Early-type galaxies in the near-infrared: 1.5–2.4 spectroscopy

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Table 3:

NIR spectral indices.
Feature	Line		Cont. 1		Cont. 2
	---------		---------		---------
	$\lambda_{\rm c}$	$\Delta\lambda$	$\lambda_{\rm c}$	$\Delta\lambda$	$\lambda_{\rm c}$	$\Delta\lambda$
	(Å)	(Å)	(Å)	(Å)	(Å)	(Å)
Mg I (1.50 $\mu$ m)	15 040	80	14 960	80	15 120	80
Mg I (1.71 $\mu$ m)	17 098	90	17 033	46	17 206	100
Na I (2.21 $\mu$ m)	22 070	140	21 965	62	22 170	40
Ca I (2.26 $\mu$ m)	22 647	106	22 553	74	22 802	172
CO (2.30 $\mu$ m)	22 990	160	22 802	172	-	-

$\textstyle \parbox{8.7cm}{The central wavelength $\lambda_{\rm c}$\space and ba... ... the continuum bandpass at shorter (Cont. 1) and longer (Cont. 2) wavelengths.}$

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