Extinction in the Large Magellanic Cloud

Abstract

We present an extinction map of the Large Magellanic Cloud (LMC), using 204,502 stars from the Two Micron All Sky Survey point source catalog. We first use the NICE method to determine the reddening distribution, \ehk and \ejh, which we compare to the HI distribution to find a near-infrared reddening law of $\ejh/\ehk=1.20\pm 0.04$. A visual extinction map ($\sim 6^{\circ }\times 6^{\circ }$) of the LMC is created using the NICER method; at 4 arcmin resolution, a mean value of $\av=0.38$ mag is found. We derive the LMC CO-to-H${}_2$ conversion factor, $\x{LMC}$, independent of assumptions about the virialization of giant molecular clouds, by comparing the NICER extinction map with NANTEN ${}^{12}$CO observations. In regions where $\av>1$ mag and ${}^{12}$CO emission is $\ge$ 2 \counits, we measure $\x{LMC}=9.3\pm 0.4\times 10^{20} \xunits$. In the same regions, the LMC contains a total molecular mass of $(4.5\pm 0.2)\times 10^7 \msun$.

18 pages, 15 figures

References in corpus (1)

• 2MASS wide field extinction maps - I. The Pipe nebula

Cited by in corpus (42)

• The Resolved Properties of Extragalactic Giant Molecular Clouds
• Lifting the Dusty Veil With Near- and Mid-Infrared Photometry: I. Description and Applications of the Rayleigh-Jeans Color Excess Method
• Star clusters near and far; tracing star formation across cosmic time
• SDSS-IV MaNGA: What Shapes The Distribution Of Metals In Galaxies? Exploring The Roles Of The Local Gas Fraction And Escape Velocity
• The Persistence of Memory, or How the X-Ray Spectrum of SNR 0509-67.5 Reveals the Brightness of its Parent Type Ia Supernova
• Molecular and Atomic Gas in the Large Magellanic Cloud II. Three-dimensional Correlation between CO and HI
• Gaia DR3: Apsis III -- Non-stellar content and source classification
• Feedback from massive stars at low metallicities: MUSE observations of N44 and N180 in the Large Magellanic Cloud
• Period-Luminosity Relations Derived from the OGLE-III Fundamental Mode Cepheids
• The Close Binary Properties of Massive Stars in the Milky Way and Low-Metallicity Magellanic Clouds
• Mass and p-factor of the type II Cepheid OGLE-LMC-T2CEP-098 in a binary system
• Testing models for molecular gas formation in galaxies: hydrostatic pressure or gas and dust shielding?
• Masers associated with high-mass star formation regions in the Large Magellanic Cloud
• Molecular and Atomic Gas in the Large Magellanic Cloud - I. Conditions for CO Detection
• Towards a deeper understanding of the physics driving galaxy quenching -- inferring trends in the gas content via extinction
• Asteroseismology of luminous red giants with Kepler I: Long Period Variables with radial and non-radial modes
• The Araucaria Project: The First-Overtone Classical Cepheid in the Eclipsing System OGLE-LMC-CEP-2532
• The Mid-Infrared Extinction Law in the Large Magellanic Cloud
• A Light Curve Analysis of 32 Recent Galactic Novae --- Distances and White Dwarf Masses
• Warm and Dense Molecular Gas in the N159 Region: 12CO J=4-3 and 13CO J=3-2 Observations with NANTEN2 and ASTE
• The Influence of Far-Ultraviolet Radiation on the Properties of Molecular Clouds in the 30 Dor Region of the Large Magellanic Cloud
• On the Recovery of the Star Formation History of the LMC from the VISTA Survey of the Magellanic System
• A Light Curve Analysis of Recurrent and Very Fast Novae in our Galaxy, Magellanic Clouds, and M31
• Red supergiant stars in the Large Magellanic Cloud. II. Infrared properties and mid-infrared variability
• The Araucaria Project: A study of the classical Cepheid in the eclipsing binary system OGLE LMC562.05.9009 in the Large Magellanic Cloud
• The Molecular Ridge Close to 30 Doradus in the Large Magellanic Cloud
• Photometric and Spectroscopic Properties of Novae in the Large Magellanic Cloud
• Spitzer Characterization of Dust in the Ionized Medium of the Large Magellanic Cloud
• Broad-band Spectroscopy of the Ongoing Large Eruption of the Luminous Blue Variable R71
• Orbital and Superorbital Monitoring of the Be/X-ray binary A0538-66: constraints on the system parameters
• ANIR : Atacama Near-Infrared Camera for the 1.0-m miniTAO Telescope
• The Parsec-Scale Relationship Between I_CO and A_V in Local Molecular Clouds
• Three-Dimensional Structure and Dust Extinction in the Small Magellanic Cloud
• The Properties of the Large Magellanic Cloud Based on OGLE III Photometry of RR Lyrae Stars
• The $UBV$ Color Evolution of Classical Novae. III. Time-Stretched Color-Magnitude Diagram of Novae in Outburst
• The dynamical mass and evolutionary status of the type-II Cepheid in the eclipsing binary system OGLE-LMC-T2CEP-211 with a double-ring disk
• Extinction and dust/gas ratio in the H I ridge region of the LMC based on the IRSF/SIRIUS near-infrared survey
• Detection of new eruptions in the Magellanic Clouds LBVs R 40 and R 110
• Rethinking a Mysterious Molecular Cloud
• ASASSN-16oh: A nova outburst with no mass ejection -- A new type of supersoft X-ray source in old populations
• Three-dimensional dust geometry of the LMC HI ridge region as revealed by the IRSF/SIRIUS survey
• ALMA Observations of the Molecular Clouds in NGC 625