The Discovery of a New Massive Molecular Gas Component Associated with the Submillimeter Galaxy SMM J02399-0136

Abstract

We present CO(1-0), CO(3-2), and CO(7-6) observations using the Green Bank Telescope (GBT) and the Atacama Large Millimeter Array (ALMA) of the z=2.8 sub-millimeter galaxy SMM J02399-0136. This was the first submillimeter-selected galaxy discovered and remains an archetype of the class, comprising a merger of several massive and active components, including a quasar-luminosity AGN and a highly obscured, gas-rich starburst spread over a ~25 kpc extent. The GBT CO(1-0) line profile is comprised of two distinct velocity components separated by about 600 km/s and suggests the presence of a new component of molecular gas that had not been previously identified. The CO(3-2) observations with ALMA show that this new component, designated W1, is associated with a large extended structure stretching 13 kpc westward from the AGN. W1 is not detected in the ALMA CO(7-6) data implying that this gas has much lower CO excitation than the central starburst regions which are bright in CO(7-6). The molecular gas mass of W1 is about 30% of the total molecular gas mass in the system, depending on the CO--to--H_2 conversion factor. W1 is arguably a merger remnant; alternatively, it could be a massive molecular outflow associated with the AGN, or perhaps inflowing metal-enriched molecular gas fueling the ongoing activity.

10 pages, 8 figures. Accepted for publication in ApJ 2018.05.11

References in corpus (16)

• The Frontier Fields: Survey Design
• Intense Star Formation within Resolved Compact Regions in a Galaxy at z=2.3
• The Green Bank Ammonia Survey (GAS): First Results of NH3 mapping the Gould Belt
• Molecular Gas in the Halo Fuels the Growth of a Massive Cluster Galaxy at High Redshift
• The Role of Galactic Winds on Molecular Gas Emission from Galaxy Mergers
• Molecular gas in low-metallicity starburst galaxies: Scaling relations and the CO-to-H${}_2$ conversion factor
• Evolution of the atomic and molecular gas content of galaxies in dark matter haloes
• A Survey of the Molecular ISM Properties of Nearby Galaxies using the Herschel FTS
• High-J CO SLEDs in nearby infrared bright galaxies observed by Herschel-PACS
• Giant galaxy growing from recycled gas: ALMA maps the circumgalactic molecular medium of the Spiderweb in [CI]
• First Detection of the [OIII] 88 micron Line at High Redshifts: Characterizing the Starburst and Narrow Line Regions in Extreme Luminosity Systems
• Observing Cold Gas in Submillimeter Galaxies: Detection of CO(1-0) Emission in SMM J13120+4242 with the Green Bank Telescope
• VLA imaging of 12CO J=1-0 and free-free emission in lensed submillimetre galaxies
• Physical conditions of molecular gas in the Circinus galaxy: Multi-J CO and CI 1-0 observations
• Total Molecular Gas Masses of Planck - Herschel Selected Strongly Lensed Hyper Luminous Infrared Galaxies
• The combined effect of AGN and supernovae feedback in launching massive molecular outflows in high-redshift galaxies

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