Evidence for an interaction between the Galactic Center clouds M0.10-0.08 and M0.11-0.11

Abstract

We present high-resolution (~2-3"; ~0.1 pc) radio observations of the Galactic center cloud M0.10-0.08 using the Very Large Array at K and Ka band (~25 and 36 GHz). The M0.10-0.08 cloud is located in a complex environment near the Galactic center Radio Arc and the adjacent M0.11-0.11 molecular cloud. From our data, M0.10-0.08 appears to be a compact molecular cloud (~3 pc) that contains multiple compact molecular cores (5+; <0.4 pc). In this study we detect a total of 15 molecular transitions in M0.10-0.08 from the following molecules: NH3, HC3N, CH3OH, HC5N, CH3CN, and OCS. We have identified more than sixty 36 GHz CH3OH masers in M0.10-0.08 with brightness temperatures above 400 K and 31 maser candidates with temperatures between 100-400 K. We conduct a kinematic analysis of the gas using NH3 and detect multiple velocity components towards this region of the Galactic center. The bulk of the gas in this region has a velocity of 51.5 km/s (M0.10-0.08) with a lower velocity wing at 37.6 km/s. We also detect a relatively faint velocity component at 10.6 km/s that we attribute to being an extension of the M0.11-0.11 cloud. Analysis of the gas kinematics, combined with past X-ray fluorescence observations, suggests M0.10-0.08 and M0.11-0.11 are located in the same vicinity of the Galactic center and could be physically interacting.

arXiv commentAccepted for publication in the Astrophysical Journal

References in corpus (34)

• Hi-GAL: the Herschel infrared Galactic Plane Survey
• Relativistic redshift of the star S0-2 orbiting the Galactic center supermassive black hole
• A 100-parsec elliptical and twisted ring of cold and dense molecular clouds revealed by Herschel around the Galactic Center
• The dynamical evolution of molecular clouds near the Galactic Centre - I. Orbital structure and evolutionary timeline
• Dense gas in the Galactic central molecular zone is warm and heated by turbulence
• Molecular gas kinematics within the central 250 pc of the Milky Way
• Spectral imaging of the Central Molecular Zone in multiple 3-mm molecular lines
• Discovery of a superluminal Fe K echo at the Galactic Center: The glorious past of Sgr A* preserved by molecular clouds
• Do cloud-cloud collisions trigger high-mass star formation? I. Small cloud collisions
• Isolating signatures of major cloud-cloud collisions using position-velocity diagrams
• The Galactic Center Molecular Cloud Survey. I. A Steep Linewidth-Size Relation & Suppression of Star Formation
• Equivalent width, shape and proper motion of the iron fluorescent line emission from the molecular clouds as an indicator of the illuminating source X-ray flux history
• A Molecular Face-on View of the Galactic Centre Region
• Echoes of multiple outbursts of Sagittarius A* revealed by Chandra
• The two molecular clouds in RCW 38; evidence for formation of the youngest super star cluster in the Milky Way triggered by cloud-cloud collision
• Triggered O star formation in M20 via cloud-cloud collision: Comparisons between high-resolution CO observations and simulations
• pyspeckit: A spectroscopic analysis and plotting package
• The Survey of Water and Ammonia in the Galactic Center (SWAG): Molecular Cloud Evolution in the Central Molecular Zone
• Detection of Widespread Hot Ammonia in the Galactic Center
• Widespread Methanol Emission from the Galactic Center
• CMZoom: Survey Overview and First Data Release
• Abundant Methanol Masers but no New Evidence for Star Formation in GCM0.253+0.016
• The Dense Gas Fraction in Galactic Center Clouds
• Thermal SiO and H${}^{13}$CO${}^{+}$ Line Observations of the Dense Molecular Cloud G0.11$-$0.11 in the Galactic Center region
• Expanded VLA Detection of 36.2 GHz Class I Methanol Masers in Sagittarius A
• An X-ray survey of the central molecular zone: variability of the Fe Ka emission line
• The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center
• Origins of Scatter in the Relationship Between HCN 1-0 and Dense Gas Mass in the Galactic Center
• Interstellar gas in the Galaxy and the X-ray luminosity of Sgr A* in the recent past
• CMZoom II: Catalog of Compact Submillimeter Dust Continuum Sources in the Milky Way's Central Molecular Zone
• M0.20-0.033: An Expanding Molecular Shell in the Galactic Center Radio Arc
• A Large--Scale Spectroscopic Survey of Methanol and OH Line Emission from the Galactic Center: Observations and Data
• Discovery of 14NH3 (2,2) maser emission in Sgr B2-Main
• The Unusual Galactic Center Radio Source N3

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• SOFIA/HAWC+ Far-Infrared Polarimetric Large-Area CMZ Exploration (FIREPLACE) Survey III: Full Survey Data Set
• 25 years of XMM-Newton observations of the Sgr A complex: 3D distribution and internal structure of the clouds