TY - JOUR
T1 - Newly discovered Planetary Nebulae population in Andromeda (M31)
T2 - PN Luminosity function and implications for the late stages of stellar evolution
AU - Bhattacharya, Souradeep
AU - Arnaboldi, Magda
AU - Hartke, Johanna
AU - Gerhard, Ortwin
AU - Comte, Valentin
AU - McConnachie, Alan
AU - Harris, William E.
N1 - Publisher Copyright:
© International Astronomical Union 2019.
PY - 2018
Y1 - 2018
N2 - Stars with masses between ∼ 0.7 and 8 M☉ end their lives as Planetary Nebulae (PNe). With the MegaCam at CFHT, we have carried out a survey of the central 16 sq. degrees of Andromeda (M31) reaching the outer disk and halo, using a narrow-band [OIII]5007 and a broad-band g filter. This survey extends previous PN samples both in uniform area coverage and depth. We identify ∼4000 PNe in M31, of which ∼3000 are new discoveries. We detect PNe down to ∼6 mag below the bright cut-off of the PN luminosity function (PNLF), ∼2 mag deeper than in previous works. We detect a steep rise in the number of PNe at ∼4.5 mag fainter than the bright cut-off. It persists as we go radially outwards and is steeper than that seen in the Magellanic clouds. We explore possible reasons for this rise, which give insights into the stellar population of M31.
AB - Stars with masses between ∼ 0.7 and 8 M☉ end their lives as Planetary Nebulae (PNe). With the MegaCam at CFHT, we have carried out a survey of the central 16 sq. degrees of Andromeda (M31) reaching the outer disk and halo, using a narrow-band [OIII]5007 and a broad-band g filter. This survey extends previous PN samples both in uniform area coverage and depth. We identify ∼4000 PNe in M31, of which ∼3000 are new discoveries. We detect PNe down to ∼6 mag below the bright cut-off of the PN luminosity function (PNLF), ∼2 mag deeper than in previous works. We detect a steep rise in the number of PNe at ∼4.5 mag fainter than the bright cut-off. It persists as we go radially outwards and is steeper than that seen in the Magellanic clouds. We explore possible reasons for this rise, which give insights into the stellar population of M31.
KW - galaxies: individual (M31)
KW - planetary nebulae: general
UR - http://www.scopus.com/inward/record.url?scp=85077369269&partnerID=8YFLogxK
U2 - 10.1017/S1743921318005446
DO - 10.1017/S1743921318005446
M3 - Article
AN - SCOPUS:85077369269
SN - 1743-9213
VL - 14
SP - 201
EP - 205
JO - Proceedings of the International Astronomical Union
JF - Proceedings of the International Astronomical Union
ER -