J/ApJ/886/61 OGLE-III, MCPS and HST VI obs. of LMC & SMC (Yuan+, 2019)
Consistent calibration of the tip of the red giant branch in the Large
Magellanic Cloud on the Hubble Space Telescope photometric system and a
redetermination of the Hubble constant.
Yuan W., Riess A.G., Macri L.M., Casertano S., Scolnic D.M.
<Astrophys. J., 886, 61 (2019)>
=2019ApJ...886...61Y 2019ApJ...886...61Y
ADC_Keywords: Magellanic Clouds; Stars, giant; Photometry, HST; Photometry, VRI
Keywords: Distance indicators ; Cosmology ; Large Magellanic Cloud ;
Hubble Space Telescope ; Small Magellanic Cloud
Abstract:
We present a calibration of the tip of the red giant branch (TRGB) in
the Large Magellanic Cloud (LMC) on the Hubble Space Telescope
(HST)/ACS F814W system. We use archival HST observations to derive
blending corrections and photometric transformations for two
ground-based wide-area imaging surveys of the Magellanic Clouds. We
show that these surveys are biased bright by up to ∼0.1mag in the
optical due to blending, and that the bias is a function of local
stellar density. We correct the LMC TRGB magnitudes from
Jang & Lee (2017ApJ...835...28J 2017ApJ...835...28J) and use the geometric distance from
Pietrzynski+ (2019Natur.567..200P 2019Natur.567..200P) to obtain an absolute TRGB
magnitude of MF814W=-3.97±0.046mag. Applying this calibration to
the TRGB magnitudes from Freedman+ (2019ApJ...882...34F 2019ApJ...882...34F) in SN Ia
hosts yields a value for the Hubble constant of
H0=72.4±2.0km/s/Mpc for their TRGB+SNe Ia distance ladder. The
difference in the TRGB calibration and the value of H0 derived here
and by Freedman+ primarily results from their overestimate of the LMC
extinction, caused by inconsistencies in their different sources of
TRGB photometry for the Magellanic Clouds. Using the same source of
photometry (OGLE) for both Clouds and applying the aforementioned
corrections yields a value for the LMC I-band TRGB extinction that is
lower by 0.06mag, consistent with independent OGLE reddening maps
used by us and by Jang & Lee to calibrate TRGB and determine H0.
Description:
In order to obtain the ground-to-HST correction for the tip of the red
giant branch (TRGB) in the Large Magellanic Cloud (LMC), we analyzed
two commonly used ground-based photometric catalogs, OGLE-III
(Udalski+ 2008AcA....58...89U 2008AcA....58...89U) and the Magellanic Clouds Photometric
Survey (MCPS; Zaritsky+ 2004, J/AJ/128/1606), as well as archival HST
observations of 12 LMC fields that are covered by these ground-based
surveys.
We used MAST to retrieve archival HST ACS F814W and F555W observations
(spanning 2003 Aug 8 to 2004 Jun 2) of 13 fields that are covered by
the aforementioned ground surveys. These fields are centered on
globular clusters NGC 1755, 1756, 1801, 1854, 1858, 1872, 1903, 1943,
1953, 1983, 2010, 2056, and 2107, but the majority of each frame
covers non-cluster stars. We found the image quality of NGC 1983 is
noticeably worse than the rest of the fields and thus excluded it from
the analysis.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 43 13 Summary of HST observations
table2.dat 61 3005 HST photometry for 12 LMC fields
table6.dat 46 1257 SMC tip of the red giant branch (TRGB)-like stars
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See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
II/322 : OGLE-III. Magellanic Clouds stellar proper motions (Poleski+, 2012)
II/351 : VISTA Magellanic Survey (VMC) catalog (Cioni+, 2011)
J/AcA/49/223 : BVI photometry of OGLE LMC Cepheids (Udalski+, 1999)
J/AcA/49/437 : BVI photometry of OGLE SMC Cepheids (Udalski+, 1999)
J/PASP/111/812 : V(RI)C Phot of Cepheids in Magellanic Clouds (Barnes+ 1999)
J/AJ/123/3216 : BV photometry of variable stars in SMC (Sharpee+, 2002)
J/AJ/123/855 : Magellanic Clouds Photometric Survey: the SMC (Zaritsky+, 2002)
J/AJ/128/1606 : Magellanic Clouds Phot. Survey (MCPS): LMC (Zaritsky+, 2004)
J/MNRAS/353/705 : OGLE Variables in Magellanic Clouds (Ita+, 2004)
J/MNRAS/361/1055 : BVI photometry of LMC Be stars (Sabogal+, 2005)
J/A+A/430/421 : Reddening in LMC bar region (Subramaniam, 2005)
J/AJ/131/407 : BV photometry of stars in the LMC (Kaluzny+, 2006)
J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)
J/AcA/59/239 : VI light curves of LMC long-period variables (Soszynski+, 2009)
J/AcA/59/1 : VI light curves of LMC RR Lyrae stars (Soszynski+, 2009)
J/AcA/61/199 : OGLE3 Magellanic Clouds High PM stars (Poleski+, 2011)
J/ApJ/730/119 : HST/WFC3 observations of Cepheids in SN Ia hosts (Riess+, 2011)
J/AJ/142/61 : RGB stars in LMC outer disk (Carrera+, 2011)
J/AcA/63/159 : LMC OGLE-III Shallow Survey variable stars (Ulaczyk+, 2013)
J/AJ/149/117 : LMC infrared survey. I. Photometry of Cepheids (Macri+, 2015)
J/AcA/65/297 : OGLE4 LMC and SMC Cepheids (Soszynski+, 2015)
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/AJ/153/154 : LMC NIR survey. IV. Type II Cepheid variables (Bhardwaj+, 2017)
J/ApJ/845/146 : The Carnegie-Chicago Hubble Program. II. IC 1613 (Hatt+, 2017)
J/AJ/154/149 : LMC NIR synoptic survey. V. NIR phot. of Miras (Yuan+, 2017)
J/ApJ/860/1 : Radial velocity measurements of 20 EBs in LMC (Graczyk+, 2018)
J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Field [1755/2107] NGC number
6- 16 A11 "date" Date Date of observation (UT)
18- 25 F8.5 deg RAdeg [73.7/85.9] Right ascension (J2000)
27- 35 F9.5 deg DEdeg [-70.9/-68.2] Declination (J2000)
37- 39 I3 s ExpV [20/170] F555W exposure time
41- 43 I3 s ExpI [20/120] F814W exposure time
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 1 A1 --- --- [n]
2- 5 I4 --- Field NGC identifier for HST fields
7- 14 I8 --- ID [1000160/13086534] Internal photometry ID
16- 24 F9.6 deg RAdeg [73.66/85.95] Right ascension (J2000) (1)
26- 35 F10.6 deg DEdeg [-70.86/-68.16] Declination (J2000) (1)
37- 42 F6.3 mag F814Wmag [14.49/17.5] HST/ACS F814W magnitude (2)
44- 48 F5.3 mag e_F814Wmag [0.001/0.05] 1σ uncertainty in F814Wmag
50- 55 F6.3 mag F555Wmag [14.3/24.3] HST/ACS F555W magnitude
57- 61 F5.3 mag e_F555Wmag [0.001/0.3] 1σ uncertainty in F555Wmag
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Note (1): Based on the OGLE catalog.
Note (2): Only list unsaturated sources with F814W<17.5mag
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 8 F8.5 deg RAdeg [5.77/20.11] Right ascension (J2000)
10- 18 F9.5 deg DEdeg [-74.8/-71.26] Declination (J2000)
20- 25 F6.3 mag V-OGLE [16.26/16.82] OGLE V magnitude
27- 32 F6.3 mag I-OGLE [14.85/15.05] OGLE I magnitude
34- 39 F6.3 mag V-MCPS [15.4/20.01] MCPS V magnitude
41- 46 F6.3 mag I-MCPS [14.3/15.7] MCPS I magnitude
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 09-Apr-2021