The ALMA View of Positive Black Hole Feedback in the Dwarf Galaxy Henize 2–10

• DOI: 10.3847/1538-4357/ad1b62
• Publication Date: 2024-03-04T12:00:45Z
• Authors: Hansung B. Gim; Amy E. Reines
• Keywords: Black hole (networking)

Abstract Henize 2–10 is a dwarf starburst galaxy hosting ∼10 6 M ⊙ black hole (BH) that driving an ionized outflow and triggering star formation within the central ∼100 pc of galaxy. Here, we present Atacama Large Millimeter/submillimeter Array continuum observations from 99 to 340 GHz, as well spectral line molecules CO (1–0, 3–2), HCN HCO+ with focus on BH its vicinity. Incorporating centimeter-wave radio measurements literature, show energy distribution dominated by synchrotron emission 1.4 index α ≈ − 0.5. We analyze data identify elongated molecular gas structure around velocity distinct surrounding regions. The physical extent this ≈130 × 30 mass . Despite abundance in general region, position significantly offset peak intensity, which may explain why radiating at very low Eddington ratio. Our analysis spatially resolved ratio between J = 3–2 1–0 implies vicinity highly excited, particularly interface regions triggered formation. This suggests cold being shocked bipolar BH, supporting case for positive feedback.