Dr. O.A. (Oscar) Macias Ramirez PhD
Faculty of Science
ITF
Visiting address
- Science Park 904
- Room number: C4.152
Postal address
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Postbus 94485
1090 GL Amsterdam
Contact details
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Publications
2024
Venville, T. A. A., Duffy, A. R., Crocker, R. M., Macias, O., & Tepper-Garcia, T. (2024). Prospective dark matter annihilation signals from the Sagittarius Dwarf Spheroidal. Monthly Notices of the Royal Astronomical Society, 527(3), 5324-5338. https://doi.org/10.1093/MNRAS/STAD3520 [details]
2023
- Montanari, A., Macias, O., & Moulin, E. (2023). TeV gamma-ray sensitivity to velocity-dependent dark matter models in the Galactic Center. Physical Review D - Particles, Fields, Gravitation and Cosmology, 108(8), Article 083027. https://doi.org/10.1103/PHYSREVD.108.083027 [details]
- the Cherenkov Telescope Array Consortium, & Macias, O. (2023). Sensitivity of the Cherenkov Telescope Array to spectral signatures of hadronic PeVatrons with application to Galactic Supernova Remnants. Astroparticle Physics, 150(102850), 102850. https://doi.org/10.1016/J.ASTROPARTPHYS.2023.102850
2022
- Crocker, R. M., Macias, O., Mackey, D., Krumholz, M. R., Ando, S., Horiuchi, S., Baring, M. G., Gordon, C., Venville, T., Duffy, A. R., Yang, R. Z., Aharonian, F., Hinton, J. A., Song, D., Ruiter, A. J., & Filipović, M. D. (2022). Gamma-ray emission from the Sagittarius dwarf spheroidal galaxy due to millisecond pulsars. Nature Astronomy, 6(11), 1317-1324. https://doi.org/10.1038/s41550-022-01777-x [details]
- Gautam, A., Crocker, R. M., Ferrario, L., Ruiter, A. J., Ploeg, H., Gordon, C., & Macias, O. (2022). Millisecond pulsars from accretion-induced collapse as the origin of the Galactic Centre gamma-ray excess signal. Nature Astronomy, 6(6), 703-707. https://doi.org/10.1038/s41550-022-01658-3 [details]
- Macias, O., van Leijen, H., Song, D., Ando, S., Horiuchi, S., & Crocker, R. M. (2022). CTA sensitivity to the high-energy tail of the Fermi GeV excess. Proceedings of Science, 395, Article 562. https://doi.org/10.22323/1.395.0562 [details]
- Pohl, M., Coleman, P., Gordon, C., & Macias, O. (2022). Neutral atomic hydrogen absorption and the Galactic Center Excess. Proceedings of Science, 395, Article 674. https://doi.org/10.22323/1.395.0674 [details]
- Pohl, M., Macias, O., Coleman, P., & Gordon, C. (2022). Assessing the Impact of Hydrogen Absorption on the Characteristics of the Galactic Center Excess. Astrophysical Journal, 929(2), Article 136. https://doi.org/10.3847/1538-4357/ac6032 [details]
- Siegert, T., Crocker, R. M., Macias, O., Panther, F. H., Calore, F., Song, D., & Horiuchi, S. (2022). Measuring the smearing of the Galactic 511-keV signal: Positron propagation or supernova kicks? Monthly Notices of the Royal Astronomical Society: Letters, 509(1), L11-L16. Advance online publication. https://doi.org/10.1093/mnrasl/slab113 [details]
- Song, D., Macias, O., Horiuchi, S., Crocker, R. M., & Nataf, D. M. (2022). Evidence for inverse-Compton emission from globular clusters. Proceedings of Science, 395, Article 617. https://doi.org/10.22323/1.395.0617 [details]
- Zimmer, F., MacIas, O., Ando, S., Crocker, R. M., & Horiuchi, S. (2022). The Andromeda gamma-ray excess: background systematics of the millisecond pulsars and dark matter interpretations. Monthly Notices of the Royal Astronomical Society, 516(3), 4469-4483. https://doi.org/10.1093/mnras/stac2464 [details]
2021
- MacIas, O., van Leijen, H., Song, D., Ando, S., Horiuchi, S., & Crocker, R. M. (2021). Cherenkov Telescope Array sensitivity to the putative millisecond pulsar population responsible for the Galactic Centre excess. Monthly Notices of the Royal Astronomical Society, 506(2), 1741-1760. https://doi.org/10.1093/mnras/stab1450 [details]
- Rinchiuso, L., Macias, O., Moulin, E., Rodd, N. L., & Slatyer, T. R. (2021). Prospects for Heavy WIMP Dark Matter with CTA: The Wino and Higgsino. Physical Review D. Particles, Fields, Gravitation, and Cosmology, 103(2), Article 023011. https://doi.org/10.1103/PhysRevD.103.023011 [details]
- Song, D., MacIas, O., Horiuchi, S., Crocker, R. M., & Nataf, D. M. (2021). Evidence for a high-energy tail in the gamma-ray spectra of globular clusters. Monthly Notices of the Royal Astronomical Society, 507(4), 5161-5176. https://doi.org/10.1093/mnras/stab2406 [details]
2020
- Abazajian, K. N., Horiuchi, S., Kaplinghat, M., Keeley, R. E., & Macias, O. (2020). Strong constraints on thermal relic dark matter from Fermi-LAT observations of the Galactic Center. Physical Review D. Particles, Fields, Gravitation, and Cosmology, 102(4), Article 043012. https://doi.org/10.1103/PhysRevD.102.043012 [details]
- Buschmann, M., Rodd, N. L., Safdi, B. R., Chang, L. J., Mishra-Sharma, S., Lisanti, M., & Macias, O. (2020). Foreground mismodeling and the point source explanation of the Fermi Galactic Center excess. Physical Review D, 102(2), Article 023023. https://doi.org/10.1103/PhysRevD.102.023023 [details]
- Coleman, B., Paterson, D., Gordon, C., Macias, O., & Ploeg, H. (2020). Maximum Entropy Estimation of the Galactic Bulge Morphology via the VVV Red Clump. Monthly Notices of the Royal Astronomical Society, 495(3), 3350–3372. Advance online publication. https://doi.org/10.1093/mnras/staa1281 [details]
- Foster, J. W., Kahn, Y., MacIas, O., Sun, Z., Eatough, R. P., Kondratiev, V. I., Peters, W. M., Weniger, C., & Safdi, B. R. (2020). Green Bank and Effelsberg Radio Telescope Searches for Axion Dark Matter Conversion in Neutron Star Magnetospheres. Physical Review Letters, 125(17), Article 171301. https://doi.org/10.1103/PhysRevLett.125.171301 [details]
- Hashimoto, D., Macias, O., Nishizawa, A. J., Hayashi, K., Takada, M., Shirasaki, M., & Ando, S. (2020). Constraining dark matter annihilation with HSC low surface brightness galaxies. Journal of Cosmology and Astroparticle Physics, 2020(1), Article 059. https://doi.org/10.1088/1475-7516/2020/01/059 [details]
- Ishiwata, K., Macias, O., Ando, S., & Arimoto, M. (2020). Probing heavy dark matter decays with multi-messenger astrophysical data. Journal of Cosmology and Astroparticle Physics, 2020(1), Article 003. https://doi.org/10.1088/1475-7516/2020/01/003 [details]
- Ploeg, H., Gordon, C., Crocker, R., & Macias, O. (2020). Comparing the Galactic Bulge and Galactic Disk Millisecond Pulsars. Journal of Cosmology and Astroparticle Physics, 2020(12), Article 035. https://doi.org/10.1088/1475-7516/2020/12/035 [details]
- Shirasaki, M., Macias, O., Ando, S., Horiuchi, S., & Yoshida, N. (2020). Cross-correlation of the extragalactic gamma-ray background with the thermal Sunyaev-Zel'dovich effect in the cosmic microwave background. Physical Review D, 101(10), Article 103022. https://doi.org/10.1103/PhysRevD.101.103022 [details]
2019
- Ando, S., Kavanagh, B. J., Macias, O., Alves, T., Broersen, S., Delnoij, S., Goldman, T., Groefsema, J., Kleverlaan, J., Lenssen, J., Muskens, T., Palma Visser, L. X., Peerbooms, E., van der Linden, B., & Verberne, S. (2019). Discovery prospects of dwarf spheroidal galaxies for indirect dark matter searches. Journal of Cosmology and Astroparticle Physics, 2019(10), Article 040. https://doi.org/10.1088/1475-7516/2019/10/040 [details]
- Hashimoto, D., Nishizawa, A. J., Shirasaki, M., Macias, O., Horiuchi, S., Tashiro, H., & Oguri, M. (2019). Measurement of redshift-dependent cross-correlation of HSC clusters and Fermi γ-rays. Monthly Notices of the Royal Astronomical Society, 484(4), 5256-5266. https://doi.org/10.1093/mnras/stz321 [details]
- Macias, O., Horiuchi, S., Kaplinghat, M., Gordon, C., Crocker, R. M., & Nataf, D. M. (2019). Strong evidence that the galactic bulge is shining in gamma rays. Journal of Cosmology and Astroparticle Physics, 2019(9), Article 042. https://doi.org/10.1088/1475-7516/2019/09/042 [details]
- Song, D., Macias, O., & Horiuchi, S. (2019). Inverse Compton emission from millisecond pulsars in the Galactic bulge. Physical Review D, 99(12), Article 123020. https://doi.org/10.1103/PhysRevD.99.123020 [details]
2018
- Hashimoto, D., Nishizawa, A. J., Shirasaki, M., Macias, O., Horiuchi, S., Tashiro, H., & Oguri, M. (2018). Measurement of redshift dependent cross correlation of HSC clusters and Fermi $\gamma$ rays. Monthly Notices of the Royal Astronomical Society. http://adsabs.harvard.edu/abs/2018arXiv180508139H
- Shirasaki, M., Macias, O., Horiuchi, S., Yoshida, N., Lee, C. H., & Nishizawa, A. J. (2018). Correlation of extragalactic γ rays with cosmic matter density distributions from weak gravitational lensing. Physical Review D, 97(12), Article 123015. https://doi.org/10.1103/PhysRevD.97.123015
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Ancillary activities
No ancillary activities
Venville, T. A. A., Duffy, A. R., Crocker, R. M., Macias, O., & Tepper-Garcia, T. (2024). Prospective dark matter annihilation signals from the Sagittarius Dwarf Spheroidal. Monthly Notices of the Royal Astronomical Society, 527(3), 5324-5338.