The halo of M49 and its environment as traced by planetary nebulae

Johanna Hartke; Magda Arnaboldi; Alessia Longobardi; Ortwin Gerhard; Ken Freeman; Sadanori Okamura

doi:10.1017/S1743921317000709

The halo of M49 and its environment as traced by planetary nebulae

Johanna Hartke, Magda Arnaboldi, Alessia Longobardi, Ortwin Gerhard, Ken Freeman, Sadanori Okamura

Research output: Contribution to journal › Article › peer-review

Abstract

We investigate the stellar halo of the nearby elliptical Virgo-cluster galaxy M49 using Planetary Nebulae (PNe). M49 is the second-brightest galaxy of the Virgo cluster and is at the center of the Virgo subcluster B. We present an extended catalogue extracted from a narrow-band survey carried out with Subaru's Suprime Cam, consisting of 735 PNe down to a limiting magnitude of m₅₀₀₇ = 29.3. This PNe population traces the halo out to 155 kpc from the galaxy's center, which provides accurate measurement of the luminosity-specific PN-number (α-parameter) in the inner and outer regions of M49's halo. We are also able to determine the morphological variation of the planetary nebulae luminosity function (PNLF), that may trace different parent stellar populations. This enables us to identify the transition from the PN-scarce, possibly metal-rich, galaxy halo to the PN-rich, metal-poor, outer component.

Original language	English
Pages (from-to)	293-297
Number of pages	5
Journal	Proceedings of the International Astronomical Union
Volume	12
Issue number	S323
DOIs	https://doi.org/10.1017/S1743921317000709
Publication status	Published - 1 Oct 2016

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title = "The halo of M49 and its environment as traced by planetary nebulae",

abstract = "We investigate the stellar halo of the nearby elliptical Virgo-cluster galaxy M49 using Planetary Nebulae (PNe). M49 is the second-brightest galaxy of the Virgo cluster and is at the center of the Virgo subcluster B. We present an extended catalogue extracted from a narrow-band survey carried out with Subaru's Suprime Cam, consisting of 735 PNe down to a limiting magnitude of m5007 = 29.3. This PNe population traces the halo out to 155 kpc from the galaxy's center, which provides accurate measurement of the luminosity-specific PN-number (α-parameter) in the inner and outer regions of M49's halo. We are also able to determine the morphological variation of the planetary nebulae luminosity function (PNLF), that may trace different parent stellar populations. This enables us to identify the transition from the PN-scarce, possibly metal-rich, galaxy halo to the PN-rich, metal-poor, outer component.",

keywords = "cD, galaxies: clusters: individual (Virgo), galaxies: elliptical and lenticular, galaxies: individual (M49), planetary nebulae: general",

author = "Johanna Hartke and Magda Arnaboldi and Alessia Longobardi and Ortwin Gerhard and Ken Freeman and Sadanori Okamura",

note = "Publisher Copyright: {\textcopyright} 2017 International Astronomical Union.",

year = "2016",

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doi = "10.1017/S1743921317000709",

language = "English",

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pages = "293--297",

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T1 - The halo of M49 and its environment as traced by planetary nebulae

AU - Hartke, Johanna

AU - Arnaboldi, Magda

AU - Longobardi, Alessia

AU - Gerhard, Ortwin

AU - Freeman, Ken

AU - Okamura, Sadanori

PY - 2016/10/1

Y1 - 2016/10/1

N2 - We investigate the stellar halo of the nearby elliptical Virgo-cluster galaxy M49 using Planetary Nebulae (PNe). M49 is the second-brightest galaxy of the Virgo cluster and is at the center of the Virgo subcluster B. We present an extended catalogue extracted from a narrow-band survey carried out with Subaru's Suprime Cam, consisting of 735 PNe down to a limiting magnitude of m5007 = 29.3. This PNe population traces the halo out to 155 kpc from the galaxy's center, which provides accurate measurement of the luminosity-specific PN-number (α-parameter) in the inner and outer regions of M49's halo. We are also able to determine the morphological variation of the planetary nebulae luminosity function (PNLF), that may trace different parent stellar populations. This enables us to identify the transition from the PN-scarce, possibly metal-rich, galaxy halo to the PN-rich, metal-poor, outer component.

AB - We investigate the stellar halo of the nearby elliptical Virgo-cluster galaxy M49 using Planetary Nebulae (PNe). M49 is the second-brightest galaxy of the Virgo cluster and is at the center of the Virgo subcluster B. We present an extended catalogue extracted from a narrow-band survey carried out with Subaru's Suprime Cam, consisting of 735 PNe down to a limiting magnitude of m5007 = 29.3. This PNe population traces the halo out to 155 kpc from the galaxy's center, which provides accurate measurement of the luminosity-specific PN-number (α-parameter) in the inner and outer regions of M49's halo. We are also able to determine the morphological variation of the planetary nebulae luminosity function (PNLF), that may trace different parent stellar populations. This enables us to identify the transition from the PN-scarce, possibly metal-rich, galaxy halo to the PN-rich, metal-poor, outer component.

KW - cD

KW - galaxies: clusters: individual (Virgo)

KW - galaxies: elliptical and lenticular

KW - galaxies: individual (M49)

KW - planetary nebulae: general

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U2 - 10.1017/S1743921317000709

DO - 10.1017/S1743921317000709

M3 - Article

AN - SCOPUS:85047106800

SN - 1743-9213

VL - 12

SP - 293

EP - 297

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S323

ER -

The halo of M49 and its environment as traced by planetary nebulae

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