Overmassive black holes in dwarf galaxies out to z$\sim$0.9 in the VIPERS survey

Abstract

Supermassive black holes (SMBHs) are thought to originate from early Universe seed black holes of mass $M_{\mathrm{BH}}\sim 10^2$-10${}^5$ M${}_{\odot }$ and grown through cosmic time. Such seeds could be powering the active galactic nuclei (AGN) found in today's dwarf galaxies. However, probing a connection between the early seeds and local SMBHs has not yet been observationally possible. Massive black holes hosted in dwarf galaxies at intermediate redshifts, on the other hand, may represent the evolved counterparts of the seeds formed at very early times. We present a sample of seven broad-line AGN in dwarf galaxies with a spectroscopic redshift ranging from z=0.35 to z=0.93. The sources are drawn from the VIPERS survey as having a stellar mass ($M_{\ast }$) LMC-like derived from spectral energy distribution fitting and they are all star-forming galaxies. Six of these sources are also X-ray AGN. The AGN are powered by SMBHs of $>10^7$ M${}_{\odot }$, more massive than expected from the $M_{\mathrm{BH}}$-$M_{\ast }$ scaling relation of AGN. Based on semi-analytical simulations, we find that these objects are likely overmassive with respect to their hosts since early times (z$>$4), independently of whether they formed as heavy ($\sim 10^5$ M${}_{\odot }$) or light ($\sim 10^2$ M${}_{\odot }$) seed black holes. In our simulations, these objects tend to grow faster than their host galaxies, contradicting models of synchronized growth. The host galaxies are found to possibly evolve into massive systems by z$\sim$0, indicating that local SMBHs in massive galaxies could originate in dwarf galaxies hosting seed black holes at higher z.

13 pages, 4 figures, accepted for publication in ApJ Letters

References in corpus (32)

• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• X-CIGALE: fitting AGN/galaxy SEDs from X-ray to infrared
• Observational evidence for intermediate-mass black holes
• A Supermassive Black Hole in an Ultracompact Dwarf Galaxy
• The mass relations between supermassive black holes and their host galaxies at 1<z<2 with HST-WFC3
• Supermassive black holes in cosmological simulations I: M_BH-M_star relation and black hole mass function
• No significant evolution of relations between Black hole mass and Galaxy total stellar mass up to z~2.5
• Hidden AGN in dwarf galaxies revealed by MaNGA: light echoes, off-nuclear wanderers, and a new broad-line AGN
• Radio jets from AGN in dwarf galaxies in the COSMOS survey: mechanical feedback out to redshift $\sim$3.4
• Evolution in the Black Hole - Galaxy Scaling Relations and the Duty Cycle of Nuclear Activity in Star-Forming Galaxies
• A little FABLE: exploring AGN feedback in dwarf galaxies with cosmological simulations
• Multi-wavelength properties of Type 1 and Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey
• Black hole mass estimation for Active Galactic Nuclei from a new angle
• A Self-Calibrating Halo-Based Group Finder: Application to SDSS
• Radio AGN in nearby dwarf galaxies: the important role of AGN in dwarf-galaxy evolution
• The most massive black holes on the Fundamental Plane of Black Hole Accretion
• Multi-flavour SMBH seeding and evolution in cosmological environments
• Unveiling early black hole growth with multi-frequency gravitational wave observations
• Dwarf AGNs from Optical Variability for the Origins of Seeds (DAVOS): Insights from the Dark Energy Survey Deep Fields
• Dwarf galaxies might not be the birth sites of supermassive black holes
• Hundreds of Low-Mass Active Galaxies in the Galaxy And Mass Assembly (GAMA) Survey
• Was 49b: An Overmassive AGN in a Merging Dwarf Galaxy?
• On the formation mechanisms of compact elliptical galaxies
• The environment of AGN dwarf galaxies at z$\sim$0.7 from the VIPERS survey
• A search for active galactic nuclei in low-mass compact galaxies
• Galaxies with monstrous black holes in galaxy cluster environments
• AGN and Dwarf Galaxy Gas Kinematics
• Black Hole and Galaxy Coevolution in Moderately Luminous Active Galactic Nuclei at z~1.4 in SXDF
• Environments of dwarf galaxies with optical AGN characteristics
• HSC-XD 52: An X-ray detected AGN in a low-mass galaxy at $z\sim 0.56$

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