A fair use statement regarding the full text of the request

Your requested [CEN 34-high-mass YSO in M 17 or background post-AGB star?] is currently limited to Purple Mountain Observatory，Chinese Academy of Sciences internal sharing.

To solicit author authorization, you need to provide the following information: name, organization, personal e-mail, reason for request. The information you provide will be reviewed and you are committed to the truth of the information provided. The personal information you provide will be protected according to law.