J/ApJ/946/43 Spectroscopic RSG stars in the MCs from APOGEE & Gaia (Wang+, 2023)
The optical to infrared extinction law of Magellanic Clouds based on red
supergiants and classical Cepheids.
Wang S., Chen X.
<Astrophys. J., 946, 43 (2023)>
=2023ApJ...946...43W 2023ApJ...946...43W
ADC_Keywords: Stars, giant; Spectra, infrared; Photometry; Optical; Surveys;
Magellanic Clouds; Extinction; Abundances
Keywords: Interstellar reddening ; Interstellar dust extinction ;
Reddening law ; Interstellar extinction ; Red supergiant stars ;
Large Magellanic Cloud ; Small Magellanic Cloud ; Magellanic Clouds
Abstract:
Precise interstellar dust extinction laws are important to infer the
intrinsic properties of reddened objects and correctly interpret
observations. In this work, we attempt to measure the optical-infrared
extinction laws of the Large and Small Magellanic Clouds (LMC and SMC)
by using red supergiant (RSG) stars and classical Cepheids as
extinction tracers. The spectroscopic RSG samples are constructed
based on the APOGEE spectral parameters, Gaia astrometric data, and
multiband photometry. We establish the effective temperature-intrinsic
color relations for RSG stars and determine the color excess ratio
(CER) E(λ-GRP)/E(GBP-GRP) for the LMC and SMC. We use
classical Cepheids to derive base relative extinction
AGrp/E(GBP-GRP). The results are 1.589±0.014 and 1.412±0.041
for the LMC and SMC. By combining CERs with AGrp/E(GBP-GRP), the
optical-infrared extinction coefficients Aλ/AGrp_ are
determined for 16 bands. We adjust the parameters of RV-dependent
extinction laws and obtain average extinction laws for the LMC and SMC
of RV=3.40±0.07 and RV=2.53±0.10, respectively, which are
consistent with Gordon et al. In the optical bands, the adjusted RV
extinction curves agree with the observations with deviations less
than 3%.
Description:
To determine the extinction law of the Large and Small Magellanic
Clouds (MCs), we collected spectroscopic data from APOGEE DR17 (III/286)
and optical to near-IR photometric data from Gaia DR3 (I/355), the
Magellanic Clouds Photometric Survey (MCPS; Zaritsky+ 2002, J/AJ/123/855
and 2004, J/AJ/128/1606), the SkyMapper Southern Survey (SMSS;
Wolf+ 2018, see II/379), the Survey of the Magellanic Stellar History
(SMASH; Nidever+ 2017, J/AJ/154/199), and the Two Micron All Sky
Survey (2MASS; Skrutskie+ 2006, VII/233).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 255 1471 Spectroscopic red supergiant (RSG) stars in
the Magellanic Clouds
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See also:
II/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VII/233 : 2MASS All-Sky Extended Source Catalog (XSC) (IPAC/UMass, 2003-2006)
II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
III/286 : APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
II/379 : SkyMapper Southern Sky Survey. DR4 (Onken+, 2024)
J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997)
J/AcA/48/147 : OGLE SMC BVI photometry (Udalski+ 1998)
J/AJ/123/855 : Magellanic Clouds Photometric Survey: SMC (Zaritsky+, 2002)
J/AJ/126/2867 : Red supergiants in Magellanic Clouds (Massey+, 2003)
J/A+A/410/905 : Interstellar reddening measurements (Patriarchi+, 2003)
J/AJ/128/1606 : Magellanic Clouds Photometric Survey: LMC (Zaritsky+, 2004)
J/ApJ/663/320 : IR-through-UV extinction curve (Fitzpatrick+, 2007)
J/ApJ/707/89 : Variation of mid-IR extinction (Gao+, 2009)
J/AJ/140/416 : IR photometry of massive stars in the SMC (Bonanos+, 2010)
J/AJ/142/103 : Cool evolved stars in SAGE-SMC and SAGE-LMC (Boyer+, 2011)
J/ApJ/727/53 : Red supergiant stars in the LMC. I. (Yang+, 2011)
J/ApJ/749/177 : Yellow and red supergiants in the LMC (Neugent+, 2012)
J/ApJ/753/71 : Mass-loss return from LMC evolved stars. VI. (Riebel+, 2012)
J/A+A/555/A50 : UBVIc photometry of stars in Westerlund 2 (Carraro+, 2013)
J/MNRAS/466/4540 : SUMaC I (Hagen+, 2017)
J/AJ/154/199 : Survey of the MAgellanic Stellar History (Nidever+, 2017)
J/A+A/609/A114 : Local Group AGB stars & red supergiants (Groenewegen+, 2018)
J/ApJ/861/153 : UV Extinction in the GALEX Bands. UVEXT (Sun+, 2018)
J/A+A/616/A175 : Red supergiant stars in the LMC. II. (Yang+, 2018)
J/MNRAS/487/4832 : Per-Lum relation of red supergiants (Chatys+, 2019)
J/A+A/628/A51 : Magellanic Clouds reddening map (Joshi+, 2019)
J/A+A/629/A91 : A source catalog for the SMC (Yang+, 2019)
J/ApJ/898/24 : Granulations of RSGs from ASAS-SN & iPTF (Ren+, 2020)
J/ApJ/906/73 : Tot/polarized extinction/em. PostPlanck Era (Hensley+, 2021)
J/AJ/161/74 : SMASH DR2. 197 SMASH fields (Nidever+, 2021)
J/ApJ/923/232 : Red supergiants in 12 Local Group galaxies (Ren+, 2021)
J/A+A/646/A141 : A source catalog for the LMC (Yang+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [2MASS]
6- 22 A17 --- 2MASS 2MASS object name (JHHMMSSss+DDMMSSs)
24- 32 F9.5 deg RAdeg [8.6/115.4] Right Ascension (J2000)
34- 42 F9.5 deg DEdeg [-74.4/-59] Declination (J2000)
44- 49 F6.1 K Teff [3691/4687] Effective temperature from
APOGEE
51- 56 F6.3 [cm/s2] log(g) [-0.15/1.5] Log surface gravity from APOGEE
58- 63 F6.3 [Sun] [M/H] [-1/-0.4] Metallicity from APOGEE
65- 73 F9.3 mag E(BP-RP) [-0.2/0.6]?=-9999 Gaia DR3 Blue-Red color
excess
75- 80 F6.3 mag Gmag [10.89/16.3] Apparent Gaia DR3 G band
magnitude
82- 87 F6.3 mag Bpmag [11.9/17] Apparent Gaia Blue passband
magnitude
89- 94 F6.3 mag Rpmag [9.8/15.5] Apparent Gaia Red passband
magnitude
96- 100 F5.3 mag e_Gmag [0.003/0.02] Uncertainty in Gmag
102- 106 F5.3 mag e_Bpmag [0.003/0.2] Uncertainty in Bpmag
108- 112 F5.3 mag e_Rpmag [0.004/0.05] Uncertainty in Rpmag
114- 119 F6.3 mag Umag [0/20.2]? Apparent U band Vega magnitude
121- 126 F6.3 mag Bmag [11.88/19.8]? Apparent B band Vega
magnitude
128- 133 F6.3 mag Vmag [10.9/18.5]? Apparent V band Vega magnitude
135- 139 F5.3 mag e_Umag [0/9.999]? Uncertainty in Umag
141- 145 F5.3 mag e_Bmag [0.01/0.6]? Uncertainty in Bmag
147- 151 F5.3 mag e_Vmag [0/0.5]? Uncertainty in Vmag
153- 158 F6.3 mag umagSM [12.4/21.2]? Apparent SMASH u band AB
magnitude
160- 165 F6.3 mag gmagSM [13.19/18.1]? Apparent SMASH g band AB
magnitude
167- 171 F5.3 mag e_umagSM [0.003/0.2]? Uncertainty in umagSM
173- 177 F5.3 mag e_gmagSM [0.001/0.3]? Uncertainty in gmagSM
179- 184 F6.3 mag vmagSky [11.8/18.6]? Apparent SKYMAPPER v band AB
magnitude
186- 191 F6.3 mag gmagSky [11.86/16.1]? Apparent SKYMAPPER g band AB
magnitude
193- 198 F6.3 mag rmagSky [10.78/15.01]? Apparent SKYMAPPER r band AB
magnitude
200- 205 F6.3 mag imagSky [9.99/14.4]? Apparent SKYMAPPER i band AB
magnitude
207- 212 F6.3 mag zmagSky [9.6/14.1]? Apparent SKYMAPPER z band AB
magnitude
214- 219 F6.3 mag Jmag [8.29/14.4] 2MASS J band Vega magnitude
221- 226 F6.3 mag Hmag [7.5/12.2] 2MASS H band Vega magnitude
228- 233 F6.3 mag Ksmag [7.19/12] 2MASS Ks band Vega magnitude
235- 239 F5.3 mag e_Jmag [0.018/0.09]? Uncertainty in Jmag
241- 245 F5.3 mag e_Hmag [0.018/0.07]? Uncertainty in Hmag
247- 251 F5.3 mag e_Ksmag [0.016/0.05]? Uncertainty in Ksmag
253- 255 A3 --- MC Galaxy identifier ("LMC" or "SMC")
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 27-Feb-2025