C. Aspin, Gemini Observatory; and B. Reipurth, University of Hawaii, report on observations made at the Gemini 8-m telescope on Mauna Kea. The near-infrared counterpart to IRAS 05436-0007 (cf. IAUC 8284) was as bright as J = 11.1, H = 9.0, and K_s = 7.4 on 2004 Feb. 3 UT in observations with the NIRI instrument. This is 3.6, 3.2, and 2.9 magnitudes brighter in these bands, respectively, than the 2MASS values from 1998 Oct. 7. A K-band NIRI spectrum from the same night shows strong CO band-head emission and the Brackett_gamma line in emission. An optical spectrum obtained with the GMOS instrument on 2004 Feb. 14 shows a prominent H_alpha emission line with P-Cyg profile and a red continuum. These characteristics are consistent with IRAS 05436-0007's currently undergoing an 'EXor' eruption (Herbig 1977, Ap.J. 217, 693; Herbig et al. 2001, PASP 113, 1547).
International Astronomical Union Circular
- Pub Date:
- February 2004