ZTF SN Ia DR2: Properties of the low-mass host galaxies of Type Ia supernovae in a volume-limited sample

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Table 3.

Sample selection effect on the number of HV SNe Ia in low-mass galaxies.

v_Si II(6355) ^( * )	log(M_⋆/M_⊙) ^( † )	Phase	Redshift ^(a)	# HV SN Ia ^(b)
(x10³ km s⁻¹)		(d)	(z)
12	10	[ − 5 : 5]	all	34 (40 ± 6)
12	10	[ − 5 : 5]	exc	26 (23 ± 5)
12	10	[ − 3 : 3]	all	20 (31 ± 6)
12	10	[ − 3 : 3]	exc	16 (19 ± 4)
11.8	9.5	[ − 5 : 5]	all	29 (27 ± 5)
11.8	9.5	[ − 5 : 5]	exc	19 (15 ± 4)
11.8	9.5	[ − 3 : 3]	all	16 (18 ± 4)
11.8	9.5	[ − 3 : 3]	exc	12 (11 ± 3)

Notes. ^( * )The split value for the HV and NV SNe Ia. ^( † )The split value for the low and high mass galaxies.

^(a)

Sample with all redshift sources are shown as all and without those of SNID template matched sources are shown as exc.

^(b)

Number of HV SNe Ia in low-mass galaxies. The expected values, assuming that the rate of HV SNe Ia is the same irrespective of host galaxy stellar mass, are shown in parentheses, along with Poisson uncertainties.

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