Table 2.
Properties of the hostless SNe Ia from the volume-limited ZTF DR2 SN Ia sample.
| SN name | Redshift ( * ) | Sub-type | SALT2 x1 | SALT2 c | Mg, SN(a) | Mi, host upper | log(M⋆/M⊙) | AV | Galactic latitude (b) |
|---|---|---|---|---|---|---|---|---|---|
| (mag) | limit (mag) | upper limit | (mag) | (deg) | |||||
| SN 2019eks | 0.047 ± 0.003 | 99aa-like | 0.66 ± 0.16 | −0.12 ± 0.04 | −19.00 ± 0.04 | −14.0 | < 6.6 | 0.67 | 10.1 |
| SN 2020bdq | 0.043 ± 0.004 | Normal | 0.07 ± 0.40 | −0.15 ± 0.04 | −18.90 ± 0.06 | −13.6 | < 6.6 | 0.37 | 7.6 |
| SN 2020isd | 0.030 ± 0.003 | Ia-unclear | 1.07 ± 0.35 | 0.13 ± 0.04 | −18.98 ± 0.06 | −14.2 | < 6.0 | 2.18 | 12.2 |
| SN 2020lmd | 0.011 | Normal | 2.12 ± 0.29 | 0.01 ± 0.04 | −18.31 ± 0.05 | −11.2 | < 5.3 | 1.11 | −8.0 |
| SN 2020lmd ( † ) | 0.018 | Normal | 2.12 ± 0.29 | 0.01 ± 0.04 | −18.31 ± 0.05 | −12.1 | < 6.0 | 1.11 | −8.0 |
| SN 2020lyt | 0.037 ± 0.003 | Ia-unclear | −0.42 ± 1.08 | 0.13 ± 0.15 | −19.04 ± 0.29 | −13.2 | < 6.5 | 0.15 | −29.8 |
| SN 2020rzx | 0.041 ± 0.003 | Normal | 1.29 ± 0.09 | −0.07 ± 0.03 | −19.18 ± 0.04 | −13.7 | < 6.5 | 0.64 | −18.8 |
Notes. ( * )The upper bounds of the redshifts are used to place the most conservative limits on the host parameters.
( † )Due to the HV feature observed in the Si IIλ6355 line, the SN matches better with observations at higher redshifts. In this study, we identified the upper range of redshifts where the SN showed the best match for the HV feature. In the subsequent analysis, we use the values calculated from this optimal redshift value.
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