A Bigger Cloud 9? New H i Observations of the RELHIC Candidate M94- Cloud 9

We present new H i observations of the REionization-Limited H i Cloud (RELHIC) candidate, M94-CL9, detected around M94 by Zhou et al. using the Five-hundred-meter Aperture Spherical Telescope (FAST). M94-CL9's H i properties as detected by FAST are consistent with a RELHIC as noted by Benitez-Llambay & Navarro. Our observations with the Robert C. Byrd Green Bank Telescope detect greater H i emission in M94-CL9 and result in H i properties that are larger (corrected velocity width, W 50, c , t = 35.7 ± 0.6 km s −1 ; and integrated flux, ∫ Sdv = 0.28 ± 0.04 Jy km s −1 ) than those found by Zhou et al. but that match those from the FAST All-Sky H i survey. These larger properties do not preclude M94-CL9 from being a RELHIC, but the wider spectral extent and spectral asymmetry reported here may be in tension with predictions of RELHIC properties.