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The Astrophysical Distance Scale. III. Distance to the Local Group Galaxy WLM Using Multiwavelength Observations of the Tip of the Red Giant Branch, Cepheids, and JAGB Stars

Abigail J. Lee, Wendy L. Freedman, Barry F. Madore, Kayla A. Owens, Andrew J. Monson, Taylor J. Hoyt

2021The Astrophysical Journal31 citationsDOIOpen Access PDF

Abstract

Abstract The local determination of the Hubble constant sits at a crossroad. Current estimates of the local expansion rate of the universe differ by about 1.7 σ , derived from the Cepheid- and TRGB-based calibrations, applied to Type Ia supernovae. To help elucidate possible sources of systematic error causing the tension, we show in this study the recently developed distance indicator, the J-region Asymptotic Giant Branch (JAGB) method, can serve as an independent cross-check and comparison with other local distance indicators. Furthermore, we make the case that the JAGB method has substantial potential as an independent, precise, and accurate calibrator of Type Ia supernovae for the determination of H 0 . Using the Local Group galaxy Wolf–Lundmark–Melotte (WLM), we present distance comparisons between the JAGB method, a TRGB measurement at near-infrared ( JHK ) wavelengths, a TRGB measurement in the optical I band, and a multiwavelength Cepheid period–luminosity relation determination. We find <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mtable> <mml:mtr> <mml:mtd columnalign="right"> <mml:msub> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:mspace width="0.25em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>JAGB</mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:mtd> <mml:mtd columnalign="center"> <mml:mo>=</mml:mo> </mml:mtd> <mml:mtd columnalign="left"> <mml:mn>24.97</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.02</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>stat</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mo>±</mml:mo> <mml:mn>0.04</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>sys</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mspace width="0.33em"/> <mml:mi>mag</mml:mi> </mml:mtd> </mml:mtr> <mml:mtr> <mml:mtd columnalign="right"> <mml:msub> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:mspace width="0.25em"/> <mml:mo stretchy="false">(</mml:mo> <mml:msub> <mml:mrow> <mml:mi>TRGB</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>NIR</mml:mi> </mml:mrow> </mml:msub> <mml:mo stretchy="false">)</mml:mo> </mml:mtd> <mml:mtd columnalign="center"> <mml:mo>=</mml:mo> </mml:mtd> <mml:mtd columnalign="left"> <mml:mn>24.98</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.04</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>stat</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mo>±</mml:mo> <mml:mn>0.07</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>sys</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mspace width="0.33em"/> <mml:mi>mag</mml:mi> </mml:mtd> </mml:mtr> <mml:mtr> <mml:mtd columnalign="right"> <mml:msub> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:mspace width="0.25em"/> <mml:mo stretchy="false">(</mml:mo> <mml:msub> <mml:mrow> <mml:mi>TRGB</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">F</mml:mi> <mml:mn>814</mml:mn> <mml:mi mathvariant="normal">W</mml:mi> </mml:mrow> </mml:msub> <mml:mo stretchy="false">)</mml:mo> </mml:mtd> <mml:mtd columnalign="center"> <mml:mo>=</mml:mo> </mml:mtd> <mml:mtd columnalign="left"> <mml:mn>24.93</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.02</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>stat</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mo>±</mml:mo> <mml:mn>0.06</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>sys</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mspace width="0.33em"/> <mml:mi>mag</mml:mi> </mml:mtd> </mml:mtr> <mml:mtr> <mml:mtd columnalign="right"> <mml:msub> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:mspace width="0.25em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>Cepheids</mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:mtd> <mml:mtd columnalign="center"> <mml:mo>=</mml:mo> </mml:mtd> <mml:mtd columnalign="left"> <mml:mn>24.98</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.03</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>stat</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mo>±</mml:mo> <mml:mn>0.04</mml:mn> <mml:mspace width="0.33em"/> <mml:mo stretchy="false">(</mml:mo> <mml:mi>sys</mml:mi>

Topics & Concepts

PhysicsLocal GroupCepheid variableAstrophysicsRed-giant branchHubble's lawGalaxySupernovaCosmic distance ladderStarsAstronomyMetric expansion of spaceCosmologyPeculiar velocityUniverseIrregular galaxyLarge Magellanic CloudSpiral galaxyDistance measuresType (biology)Distance modulusRed clumpH II regionRed shiftGalaxy groupAsymptotic giant branchGiant starVariable starRed giantObservational cosmologyAstronomy and Astrophysical ResearchGamma-ray bursts and supernovaeGalaxies: Formation, Evolution, Phenomena
The Astrophysical Distance Scale. III. Distance to the Local Group Galaxy WLM Using Multiwavelength Observations of the Tip of the Red Giant Branch, Cepheids, and JAGB Stars | Litcius