| Autor: |
Pierel, J. D. R., Jones, D. O., Kenworthy, W. D., Dai, M., Kessler, R., Ashall, C., Do, A., Peterson, E. R., Shappee, B. J., Siebert, M. R., Barna, T., Brink, T. G., Burke, J., Calamida, A., Camacho-Neves, Y., de Jaeger, T., Filippenko, A. V., Foley, R. J., Galbany, L., Fox, O. D., Gomez, S., Hiramatsu, D., Hounsell, R., Howell, D. A., Jha, S. W., Kwok, L. A., Pérez-Fournon, I., Poidevin, F., Rest, A., Rubin, D., Scolnic, D. M., Shirley, R., Strolger, L. G., Tinyanont, S., Wang, Q. |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
The Astrophysical Journal, Volume 939, Issue 1, id.11, 16 pp (2022) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.3847/1538-4357/ac93f9 |
| Popis: |
A large fraction of Type Ia supernova (SN Ia) observations over the next decade will be in the near-infrared (NIR), at wavelengths beyond the reach of the current standard light-curve model for SN Ia cosmology, SALT3 ($\sim 2800$--8700$A$ central filter wavelength). To harness this new SN Ia sample and reduce future light-curve standardization systematic uncertainties, we train SALT3 at NIR wavelengths (SALT3-NIR) up to 2 $\mu$m with the open-source model-training software SALTShaker, which can easily accommodate future observations. Using simulated data we show that the training process constrains the NIR model to $\sim 2$--3% across the phase range ($-20$ to $50$ days). We find that Hubble residual (HR) scatter is smaller using the NIR alone or optical+NIR compared to optical alone, by up to $\sim 30$% depending on filter choice (95% confidence). There is significant correlation between NIR light-curve stretch measurements and luminosity, with stretch and color corrections often improving HR scatter by up to $\sim20%$. For SN Ia observations expected from the \textit{Roman Space Telescope}, SALT3-NIR increases the amount of usable data in the SALT framework by $\sim 20$% at redshift $z\lesssim0.4$ and by $\sim 50$% at $z\lesssim0.15$. The SALT3-NIR model is part of the open-source {\tt SNCosmo} and {\tt SNANA} SN Ia cosmology packages. |
| Databáze: |
arXiv |
| Externí odkaz: |
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