A4 Vertaisarvioitu artikkeli konferenssijulkaisussa
Survey of Planetary Nebulae in the Andromeda galaxy (M 31)
Tekijät: Bhattacharya, Souradeep; Arnaboldi, Magda; Gerhard, Ortwin; Caldwell, Nelson; Kobayashi, Chiaki; Hammer, Francois; Yang, Yanbin; Freeman, Kenneth C.; Hartke, Johanna; McConnachie, Alan
Toimittaja: De Marco, Orsola; Zijlstra, Albert; Szczerba, Ryszard
Konferenssin vakiintunut nimi: Symposium of the International Astronomical Union
Julkaisuvuosi: 2025
Lehti: Proceedings of the International Astronomical Union
Kokoomateoksen nimi: Planetary Nebulae : A Universal Toolbox in the Era of Precision Astrophysics
Sarjan nimi: IAU Symposium
Vuosikerta: 19
Numero: 384
Aloitussivu: 21
Lopetussivu: 30
ISSN: 1743-9213
eISSN: 1743-9221
DOI: https://doi.org/10.1017/S174392132400022X
Julkaisun avoimuus kirjaamishetkellä: Ei avoimesti saatavilla
Julkaisukanavan avoimuus : Osittain avoin julkaisukanava
Verkko-osoite: https://doi.org/10.1017/S174392132400022X
We summarize the main results from the survey of Planetary Nebulae (PNe) in M 31 with Megacam@CFHT and subsequent spectroscopy with Hectospec@MMT. We identified ∼5000 PNe in M 31 (∼1200 with spectroscopy; ∼200 with chemical abundances). We find a PN Luminosity Function faint-end rise, linked to a percentage of older stars in the parent population. We utilize PN extinction to distinguish young and old PNe. We find that the [Ar/H] vs [O/Ar] plane for emission-line nebulae is analogous to the [Fe/H] vs [α/Fe] plane for stars, and exploration of the M 31 disc PNe in this plane allowed us to constrain its chemical enrichment history. We find the kinematically and chemically distinct thin and thick discs of M 31, and that the G1-clump substructure is formed from perturbed disc material. We infer that M 31 has had a wet major (mass-ratio∼1:5) merger ∼2.5-4 Gyr ago, and obtain important constraints on the cannibalized satellite properties.
Julkaisussa olevat rahoitustiedot:
SB is funded by the INSPIRE Faculty award (DST/INSPIRE/04/2020/002224), Department of Science and Technology (DST), Government of India. SB acknowledges support from the IMPRS on Astrophysics at the LMU Munich during his PhD.
