Salesforce Flow is the only declarative automation tool that can be triggered when a record is deleted. The administrator can create a record-triggered flow that initiates when a star record is deleted. This flow can then be configured to perform actions, such as sending a custom email notification to the relevant scientists. The notification can include details from the deleted record and identify the user who performed the deletion, fulfilling all aspects of the requirement.

A. Heroku is an external platform for building custom applications and is not a standard, declarative automation tool within Salesforce for this type of task.

B. Process Builder cannot be triggered by a record deletion event; it only works on record creation and updates.

C. Workflow Rules, like Process Builder, do not support triggers on record deletion. They are limited to record creation and update events.

1. Salesforce Help, Record-Triggered Flow. "A record-triggered flow starts when a record is created, updated, or deleted. The flow runs in the background."

2. Salesforce Architects, Record-Triggered Automation Decision Guide. "Use a record-triggered flow when you need to... perform actions after a record is deleted." The guide explicitly contrasts this with Workflow Rules and Process Builder, which cannot trigger on delete.