocity dispersion imply black hole masses in the range log(M_BH/M_⊙) = 6.5 − 7.7. Combined with the observed luminosity, this implies a dimensionless mass accretion rate of Ṁ / Ṁ_Edd = 4.1 − 980, confirming the extreme accretion regime. The host galaxy shows a circumnuclear ring, an inner elongated structure consistent with a bar, and rotation-dominated gas and stellar kinematics. Simple inflow models do not significantly better reproduce the observed velocity field. We detect a resolved ionized outflow extending about 2 kpc west of the nucleus, with mildly blueshifted velocities (with a maximum of v_max ∼ 340 km s^−1). Its mass outflow rate is only ∼ 4.2 × 10^−4 M_⊙ yr^−1, whereas the unresolved nuclear outflow reaches v_max ∼ 1140 km s^−1 and Ṁ_out > 1.5 M_⊙ yr^−1. This contrast may reflect either weak ionized coupling from nuclear to galactic scales or different episodes of AGN activity over time. These results show that Ton S180 is undergoing rapid SMBH growth, while the observed ionized outflow remains confined to the inner few kiloparsecs and is weak on host-galaxy scales.
ER  -