According to Bhāgavatapurāṇa (Bhagavatapurana), Arka is one of Aṣṭavasu (Ashtavasu; the eight Vasus). His wife is Vāsanā (Vasana), and Tarṣa (Tarsha) is their son.

Bhāgavatpurāṇa Vols. 1-12(6.6.11.13)