Distorted H I gas in the widely separated luminous infrared galaxy ARP 256

Jacqueline Chen; K. Y. Lo; Robert A. Gruendl; Miao Ling Peng; Yu Gao

doi:10.1086/338311

Distorted H I gas in the widely separated luminous infrared galaxy ARP 256

Jacqueline Chen, K. Y. Lo, Robert A. Gruendl, Miao Ling Peng, Yu Gao

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

Abstract

We present new interferometric H I and CO (J = 1→0) observations of the luminous infrared source, Arp 256. Arp 256 consists of two spiral galaxies in an early stage of merging, with a projected nuclear separation of 29 kpc (54″) and an infrared luminosity of 2.0 × 10¹¹ L _⊙. Despite the large separation of the galaxies' nuclei and mildly disrupted stellar components, the H I disks are found to be strongly disrupted, and the southern galaxy in Arp 256 shows an elevated star formation efficiency, which is consistent with a nuclear starburst. Both of these results run contrary to expectations, posing interesting questions about the physical mechanisms involved in stimulating star formation during an interaction.

Original language	English (US)
Pages (from-to)	720-728
Number of pages	9
Journal	Astronomical Journal
Volume	123
Issue number	2 1754
DOIs	https://doi.org/10.1086/338311
State	Published - Feb 2002

Keywords

Galaxies: individual (Arp 256)
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: starburst

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Online availability

10.1086/338311

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title = "Distorted H I gas in the widely separated luminous infrared galaxy ARP 256",

abstract = "We present new interferometric H I and CO (J = 1→0) observations of the luminous infrared source, Arp 256. Arp 256 consists of two spiral galaxies in an early stage of merging, with a projected nuclear separation of 29 kpc (54″) and an infrared luminosity of 2.0 × 1011 L ⊙. Despite the large separation of the galaxies' nuclei and mildly disrupted stellar components, the H I disks are found to be strongly disrupted, and the southern galaxy in Arp 256 shows an elevated star formation efficiency, which is consistent with a nuclear starburst. Both of these results run contrary to expectations, posing interesting questions about the physical mechanisms involved in stimulating star formation during an interaction.",

keywords = "Galaxies: individual (Arp 256), Galaxies: interactions, Galaxies: kinematics and dynamics, Galaxies: starburst",

author = "Jacqueline Chen and Lo, {K. Y.} and Gruendl, {Robert A.} and Peng, {Miao Ling} and Yu Gao",

year = "2002",

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doi = "10.1086/338311",

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volume = "123",

pages = "720--728",

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publisher = "American Astronomical Society",

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T1 - Distorted H I gas in the widely separated luminous infrared galaxy ARP 256

AU - Chen, Jacqueline

AU - Lo, K. Y.

AU - Gruendl, Robert A.

AU - Peng, Miao Ling

AU - Gao, Yu

PY - 2002/2

Y1 - 2002/2

N2 - We present new interferometric H I and CO (J = 1→0) observations of the luminous infrared source, Arp 256. Arp 256 consists of two spiral galaxies in an early stage of merging, with a projected nuclear separation of 29 kpc (54″) and an infrared luminosity of 2.0 × 1011 L ⊙. Despite the large separation of the galaxies' nuclei and mildly disrupted stellar components, the H I disks are found to be strongly disrupted, and the southern galaxy in Arp 256 shows an elevated star formation efficiency, which is consistent with a nuclear starburst. Both of these results run contrary to expectations, posing interesting questions about the physical mechanisms involved in stimulating star formation during an interaction.

AB - We present new interferometric H I and CO (J = 1→0) observations of the luminous infrared source, Arp 256. Arp 256 consists of two spiral galaxies in an early stage of merging, with a projected nuclear separation of 29 kpc (54″) and an infrared luminosity of 2.0 × 1011 L ⊙. Despite the large separation of the galaxies' nuclei and mildly disrupted stellar components, the H I disks are found to be strongly disrupted, and the southern galaxy in Arp 256 shows an elevated star formation efficiency, which is consistent with a nuclear starburst. Both of these results run contrary to expectations, posing interesting questions about the physical mechanisms involved in stimulating star formation during an interaction.

KW - Galaxies: individual (Arp 256)

KW - Galaxies: interactions

KW - Galaxies: kinematics and dynamics

KW - Galaxies: starburst

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IS - 2 1754

ER -

Distorted H I gas in the widely separated luminous infrared galaxy ARP 256

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