MG 0414+0534 is a gravitational-lens system at z = 2.64 having a steep power-law continuum and an unusually red color in optical light. We searched for redshifted (12) CO (J = 3--2) emission from MG 0414+0534 and (12) CO (J=1--0) emission from its lensing galaxy at z = 0.468 using the Nobeyama 45-m radio telescope. No significant emission was detected with a rms noise of 5mK at a velocity resolution of 20 km s(-1) . Assuming a velocity width of 400 km s(-1) , we obtained 3 sigma upper limits on the molecular gas mass of 1.1 times 10(11) h(-2) MO for MG 0414+0534 and 5.7 times 10(10) h(-2) MO for the lensing galaxy (q_0 = 0.5, H_0 = 100\ h\ km s(-1) Mpc(-1) ), adopting a standard Galactic CO-to-H_2 conversion factor and neglecting the influence of the lensing event. We examined two views: MG 0414+0534 is a quasar reddened by the interstellar matter in the lensing galaxy or by the interstellar matter surrounding the power-law source.
Publications of the Astronomical Society of Japan
- Pub Date:
- December 1995
- CO EMISSION LINE;
- GALAXIES: INDIVIDUAL (MG 0414+0534);
- GRAVITATIONAL LENSES;