464
H. Padmanabhan
to uncover fundamental physics constraints from the hitherto unexplored epochs of
Cosmic Dawn and reionization.
Acknowledgments I thank the organizers of the Quantum Theory and Symmetries (QTS - XI)
conference for the invitation to a productive and enriching meeting. I thank my collaborators Adam
Amara, Stefano Camera and Alexandre Refregier with whom most of the work described here was
done, and several others for very useful and interesting discussions.
References
1. S. Camera, H. Padmanabhan, Beyond ΛCDM with HI intensity mapping: robustness of
cosmological constraints in the presence of astrophysics. MNRAS 496, 4115 (2020). https://
doi.org/10.1093/mnras/staa1663
2. S. Cunnington, L. Wolz, A. Pourtsidou, D. Bacon, Impact of foregrounds on HI intensity
mapping cross-correlations with optical surveys (2019). e-prints. arXiv:1904.01479
3. A.F. Heavens, T.D. Kitching, L. Verde, On model selection forecasting, Dark Energy and
modified gravity. Mon. Not. R. Astron. Soc. 380, 1029–1035 (2007). https://doi.org/10.1111/
j.1365-2966.2007.12134.x
4. E.D. Kovetz, P.C. Breysse, A. Lidz, J. Bock, C.M. Bradford, T.C. Chang, S. Foreman, H.
Padmanabhan, A. Pullen, D. Riechers, M.B. Silva, E. Switzer, Astrophysics and cosmology
with line-intensity mapping (2019). e-prints. arXiv:1903.04496
5. D.N. Limber, The analysis of counts of the extragalactic nebulae in terms of a fluctuating
density field. Astrophys. J. 117, 134 (1953). https://doi.org/10.1086/145672
6. A. Loeb, J.S.B. Wyithe, Possibility of precise measurement of the cosmological power
spectrum with a dedicated survey of 21cm emission after reionization. Phys. Rev. Lett. 100(16),
161301 (2008). https://doi.org/10.1103/PhysRevLett.100.161301
7. A.V. Macciò, A.A. Dutton, F.C. van den Bosch, B. Moore, D. Potter, J. Stadel, Concentration,
spin and shape of dark matter haloes: scatter and the dependence on mass and environment.
Mon. Not. R. Astron. Soc. 378, 55–71 (2007). https://doi.org/10.1111/j.1365-2966.2007.
11720.x
8. H. Padmanabhan, Constraining the CO intensity mapping power spectrum at intermediate
redshifts. Mon. Not. R. Astron. Soc. 475, 1477–1484 (2018). https://doi.org/10.1093/mnras/
stx3250
9. H. Padmanabhan, Constraining the evolution of [C II] intensity through the end stages of
reionization. Mon. Not. R. Astron. Soc. 488(3), 3014–3023 (2019). https://doi.org/10.1093/
mnras/stz1878
10. H. Padmanabhan, A. Refregier, Constraining a halo model for cosmological neutral hydrogen.
Mon. Not. R. Astron. Soc. 464(4), 4008–4017 (2017). https://doi.org/10.1093/mnras/stw2706
11. H. Padmanabhan, A. Refregier, A. Amara, A halo model for cosmological neutral hydrogen:
abundances and clustering H i abundances and clustering. Mon. Not. R. Astron. Soc. 469(2),
2323–2334 (2017). https://doi.org/10.1093/mnras/stx979
12. H. Padmanabhan, A. Refregier, A. Amara, Cross-correlating 21 cm and galaxy surveys:
implications for cosmology and astrophysics (2019). e-prints. arXiv:1909.11104
13. H. Padmanabhan, A. Refregier, A. Amara, Impact of astrophysics on cosmology forecasts for
21 cm surveys. Mon. Not. R. Astron. Soc. 485(3), 4060–4070 (2019). https://doi.org/10.1093/
mnras/stz683
14. M.G. Santos, A. Cooray, L. Knox, Multifrequency analysis of 21 centimeter fluctuations from
the era of reionization. Astrophys. J. 625(2), 575–587 (2005). https://doi.org/10.1086/429857
15. S. Seehars, A. Paranjape, A. Witzemann, A. Refregier, A. Amara, J. Akeret, Simulating the
large-scale structure of HI intensity maps. J. Cosmol. Astropart. Phys. 3, 001 (2016). https://
doi.org/10.1088/1475-7516/2016/03/001
H. Padmanabhan
to uncover fundamental physics constraints from the hitherto unexplored epochs of
Cosmic Dawn and reionization.
Acknowledgments I thank the organizers of the Quantum Theory and Symmetries (QTS - XI)
conference for the invitation to a productive and enriching meeting. I thank my collaborators Adam
Amara, Stefano Camera and Alexandre Refregier with whom most of the work described here was
done, and several others for very useful and interesting discussions.
References
1. S. Camera, H. Padmanabhan, Beyond ΛCDM with HI intensity mapping: robustness of
cosmological constraints in the presence of astrophysics. MNRAS 496, 4115 (2020). https://
doi.org/10.1093/mnras/staa1663
2. S. Cunnington, L. Wolz, A. Pourtsidou, D. Bacon, Impact of foregrounds on HI intensity
mapping cross-correlations with optical surveys (2019). e-prints. arXiv:1904.01479
3. A.F. Heavens, T.D. Kitching, L. Verde, On model selection forecasting, Dark Energy and
modified gravity. Mon. Not. R. Astron. Soc. 380, 1029–1035 (2007). https://doi.org/10.1111/
j.1365-2966.2007.12134.x
4. E.D. Kovetz, P.C. Breysse, A. Lidz, J. Bock, C.M. Bradford, T.C. Chang, S. Foreman, H.
Padmanabhan, A. Pullen, D. Riechers, M.B. Silva, E. Switzer, Astrophysics and cosmology
with line-intensity mapping (2019). e-prints. arXiv:1903.04496
5. D.N. Limber, The analysis of counts of the extragalactic nebulae in terms of a fluctuating
density field. Astrophys. J. 117, 134 (1953). https://doi.org/10.1086/145672
6. A. Loeb, J.S.B. Wyithe, Possibility of precise measurement of the cosmological power
spectrum with a dedicated survey of 21cm emission after reionization. Phys. Rev. Lett. 100(16),
161301 (2008). https://doi.org/10.1103/PhysRevLett.100.161301
7. A.V. Macciò, A.A. Dutton, F.C. van den Bosch, B. Moore, D. Potter, J. Stadel, Concentration,
spin and shape of dark matter haloes: scatter and the dependence on mass and environment.
Mon. Not. R. Astron. Soc. 378, 55–71 (2007). https://doi.org/10.1111/j.1365-2966.2007.
11720.x
8. H. Padmanabhan, Constraining the CO intensity mapping power spectrum at intermediate
redshifts. Mon. Not. R. Astron. Soc. 475, 1477–1484 (2018). https://doi.org/10.1093/mnras/
stx3250
9. H. Padmanabhan, Constraining the evolution of [C II] intensity through the end stages of
reionization. Mon. Not. R. Astron. Soc. 488(3), 3014–3023 (2019). https://doi.org/10.1093/
mnras/stz1878
10. H. Padmanabhan, A. Refregier, Constraining a halo model for cosmological neutral hydrogen.
Mon. Not. R. Astron. Soc. 464(4), 4008–4017 (2017). https://doi.org/10.1093/mnras/stw2706
11. H. Padmanabhan, A. Refregier, A. Amara, A halo model for cosmological neutral hydrogen:
abundances and clustering H i abundances and clustering. Mon. Not. R. Astron. Soc. 469(2),
2323–2334 (2017). https://doi.org/10.1093/mnras/stx979
12. H. Padmanabhan, A. Refregier, A. Amara, Cross-correlating 21 cm and galaxy surveys:
implications for cosmology and astrophysics (2019). e-prints. arXiv:1909.11104
13. H. Padmanabhan, A. Refregier, A. Amara, Impact of astrophysics on cosmology forecasts for
21 cm surveys. Mon. Not. R. Astron. Soc. 485(3), 4060–4070 (2019). https://doi.org/10.1093/
mnras/stz683
14. M.G. Santos, A. Cooray, L. Knox, Multifrequency analysis of 21 centimeter fluctuations from
the era of reionization. Astrophys. J. 625(2), 575–587 (2005). https://doi.org/10.1086/429857
15. S. Seehars, A. Paranjape, A. Witzemann, A. Refregier, A. Amara, J. Akeret, Simulating the
large-scale structure of HI intensity maps. J. Cosmol. Astropart. Phys. 3, 001 (2016). https://
doi.org/10.1088/1475-7516/2016/03/001