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Articles by Pavel E Mancera
Astrophysics > Astrophysics of Galaxies
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
Astrophysics > Instrumentation and Methods for Astrophysics
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
Astrophysics > Astrophysics of Galaxies
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
Astrophysics > Astrophysics of Galaxies
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
The long life of ultra diffuse galaxies inside low-density dark matter halos: the case of AGC 114905
It has long been known that, in the absence of a dark matter (DM) halo, galaxy discs tend to develop global gravitational instabilities that strongly modify their initial structure. The recent discovery of gas-rich ultra diffuse galaxies (UDGs) that seem to live in DM halos with very low concentrations, a very atypical configuration in the standard cosmological framework, poses therefore a crucial question: is the small contribution from such DM halos sufficient to stabilize the UDG discs?
REBELS-25: discovery of a dynamically cold disc galaxy at z = 7.31
In the current picture of galaxy formation, galaxies in the early Universe should be more dominated by turbulent motion than their lower redshift counterparts as a result of an increase in merger activity and more violent gas accretion (Conselice, Rajgor & Myers 2008; Dekel et al. 2009), as well as more intense active galactic nuclei (AGNs) and stellar feedback (e.g. Hayward & Hopkins 2017; Nelson et al. 2019).
REBELS-25: Discovery of a dynamically cold disc galaxy at z = 7.31
We present high resolution (∼0.14” = 710 pc) ALMA [CII] 158μm and dust continuum follow-up observations of REBELS-25, a [CII]-luminous (L = (1.7 ± 0.2) × 109L ) galaxy at redshift z = 7.3065 ± 0.0001. These high resolution, high signal-to-noise observations allow us to study the sub-kpc morphology and kinematics of this massive ( ) star-forming (SFR ) galaxy in the Epoch of Reionisation.
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