Spectroscopic identification of a redshift 1.55 supernova host galaxy from the Subaru Deep Field Supernova Survey

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Table 2

Derived properties of the SN host galaxy hSDF0705.25.

Property	Value

Redshift	z = 1.54768 ± 0.00008
Star-formation rate^a^b	SFR = 3.2 ± 0.5 M_⊙ yr^-1
Metallicity (PP04)	12 + log (O/H) = 8.5 ± 0.2
Metallicity (M08)	12 + log (O/H) = 8.8 ± 0.2

Stellar mass^c
Specific SFR^d
Host extinction^c	mag
Stellar age^c

Notes.

^(a)

Assuming a Chabrier (2003) IMF.

^(b)

SFR is a lower limit as extinction in the host galaxy would make the intrinsic SFR higher by 34% (A_V = 0.4).

^(c)

Using an exponentially declining star-formation history, redshift fixed to the spectroscopic redshift, and metallicity fixed to Z = 0.008 (i.e., 12 + log (O/H) ~ 8.4).

^(d)

Assuming A_V = 0.4 corresponds to a shift of Δlog (sSFR) = + 0.127.

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