An Atlas of Stellar Spectra

8. B5

The spectral type is determined from the ratio of Si II 4128-4130 to He I 4144. The luminosity class is determined from the appearance of the wings of the hydrogen lines.

TABLE 8
STANDARDS AT B5

Star MKK a delta m HD

delta Per...... B5 III 03:35 +47°28' 3.1 B5

eta CMa.... B5 I 07:20 -29 06 2.4 B5p

kappa Hya.... B5 V 09:35 -13 53 5.0 B3

tau Her...... B5 IV 16:16 +46 33 3.9 B5

67 Oph... B5 I-II 17:55 +02 56 3.9 B5p

Plate 16. Luminosity Effects at B5

Plate 16

High resolution image

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