J/MNRAS/508/245 VMC survey XLIII. LMC star formation history (Mazzi+, 2021)
The VMC survey. XLIII.
The spatially resolved star formation history across the Large Magellanic Cloud.
Mazzi A., Girardi L., Zaggia S., Pastorelli G., Rubele S., Bressan A.,
Cioni M.-R. L., Clementini G., Cusano F., Rocha J.P., Gullieuszik M.,
Kerber L., Marigo P., Ripepi V., Bekki K., Bell C.P.M., de Grijs R.,
Groenewegen M.A.T., Ivanov V.D., Oliveira J.M., Sun N.-C., van Loon J.T.
<Mon. Not. R. Astron. Soc. 508, 245-266 (2021)>
=2021MNRAS.508..245M 2021MNRAS.508..245M (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds
Keywords: galaxies: evolution - Magellanic Clouds - galaxies: structure
Abstract:
We derive the spatially resolved star formation history (SFH) for a
96deg2 area across the main body of the Large Magellanic Cloud
(LMC), using the near- infrared photometry from the VISTA survey of
the Magellanic Clouds (VMC). The data and analyses are characterized
by a great degree of homogeneity and a low sensitivity to the
interstellar extinction. 756 subregions of size 0.125deg2 -
corresponding to projected sizes of about 296x322pc2 in the LMC -
are analysed. The resulting SFH maps, with typical resolution of
0.2-0.3dex in logarithm of age, reveal main features in the LMC disc
at different ages: the patchy star formation at recent ages, the
concentration of star formation on three spiral arms and on the Bar up
to ages of ∼1.6Gyr, and the wider and smoother distribution of older
populations. The period of most intense star formation occurred
roughly between 4 and 0.5Gyr ago, at rates of ∼0.3M☉/yr. We
compare young and old star formation rates with the observed numbers
of RR Lyrae and Cepheids. We also derive a mean extinction and mean
distance for every subregion, and the plane that best describes the
spatial distribution of the mean distances. Our results cover an area
about 50 per cent larger than the classical SFH maps derived from
optical data. Main differences with respect to those maps are lower
star formation rates at young ages, and a main peak of star formation
being identified at ages slightly younger than 1Gyr.
Description:
Resolved SFH of the LMC determined from fitting models computed with
the TRIEGAL population synthesis model (Girardi et al,
2005A&A...436..895G 2005A&A...436..895G) to data from the Vista survey of the Magellanic
Clouds (Cioni et al., 2011A&A...527A.116C 2011A&A...527A.116C, Cat. II/351).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
sfhjks.dat 284 756 SFH of the LMC (JKs dataset), median
sfhjksm1.dat 284 756 SFH of the LMC (JKs dataset), 16th percentile
sfhjksp1.dat 284 756 SFH of the LMC (JKs dataset), 84th percentile
sfhyks.dat 284 756 SFH of the LMC (YKs dataset), median
sfhyksm1.dat 284 756 SFH of the LMC (YKs dataset), 16th percentile
sfhyksp1.dat 284 756 SFH of the LMC (YKs dataset), 84th percentile
--------------------------------------------------------------------------------
See also:
II/351 : VISTA Magellanic Survey (VMC) catalog (Cioni+, 2011)
Byte-by-byte Description of file: sfhjks.dat sfhyks.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- tile LMC tile identifier
5- 6 I2 --- subr LMC subtile identifier
8- 14 F7.4 deg RAdeg Right ascension of the center of the
subtile (J2000)
16- 23 F8.4 deg DEdeg Declination of the center of the
subtile (J2000)
25- 31 F7.4 deg RAdeg1 Right ascension of corner 1 of the
subtile (J2000)
33- 40 F8.4 deg DEdeg1 Declination of corner 1 of the subtile
(J2000)
42- 48 F7.4 deg RAdeg2 Right ascension of corner 2 of the
subtile (J2000)
50- 57 F8.4 deg DEdeg2 Declination of corner 2 of the subtile
(J2000)
59- 65 F7.4 deg RAdeg3 Right ascension of corner 3 of the
subtile (J2000)
67- 74 F8.4 deg DEdeg3 Declination of corner 3 of the subtile
(J2000)
76- 82 F7.4 deg RAdeg4 Right ascension of corner 4 of the
subtile (J2000)
84- 91 F8.4 deg DEdeg4 Declination of corner 4 of the subtile
93- 97 F5.3 deg2 areaeff Area of the subtile
99-104 I6 --- nstars Number of stars in the subtile
106-113 E8.3 Msun/yr a1 Best fit SFR at 6.6<log(age/yr)<6.9
115-122 E8.3 Msun/yr a2 Best fit SFR at 6.9<log(age/yr)<7.2
124-131 E8.3 Msun/yr a3 Best fit SFR at 7.2<log(age/yr)<7.5
133-140 E8.3 Msun/yr a4 Best fit SFR at 7.5<log(age/yr)<7.8
142-149 E8.3 Msun/yr a5 Best fit SFR at 7.8<log(age/yr)<8.1
151-158 E8.3 Msun/yr a6 Best fit SFR at 8.1<log(age/yr)<8.4
160-167 E8.3 Msun/yr a7 Best fit SFR at 8.4<log(age/yr)<8.6
169-176 E8.3 Msun/yr a8 Best fit SFR at 8.6<log(age/yr)<8.8
178-185 E8.3 Msun/yr a9 Best fit SFR at 8.8<log(age/yr)<9.0
187-194 E8.3 Msun/yr a10 Best fit SFR at 9.0<log(age/yr)<9.2
196-203 E8.3 Msun/yr a11 Best fit SFR at 9.2<log(age/yr)<9.4
205-212 E8.3 Msun/yr a12 Best fit SFR at 9.4<log(age/yr)<9.6
214-221 E8.3 Msun/yr a13 Best fit SFR at 9.6<log(age/yr)<9.8
223-230 E8.3 Msun/yr a14 Best fit SFR at 9.8<log(age/yr)<10.0
232-239 E8.3 Msun/yr a15 Best fit SFR at 10.0<log(age/yr)<10.1
241-248 E8.3 Msun/yr a16 Best fit SFR at 10.1<log(age/yr)<10.2
250-255 F6.3 mag mu0 Best fit true distance modulus
257-262 F6.3 mag AV Best fit extinction
264-269 F6.3 --- d[Fe/H]1 Best fit metallicity shift at the
youngest age bin (dex)
271-276 F6.3 --- d[Fe/H]2 Best fit metallicity shift at the
oldest age bin (dex)
278-284 F7.1 --- mlnL Negative log likelihood of the
best fit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: sfhjksm1.dat sfhyksm1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- tile LMC tile identifier
5- 6 I2 --- subr LMC subtile identifier
8- 14 F7.4 deg RAdeg Right ascension of the center of the
subtile (J2000)
16- 23 F8.4 deg DEdeg Declination of the center of the
subtile (J2000)
25- 31 F7.4 deg RAdeg1 Right ascension of corner 1 of the
subtile (J2000)
33- 40 F8.4 deg DEdeg1 Declination of corner 1 of the subtile
(J2000)
42- 48 F7.4 deg RAdeg2 Right ascension of corner 2 of the
subtile (J2000)
50- 57 F8.4 deg DEdeg2 Declination of corner 2 of the subtile
(J2000)
59- 65 F7.4 deg RAdeg3 Right ascension of corner 3 of the
subtile (J2000)
67- 74 F8.4 deg DEdeg3 Declination of corner 3 of the subtile
(J2000)
76- 82 F7.4 deg RAdeg4 Right ascension of corner 4 of the
subtile (J2000)
84- 91 F8.4 deg DEdeg4 Declination of corner 4 of the subtile
93- 97 F5.3 deg2 areaeff Area of the subtile
99-104 I6 --- nstars Number of stars in the subtile
106-113 E8.3 Msun/yr b_a1 16th percentile SFR
at 6.6<log(age/yr)<6.9
115-122 E8.3 Msun/yr b_a2 16th percentile SFR
at 6.9<log(age/yr)<7.2
124-131 E8.3 Msun/yr b_a3 16th percentile SFR
at 7.2<log(age/yr)<7.5
133-140 E8.3 Msun/yr b_a4 16th percentile SFR
at 7.5<log(age/yr)<7.8
142-149 E8.3 Msun/yr b_a5 16th percentile SFR
at 7.8<log(age/yr)<8.1
151-158 E8.3 Msun/yr b_a6 16th percentile SFR
at 8.1<log(age/yr)<8.4
160-167 E8.3 Msun/yr b_a7 16th percentile SFR
at 8.4<log(age/yr)<8.6
169-176 E8.3 Msun/yr b_a8 16th percentile SFR
at 8.6<log(age/yr)<8.8
178-185 E8.3 Msun/yr b_a9 16th percentile SFR
at 8.8<log(age/yr)<9.0
187-194 E8.3 Msun/yr b_a10 16th percentile SFR
at 9.0<log(age/yr)<9.2
196-203 E8.3 Msun/yr b_a11 16th percentile SFR
at 9.2<log(age/yr)<9.4
205-212 E8.3 Msun/yr b_a12 16th percentile SFR
at 9.4<log(age/yr)<9.6
214-221 E8.3 Msun/yr b_a13 16th percentile SFR
at 9.6<log(age/yr)<9.8
223-230 E8.3 Msun/yr b_a14 16th percentile SFR
at 9.8<log(age/yr)<10.0
232-239 E8.3 Msun/yr b_a15 16th percentile SFR
at 10.0<log(age/yr)<10.1
241-248 E8.3 Msun/yr b_a16 16th percentile SFR
at 10.1<log(age/yr)<10.2
250-255 F6.3 mag b_mu0 16th percentile true distance modulus
257-262 F6.3 mag b_AV 16th percentile extinction
264-269 F6.3 --- b_d[Fe/H]1 16th percentile metallicity shift
at the youngest age bin (dex)
271-276 F6.3 --- b_d[Fe/H]2 16th percentile metallicity shift
at the oldest age bin (dex)
278-284 F7.1 --- mlnL Negative log likelihood of the 16th
percentile
--------------------------------------------------------------------------------
Byte-by-byte Description of file: sfhjksp1.dat sfhyksp1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- tile LMC tile identifier
5- 6 I2 --- subr LMC subtile identifier
8- 14 F7.4 deg RAdeg Right ascension of the center of the
subtile (J2000)
16- 23 F8.4 deg DEdeg Declination of the center of the
subtile (J2000)
25- 31 F7.4 deg RAdeg1 Right ascension of corner 1 of the
subtile (J2000)
33- 40 F8.4 deg DEdeg1 Declination of corner 1 of the subtile
(J2000)
42- 48 F7.4 deg RAdeg2 Right ascension of corner 2 of the
subtile (J2000)
50- 57 F8.4 deg DEdeg2 Declination of corner 2 of the subtile
(J2000)
59- 65 F7.4 deg RAdeg3 Right ascension of corner 3 of the
subtile (J2000)
67- 74 F8.4 deg DEdeg3 Declination of corner 3 of the subtile
(J2000)
76- 82 F7.4 deg RAdeg4 Right ascension of corner 4 of the
subtile (J2000)
84- 91 F8.4 deg DEdeg4 Declination of corner 4 of the subtile
93- 97 F5.3 deg2 areaeff Area of the subtile
99-104 I6 --- nstars Number of stars in the subtile
106-113 E8.3 Msun/yr B_a1 84th percentile SFR
at 6.6<log(age/yr)<6.9
115-122 E8.3 Msun/yr B_a2 84th percentile SFR
at 6.9<log(age/yr)<7.2
124-131 E8.3 Msun/yr B_a3 84th percentile SFR
at 7.2<log(age/yr)<7.5
133-140 E8.3 Msun/yr B_a4 84th percentile SFR
at 7.5<log(age/yr)<7.8
142-149 E8.3 Msun/yr B_a5 84th percentile SFR
at 7.8<log(age/yr)<8.1
151-158 E8.3 Msun/yr B_a6 84th percentile SFR
at 8.1<log(age/yr)<8.4
160-167 E8.3 Msun/yr B_a7 84th percentile SFR
at 8.4<log(age/yr)<8.6
169-176 E8.3 Msun/yr B_a8 84th percentile SFR
at 8.6<log(age/yr)<8.8
178-185 E8.3 Msun/yr B_a9 84th percentile SFR
at 8.8<log(age/yr)<9.0
187-194 E8.3 Msun/yr B_a10 84th percentile SFR
at 9.0<log(age/yr)<9.2
196-203 E8.3 Msun/yr B_a11 84th percentile SFR
at 9.2<log(age/yr)<9.4
205-212 E8.3 Msun/yr B_a12 84th percentile SFR
at 9.4<log(age/yr)<9.6
214-221 E8.3 Msun/yr B_a13 84th percentile SFR
at 9.6<log(age/yr)<9.8
223-230 E8.3 Msun/yr B_a14 84th percentile SFR
at 9.8<log(age/yr)<10.0
232-239 E8.3 Msun/yr B_a15 84th percentile SFR
at 10.0<log(age/yr)<10.1
241-248 E8.3 Msun/yr B_a16 84th percentile SFR
at 10.1<log(age/yr)<10.2
250-255 F6.3 mag B_mu0 84th percentile true distance modulus
257-262 F6.3 mag B_AV 84th percentile extinction
264-269 F6.3 --- B_d[Fe/H]1 84th percentile metallicity shift at
the youngest age bin (dex)
271-276 F6.3 --- B_d[Fe/H]2 84th percentile metallicity shift at
the oldest age bin (dex)
278-284 F7.1 --- mlnL Negative log likelihood of the 84th
percentile
--------------------------------------------------------------------------------
Acknowledgements:
Alessandro Mazzi, alessandro.mazzi(at)unipd.it
Leo Girardi, leo.girardi(at)inaf.it
History:
21-Oct-2021: on-line version
11-May-2022: Added age intervals to SFR values/percentiles explanations
References:
Girardi et al., 2005A&A...436..895G 2005A&A...436..895G
Cioni et al., Paper I 2011A&A...527A.116C 2011A&A...527A.116C, Cat. II/351
Miszalski et al., Paper II 2011A&A...531A.157M 2011A&A...531A.157M
Gullieuszik et al., Paper III 2012A&A...537A.105G 2012A&A...537A.105G, Cat. J/A+A/537/A105
Rubele et al., Paper IV 2012A&A...537A.106R 2012A&A...537A.106R
Ripepi et al., Paper V 2012MNRAS.424.1807R 2012MNRAS.424.1807R, Cat. J/MNRAS/424/1807
Cioni et al., Paper VI 2013A&A...549A..29C 2013A&A...549A..29C, Cat. J/A+A/549/A29
Tatton et al., Paper VII 2013A&A...554A..33T 2013A&A...554A..33T, Cat. J/A+A/554/A33
Ripepi et al., Paper VIII 2014MNRAS.437.2307R 2014MNRAS.437.2307R Cat. J/MNRAS/437/2307
Cioni et al., Paper IX 2014A&A...562A..32C 2014A&A...562A..32C
Moretti et al., Paper X 2014MNRAS.437.2702M 2014MNRAS.437.2702M, Cat. J/MNRAS/437/2702
Li et al., Paper XI 2014ApJ...790...35L 2014ApJ...790...35L
Piatti et al., Paprt XII 2014A&A...570A..74P 2014A&A...570A..74P
Ripepi et al., Paper XIII 2015MNRAS.446.3034R 2015MNRAS.446.3034R, Cat. J/MNRAS/446/3034
Rubele et al., Paper XIV 2015MNRAS.449..639R 2015MNRAS.449..639R, Cat. J/MNRAS/449/639
Piatti et al., Paper XV 2015MNRAS.450..552P 2015MNRAS.450..552P
Piatti et al., Paper XVI 2015MNRAS.454..839P 2015MNRAS.454..839P, Cat. J/MNRAS/454/839
Cioni et al., Paper XVII 2016A&A...586A..77C 2016A&A...586A..77C
Zhang et al., Paper XVIII 2015ApJ...815...95Z 2015ApJ...815...95Z
Ripepi et al., Paper XIX 2016ApJS..224...21R 2016ApJS..224...21R, Cat. J/ApJS/224/21
Moretti et al., Paper XX 2016MNRAS.459.1687M 2016MNRAS.459.1687M, Cat. J/MNRAS/459/1687
Piatti et al., Paper XXI 2016MNRAS.460..383P 2016MNRAS.460..383P
Sun et al., Paper XXII 2017ApJ...835..171S 2017ApJ...835..171S
Marconi et al., Paper XXIII 2017MNRAS.466.3206M 2017MNRAS.466.3206M
Subramanian et al., Paper XXIV 2017MNRAS.467.2980S 2017MNRAS.467.2980S
Ripepi et al., Paper XXV 2017MNRAS.472..808R 2017MNRAS.472..808R, Cat. J/MNRAS/472/808
Muraveva et al., Paper XXVI 2018MNRAS.473.3131M 2018MNRAS.473.3131M, Cat. J/MNRAS/473/3131
Sun et al., Paper XXVII 2017ApJ...849..149S 2017ApJ...849..149S, Cat. J/ApJ/849/149
Niederhofer et al., Paper XXVIII 2018A&A...612A.115N 2018A&A...612A.115N
Sun et al., Paper XXIX 2018ApJ...858...31S 2018ApJ...858...31S, Cat. J/ApJ/858/31
Niederhofer et al., Paper XXX 2018A&A...613L...8N 2018A&A...613L...8N
Rubele et al., Paper XXXI 2018MNRAS.478.5017R 2018MNRAS.478.5017R, Cat. J/MNRAS/478/5017
Zivkov et al., Paper XXXII 2018A&A...620A.143Z 2018A&A...620A.143Z
Groenewegen et al., Paper XXXIII 2019A&A...622A..63G 2019A&A...622A..63G
El Youssoufi et al., Paper XXXIV 2019MNRAS.490.1076E 2019MNRAS.490.1076E
Ragosta et al., Paper XXXV 2019MNRAS.490.4975R 2019MNRAS.490.4975R
Zivkov et al., Paper XXXVI 2020MNRAS.494..458Z 2020MNRAS.494..458Z, Cat. J/MNRAS/494/458
Groenewegen et al., Paper XXXVII 2020A&A...636A..48G 2020A&A...636A..48G, Cat. J/A+A/636/A48
Schmidt et al., Paper XXXVIII 2020A&A...641A.134S 2020A&A...641A.134S
Niederhofer et al., Paper XXXIX 2020MNRAS.497.3746C 2020MNRAS.497.3746C
Tatton et al., Paper XL 2021MNRAS.504.2983T 2021MNRAS.504.2983T
Niederhofer et al., Paper XLI 2021MNRAS.502.2859N 2021MNRAS.502.2859N
Cusano et al., Paper XLII 2021MNRAS.504....1C 2021MNRAS.504....1C
(End) Patricia Vannier [CDS] 20-Oct-2021