Quasars

Quasars are among the brightest objects in the cosmos, shedding light into the distance universe. My work revolves around detecting these sources in multi-band surveys and estimating their properties.

Publications:

• Chaves-Montero, J., Bonoli, S., Trakhtenbrot, B., et al., 2022, A&A, 660, A95 10.1051/0004-6361/202142567.
  Summary: first method to compute black hole virial masses from multi-band photometric data. We find remarkable agreement between spectroscopic measurements from SDSS and photometric measurements from miniJPAS, a proof-of-concept project of the J-PAS collaboration covering one square degree using the 56 J-PAS narrow-band filters. We find no systematic difference between these measurements, and a scatter ranging from 0.4 to 0.07 dex for masses from log(M_BH[M_sun])=8 to 9.75.
• Doré O., Werner M. W., Ashby M. L. N., Bleem L. E., Bock J., Burt J., Capak P., Chang, T., Chaves-Montero, J., et al., 2018, arXiv, arXiv:1805.05489.
  Summary: report of the an SPHEREx workshop on the synergies between this and other astronomy surveys. My contribution was forecasting the number of very high redshift quasars (z>6) that the SPHEREx survey will detect.
• Chaves-Montero J., Bonoli S., Salvato M., Greisel N., Díaz-García L. A., López-Sanjuan C., Viironen K., et al., 2017, MNRAS, 472, 2085. doi:10.1093/mnras/stx2054.
  Summary: first method to detect quasars from multi-band photometric data by identifying specific emission lines. By comparing photometric observations from the ALHAMBRA survey, which observed two square degrees using 20 medium-band filters, and spectroscopic observations, we found that our method identifies quasars precisely and yields photometric redshifts for these sources with subpercent precision.