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We present the first scattered-light images of the debris disk around 49ceti, a ~40 Myr A1 main sequence star at 59 pc, famous for hosting two massivedust belts as well as large quantities of atomic and molecular gas. The outerdisk is revealed in reprocessed archival Hubble Space Telescope NICMOS F110Wimages, as well as new coronagraphic H band images from the Very LargeTelescope SPHERE instrument. The disk extends from 1.1" (65 AU) to 4.6" (250AU), and is seen at an inclination of 73degr, which refines previousmeasurements at lower angular resolution. We also report no companion detectionlarger than 3 M_Jup at projected separations beyond 20 AU from the star(0.34"). Comparison between the F110W and H-band images is consistent with agrey color of 49 ceti's dust, indicating grains larger than >2microns. Ourphotometric measurements indicate a scattering efficiency / infrared excessratio of 0.2-0.4, relatively low compared to other characterized debris disks.We find that 49 ceti presents morphological and scattering properties verysimilar to the gas-rich HD 131835 system. From our constraint on the diskinclination we find that the atomic gas previously detected in absorption mustextend to the inner disk, and that the latter must be depleted of CO gas.Building on previous studies, we propose a schematic view of the systemdescribing the dust and gas structure around 49 ceti and hypothetic scenariosfor the gas nature and origin.

First scattered-light images of the gas-rich debris disk around 49 Ceti