J/ApJ/907/18 Red Supergiants in M31 and M33. I. The complete sample (Ren+, 2021)
Red Supergiants in M31 and M33.
I. The Complete Sample.
Ren Yi, Jiang B., Yang M., Wang T., Jian M., Ren T.
<Astrophys. J., 907, 18 (2021)>
=2021ApJ...907...18R 2021ApJ...907...18R
ADC_Keywords: Galaxies; Stars, supergiant; Photometry, infrared; Colors;
Optical; Parallaxes, trigonometric; Proper motions
Keywords: Massive stars ; Red supergiant stars ; Andromeda Galaxy ;
Triangulum Galaxy
Abstract:
The aim of this paper is to establish a complete sample of red
supergiants (RSGs) in M31 and M33. The member stars of the two
galaxies are selected from the near-infrared (NIR) point sources after
removing the foreground dwarfs from their obvious branch in the J -
H/H - K diagram with the archival photometric data taken by the
UKIRT/WFCAM. This separation by NIR colors of dwarfs from giants is
confirmed by the optical/infrared color-color diagrams (r - z/z - H
and B - V/V - R) and the Gaia measurement of parallax and proper
motion. The RSGs are then identified by their outstanding location in
the members' J - K/K diagram due to high luminosity and low effective
temperature. The resultant sample has 5498 and 3055 RSGs in M31 and
M33 respectively, which should be complete because the lower limiting
K magnitude of RSGs in both cases is brighter than the complete
magnitude of the UKIRT photometry. Analysis of the control fields
finds that the pollution rate in the RSG sample is less than 1%. The
by-product is the complete sample of oxygen-rich asymptotic giant
branch stars (AGBs), carbon-rich AGBs, thermally pulsing AGBs, and
extreme AGBs. In addition, the tip-RGB is determined together with its
implication on the distance modulus to M31 and M33.
Description:
The JHK brightness comes from images taken with the Wide Field Camera
(WFCAM) from mid-2005 to 2008 on the 3.8m United Kingdom Infra-Red
Telescope (UKIRT) located in Hawaii (Irwin 2013). WFCAM consists of
four Rockwell Hawaii-II (HgCdTe 2048x2048) detectors, each covering
13.65' on sky with 0.4"/pixel.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
00 42 44.33 +41 16 07.5 M31 = M31
01 33 50.90 +30 39 36.6 M33 = M33
-----------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 394 5498 Catalog of red supergiants in M31
table5.dat 394 3055 Catalog of red supergiants in M33
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See also:
II/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/ApJ/501/153 : VRB photometry of red supergiants (Massey 1998)
J/AJ/126/2867 : Red supergiants in Magellanic Clouds (Massey+, 2003)
J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)
J/AJ/133/2393 : UBVRI phot. in 7 Local Group dwarfs galaxies (Massey+, 2007)
J/A+A/487/131 : JHKs photometry of LPVs in M33 (Cioni+, 2008)
J/ApJ/703/420 : Red supergiants in M31 (Massey+, 2009)
J/A+A/507/1375 : HST/ACS VI data of M31 globular clusters (Perina+, 2009)
J/ApJ/719/1784 : Yellow supergiants in the SMC (Neugent+, 2010)
J/ApJ/727/53 : Red supergiant stars in the LMC. I. (Yang+, 2011)
J/ApJ/750/97 : The yellow and red supergiants of M33 (Drout+, 2012)
J/ApJ/749/177 : Yellow and red supergiants in the LMC (Neugent+, 2012)
J/ApJ/754/35 : Red supergiant stars in the SMC. II. (Yang+, 2012)
J/A+A/578/A3 : New survey of supergiants in MCs (Gonzalez-Fernandez+, 2015)
J/ApJ/825/50 : Variable stars in M31 & M33. III. YSGs & RSGs (Gordon+, 2016)
J/ApJ/826/224 : RSG and foreground candidates in M31 (Massey+, 2016)
J/ApJ/859/73 : Variability of RSGs in M31 from iPTF survey (Soraisam+, 2018)
J/AJ/158/20 : K-M stars class I candidate RSGs in Gaia DR2 (Messineo+, 2019)
J/ApJS/241/35 : Period-luminosity relations of RSGs in M33 & M31 (Ren+, 2019)
J/A+A/629/A91 : A source catalog for the SMC (Yang+, 2019)
J/ApJ/898/24 : Granulations of red supergiants, ASAS-SN & iPTF (Ren+, 2020)
J/A+A/639/A116 : RSGs in the SMC (Yang+, 2020)
Byte-by-byte Description of file: table[45].dat
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Bytes Format Units Label Explanations
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1- 9 F9.6 deg RAdeg Degree of Right Ascension (J2000)
11- 19 F9.6 deg DEdeg Degree of Declination (J2000)
21- 26 F6.3 mag Jmag Apparent J-band magnitude
28- 32 F5.3 mag e_Jmag Standard error in Jmag
34- 35 I2 --- Type-J Source classification flag in Jmag (1)
37- 42 F6.3 mag Hmag Apparent H-band magnitude
44- 49 F6.3 mag e_Hmag Standard error in Hmag
51- 52 I2 --- Type-H Source classification flag in Hmag (1)
54- 59 F6.3 mag Kmag Apparent K-band magnitude
61- 65 F5.3 mag e_Kmag Standard error in Kmag
67- 68 I2 --- Type-K Source classification flag in Kmag (1)
70 I1 --- N-Flag Number of source identified as stellar source
72- 98 A27 --- GaiaDR2 Unique source designation of Gaia DR2
100-107 F8.4 mas plx ? Absolute stellar parallax from Gaia DR2
109-114 F6.4 mas e_plx ? Standard error in plx
116-122 F7.3 mas/yr pmRA ? Gaia DR2 proper motion along Right Ascension
pmRA*cosDE
124-128 F5.3 mas/yr e_pmRA ? Standard error in pmRA
130-136 F7.3 mas/yr pmDE ? Gaia DR2 Proper motion along Declination
138-142 F5.3 mas/yr e_pmDE ? Standard error in pmDE
144-150 F7.4 mag Gmag ? Gaia DR2 G-band mean magnitude
152-157 F6.4 mag e_Gmag ? Standard error in Gmag
159-165 F7.4 mag BPmag ? Gaia DR integrated BP mean magnitude
167-172 F6.4 mag e_BPmag ? Standard error in BPmag
174-180 F7.4 mag RPmag ? Integrated RP mean magnitude
182-187 F6.4 mag e_RPmag ? Standard error in RPmag
189-208 A20 --- LGGSName ? Unique source designation of LGGS
210-215 F6.3 mag Vmag ? Apparent V-band magnitude
217-221 F5.3 mag e_Vmag ? Standard error in Vmag
223-228 F6.3 mag B-V ? The B-V color index
230-234 F5.3 mag e_B-V ? Standard error in B-V
236-241 F6.3 mag U-B ? The U-B color index
243-247 F5.3 mag e_U-B ? Standard error in U-B
249-254 F6.3 mag V-R ? The V-R color index
256-260 F5.3 mag e_V-R ? Standard error in V-R
262-267 F6.3 mag R-I ? The R-I color index
269-273 F5.3 mag e_R-I ? Standard error in R-I
275-292 I18 --- PS1DR2ID ? Unique object identifier of PS1 DR2
294-300 F7.4 mag gFPSFMag ? Forced mean PSF magnitude in g band
302-310 F9.5 mag e_gFPSFMag ? Standard error in gFPSFMag
312-318 F7.4 mag rFPSFMag ? Forced mean PSF magnitude in r band
320-327 F8.5 mag e_rFPSFMag ? Standard error in e_rFPSFMag
329-335 F7.4 mag iFPSFMag ? Forced mean PSF magnitude in i band
337-344 F8.5 mag e_iFPSFMag ? Standard error in iFPSFMag
346-352 F7.4 mag zFPSFMag ? Forced mean PSF magnitude in z band
354-361 F8.5 mag e_zFPSFMag ? Standard error in zFPSFMag
363-369 F7.4 mag yFPSFMag ? Forced mean PSF magnitude in y band
371-378 F8.5 mag e_yFPSFMag ? Standard error in yFPSFMag
380-383 A4 --- Ext-Flag ? Marking extended source in PS1
385-389 A5 --- Pos-Flag Indicating the location of the source
391-394 A4 --- LGGSType Marking RSGs in ME16
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Note (1): Sources as follows:
-1 = stellar source
-2 = probably-stellar source
-7 = source with bad pixels
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History:
From electronic version of the journal
References:
Wang et al. Paper II. 2021ApJ...912..112W 2021ApJ...912..112W Cat. J/ApJ/912/112
(End) Prepared by [AAS], Coralie Fix [CDS], 31-May-2022