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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.18260 |
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| _version_ | 1866908725018624000 |
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| author | Tortora, Crescenzo Carollo, Daniela Hunt, Leslie Marleau, Francine Ragusa, Rossella Saifollahi, Teymoor Buitrago, Fernando Cantiello, Michele Conselice, Christopher De Paolis, Francesco De Rijcke, Sven Duc, Pierre-Alain Gallazzi, Anna Piña, Pavel E. Mancera Mateu, Anna Ferre Martin, Garreth Mezcua, Mar Napolitano, Nicola R. Pozzetti, Lucia Read, Justin Rejkuba, Marina Sakowska, Joanna Salucci, Paolo Saremi, Elham Scognamiglio, Diana Shankar, Francesco Spavone, Marilena SWG, the Euclid Local Universe |
| author_facet | Tortora, Crescenzo Carollo, Daniela Hunt, Leslie Marleau, Francine Ragusa, Rossella Saifollahi, Teymoor Buitrago, Fernando Cantiello, Michele Conselice, Christopher De Paolis, Francesco De Rijcke, Sven Duc, Pierre-Alain Gallazzi, Anna Piña, Pavel E. Mancera Mateu, Anna Ferre Martin, Garreth Mezcua, Mar Napolitano, Nicola R. Pozzetti, Lucia Read, Justin Rejkuba, Marina Sakowska, Joanna Salucci, Paolo Saremi, Elham Scognamiglio, Diana Shankar, Francesco Spavone, Marilena SWG, the Euclid Local Universe |
| contents | Dwarf galaxies ($M_{\star} \lesssim 10^{9} M_{\odot}$) are the most numerous galaxies in the Universe and critical probes of dark matter, baryonic feedback, and galaxy formation. Despite significant progress from wide-field imaging surveys, the majority of dwarf candidates beyond the Local Group will lack spectroscopic follow-up, leaving fundamental questions about their internal kinematics, stellar populations, chemical enrichment, and dark matter content unresolved. Existing and planned facilities cannot efficiently provide the necessary spectroscopy for low-surface-brightness dwarfs over wide areas. We advocate for a dedicated large-aperture ($\geq 20$ m), wide-field, highly multiplexed spectroscopic facility with deployable or monolithic IFUs, capable of high signal-to-noise observations down to $I_{\rm E} \gtrsim 22-23$ mag. Such a facility would enable transformative studies of dark matter cores, baryonic feedback, tidal interactions, environmental effects, and stellar populations, extending the spectroscopic exploration of low-mass galaxies to $z \sim 1.5$, and providing decisive tests of $Λ$CDM and alternative dark matter models. Beyond dwarfs, this capability would impact galaxy evolution, strong and weak lensing studies, and cosmology, ensuring that imaging data from the 2030s and 2040s can be fully exploited. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_18260 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unlocking the physics of dwarf galaxies in the 2040s: The case for a next-generation wide-field spectroscopic facility with fibres and IFUs Tortora, Crescenzo Carollo, Daniela Hunt, Leslie Marleau, Francine Ragusa, Rossella Saifollahi, Teymoor Buitrago, Fernando Cantiello, Michele Conselice, Christopher De Paolis, Francesco De Rijcke, Sven Duc, Pierre-Alain Gallazzi, Anna Piña, Pavel E. Mancera Mateu, Anna Ferre Martin, Garreth Mezcua, Mar Napolitano, Nicola R. Pozzetti, Lucia Read, Justin Rejkuba, Marina Sakowska, Joanna Salucci, Paolo Saremi, Elham Scognamiglio, Diana Shankar, Francesco Spavone, Marilena SWG, the Euclid Local Universe Instrumentation and Methods for Astrophysics Astrophysics of Galaxies Dwarf galaxies ($M_{\star} \lesssim 10^{9} M_{\odot}$) are the most numerous galaxies in the Universe and critical probes of dark matter, baryonic feedback, and galaxy formation. Despite significant progress from wide-field imaging surveys, the majority of dwarf candidates beyond the Local Group will lack spectroscopic follow-up, leaving fundamental questions about their internal kinematics, stellar populations, chemical enrichment, and dark matter content unresolved. Existing and planned facilities cannot efficiently provide the necessary spectroscopy for low-surface-brightness dwarfs over wide areas. We advocate for a dedicated large-aperture ($\geq 20$ m), wide-field, highly multiplexed spectroscopic facility with deployable or monolithic IFUs, capable of high signal-to-noise observations down to $I_{\rm E} \gtrsim 22-23$ mag. Such a facility would enable transformative studies of dark matter cores, baryonic feedback, tidal interactions, environmental effects, and stellar populations, extending the spectroscopic exploration of low-mass galaxies to $z \sim 1.5$, and providing decisive tests of $Λ$CDM and alternative dark matter models. Beyond dwarfs, this capability would impact galaxy evolution, strong and weak lensing studies, and cosmology, ensuring that imaging data from the 2030s and 2040s can be fully exploited. |
| title | Unlocking the physics of dwarf galaxies in the 2040s: The case for a next-generation wide-field spectroscopic facility with fibres and IFUs |
| topic | Instrumentation and Methods for Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2512.18260 |