Stellar haloes outshine disc truncations in low-inclined spirals

Stellar haloes outshine disc truncations in low-inclined spirals

The absence of stellar disc truncations in low-inclined spiral galaxies has been a matter of debate in the last decade. Disc truncations are often observed in highly inclined galaxies but no obvious detection of this feature has so far been made in face-on spirals. Here we show, using a simple expon...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2014-07, Vol.441 (4), p.2809-2814
Hauptverfasser: Martín-Navarro, Ignacio, Trujillo, Ignacio, Knapen, Johan H., Bakos, Judit, Fliri, Jürgen
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container_end_page 2814
container_issue 4
container_start_page 2809
container_title Monthly notices of the Royal Astronomical Society
container_volume 441
creator Martín-Navarro, Ignacio
Trujillo, Ignacio
Knapen, Johan H.
Bakos, Judit
Fliri, Jürgen
description The absence of stellar disc truncations in low-inclined spiral galaxies has been a matter of debate in the last decade. Disc truncations are often observed in highly inclined galaxies but no obvious detection of this feature has so far been made in face-on spirals. Here we show, using a simple exponential disc plus stellar halo model based on current observational constraints, that truncations in face-on projections occur at surface brightness levels comparable to the brightness of stellar haloes at the same radial distance. In this sense, stellar haloes outshine the galaxy disc at the expected position of the truncations, forcing their studies only in highly inclined (edge-on) orientations.
doi_str_mv 10.1093/mnras/stu767
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Stars & galaxies
title Stellar haloes outshine disc truncations in low-inclined spirals
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