The chemical inventory of Hot corinos and protoplanetary disks: An observer's view*

Hot corinos are hot (≥100 K), dense (≥10⁶ cm^-3) regions in solar-type protostars enriched of the so-called iCOMs, for interstellar complex organic molecules.

They were discovered at the beginning of 2000s towards the protostar IRAS16293-2422 (Ceccarelli et al. 2000; Cazaux et al. 2003; Ceccarelli 2004). After a decade-long frustrating search for other hot corinos ending up in adding only 3 additional ones, the advent of the IRAM/NOEMA and ALMA millimetre interferometer finally allowed to discover about two dozen hot corino in the last fee years (e.g. see the recent review by Ceccarelli et al. 2023). This has allowed to start studying their molecular content, particularly the iCOM abundances and their interdependence. That said, one has to keep in mind that, with the notable exception of IRAS16293-2422 (see Jorgensen et al. 2016; Manigand et al. 2021), only a bit more than a handful of iCOMs are detected in hot corinos: methanol, acetaldehyde, methyl formate, dimethyl ether, methyl cyanide, glycoaldehyde, ethanol, formamide.

In this talk, I will review what we know from an observational and chemical of view. I will especially discuss what we do not know yet and what is needed to progress in pur understanding of the organic content of hot corinos and possible inheritance from the solar protostellar phase.

REFERENCES

Cazaux S. et al., 2003 ApJL, 593, L51

Ceccarelli C. et al., 2000 A&A, 357, L9

Ceccarelli C., 2004 Star Formation in the ISM, vol. 323 of  Astr.Soc.PacificConf. (D. Johnstone and et al.), p. 195

Ceccarelli C., et al., 2023, in Inutsuka S., Aikawa Y., Muto T., Tomida K., Tamura M., eds, Astronomical Society of the Pacific Conference Series Vol. 534, Astronomical Society of the Pacific Conference Series. p. 379

Jørgensen J. K. et al., 2016 A&A, 595, A117

Manigand S. et al., 2021 A&A, 645, A5