Gemini Follow-up of Two Massive H I Clouds Discovered with the Australian Square Kilometer Array Pathfinder

Juan P. Madrid; Karen Lee-Waddell; Paolo Serra; Bärbel S. Koribalski; Mischa Schirmer; Kristine Spekkens; Jing Wang

doi:10.3847/2041-8213/aaaa1d

Gemini Follow-up of Two Massive H I Clouds Discovered with the Australian Square Kilometer Array Pathfinder

Juan P. Madrid, Karen Lee-Waddell, Paolo Serra, Bärbel S. Koribalski, Mischa Schirmer, Kristine Spekkens, Jing Wang

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Using the Gemini Multi Object Spectrograph (GMOS) we search for optical counterparts of two massive (∼109 M ⊙) neutral hydrogen clouds near the spiral galaxy IC 5270, located in the outskirts of the IC 1459 group. These two H I clouds were recently discovered using the Australian Square Kilometer Array Pathfinder (ASKAP). Two low surface brightness optical counterparts to one of these H I clouds are identified in the new Gemini data that reaches down to magnitudes of ∼27.5 mag in the g-band. The observed H I mass-to-light ratio derived with these new data, {M}{{H}{{I}}}/{L}g=242, is among the highest reported to date. We are also able to rule out that the two H I clouds are dwarf companions of IC 5270. Tidal interactions and ram pressure stripping are plausible explanations for the physical origin of these two clouds.

Original language	English
Journal	The Astrophysical Journal Letters
Volume	854
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/aaaa1d
Publication status	Published - 1 Feb 2018
Externally published	Yes

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10.3847/2041-8213/aaaa1d

https://arxiv.org/abs/1802.05279

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title = "Gemini Follow-up of Two Massive H I Clouds Discovered with the Australian Square Kilometer Array Pathfinder",

abstract = "Using the Gemini Multi Object Spectrograph (GMOS) we search for optical counterparts of two massive (∼109 M ⊙) neutral hydrogen clouds near the spiral galaxy IC 5270, located in the outskirts of the IC 1459 group. These two H I clouds were recently discovered using the Australian Square Kilometer Array Pathfinder (ASKAP). Two low surface brightness optical counterparts to one of these H I clouds are identified in the new Gemini data that reaches down to magnitudes of ∼27.5 mag in the g-band. The observed H I mass-to-light ratio derived with these new data, {M}{{H}{{I}}}/{L}g=242, is among the highest reported to date. We are also able to rule out that the two H I clouds are dwarf companions of IC 5270. Tidal interactions and ram pressure stripping are plausible explanations for the physical origin of these two clouds.",

keywords = "galaxies: evolution, galaxies: groups: individual: IC 1459, galaxies: individual: IC 5270, stars: formation",

author = "Madrid, {Juan P.} and Karen Lee-Waddell and Paolo Serra and Koribalski, {B{\"a}rbel S.} and Mischa Schirmer and Kristine Spekkens and Jing Wang",

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month = feb,

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doi = "10.3847/2041-8213/aaaa1d",

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TY - JOUR

T1 - Gemini Follow-up of Two Massive H I Clouds Discovered with the Australian Square Kilometer Array Pathfinder

AU - Madrid, Juan P.

AU - Lee-Waddell, Karen

AU - Serra, Paolo

AU - Koribalski, Bärbel S.

AU - Schirmer, Mischa

AU - Spekkens, Kristine

AU - Wang, Jing

PY - 2018/2/1

Y1 - 2018/2/1

N2 - Using the Gemini Multi Object Spectrograph (GMOS) we search for optical counterparts of two massive (∼109 M ⊙) neutral hydrogen clouds near the spiral galaxy IC 5270, located in the outskirts of the IC 1459 group. These two H I clouds were recently discovered using the Australian Square Kilometer Array Pathfinder (ASKAP). Two low surface brightness optical counterparts to one of these H I clouds are identified in the new Gemini data that reaches down to magnitudes of ∼27.5 mag in the g-band. The observed H I mass-to-light ratio derived with these new data, {M}{{H}{{I}}}/{L}g=242, is among the highest reported to date. We are also able to rule out that the two H I clouds are dwarf companions of IC 5270. Tidal interactions and ram pressure stripping are plausible explanations for the physical origin of these two clouds.

AB - Using the Gemini Multi Object Spectrograph (GMOS) we search for optical counterparts of two massive (∼109 M ⊙) neutral hydrogen clouds near the spiral galaxy IC 5270, located in the outskirts of the IC 1459 group. These two H I clouds were recently discovered using the Australian Square Kilometer Array Pathfinder (ASKAP). Two low surface brightness optical counterparts to one of these H I clouds are identified in the new Gemini data that reaches down to magnitudes of ∼27.5 mag in the g-band. The observed H I mass-to-light ratio derived with these new data, {M}{{H}{{I}}}/{L}g=242, is among the highest reported to date. We are also able to rule out that the two H I clouds are dwarf companions of IC 5270. Tidal interactions and ram pressure stripping are plausible explanations for the physical origin of these two clouds.

KW - galaxies: evolution

KW - galaxies: groups: individual: IC 1459

KW - galaxies: individual: IC 5270

KW - stars: formation

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DO - 10.3847/2041-8213/aaaa1d

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VL - 854

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

SN - 2041-8205

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