2020NatAs...4.1102M

Query : 2020NatAs...4.1102M

2020NatAs...4.1102M - Nature Astronomy, 4, 1102-1110 (2020/November-0)

Carbon star formation as seen through the non-monotonic initial-final mass relation.

MARIGO P., CUMMINGS J.D., CURTIS J.L., KALIRAI J., CHEN Y., TREMBLAY P.-E., RAMIREZ-RUIZ E., BERGERON P., BLADH S., BRESSAN A., GIRARDI L., PASTORELLI G., TRABUCCHI M., CHENG S., ARINGER B. and DAL TIO P.

Abstract (from CDS):

The initial-final mass relation (IFMR) links the birth mass of a star to the mass of the compact remnant left at its death. While the relevance of the IFMR across astrophysics is universally acknowledged, not all of its fine details have yet been resolved. A new analysis of a few carbon-oxygen white dwarfs in old open clusters of the Milky Way led us to identify a kink in the IFMR, located over a range of initial masses, 1.65 <= Mi/M☉ <= 2.10. The kink's peak in white dwarf mass of about 0.70-0.75 M☉ is produced by stars with Mi ≃ 1.8-1.9 M☉, corresponding to ages of about 1.8-1.7 Gyr. Interestingly, this peak coincides with the initial mass limit between low-mass stars that develop a degenerate helium core after central hydrogen exhaustion, and intermediate-mass stars that avoid electron degeneracy. We interpret the IFMR kink as the signature of carbon star formation in the Milky Way. This finding is critical to constraining the evolution and chemical enrichment of low-mass stars, and their impact on the spectrophotometric properties of galaxies.

Abstract Copyright: ©

Journal keyword(s):

Simbad objects: 30

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Number of rows : 30
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
2 PSO J029.7727+38.0605 WD* 01 59 05.4454308840 +38 03 38.168352216           DA 5 0
3 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
4 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
5 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
6 [DRR2009] LRIS-24 WD* 16 23 41.2 -26 29 54     22.724   22.462 DA 8 0
7 [DRR2009] LRIS-5 WD* 16 23 41.4 -26 32 53     22.706   22.433 DA 6 0
8 [DRR2009] LRIS-6 WD* 16 23 42.3 -26 32 39     22.646   22.368 DA 8 0
9 [DRR2009] LRIS-20 WD* 16 23 46.5 -26 30 32     23.010   22.692 DA 8 0
10 [DRR2009] LRIS-0 WD* 16 23 49.9 -26 33 32     23.320   23.001 DA 8 0
11 [DRR2009] LRIS-15 WD* 16 23 51.0 -26 31 08     22.725   22.464 DA 8 0
12 [DRR2009] LRIS-4 WD* 16 23 51.3 -26 33 04     22.690   22.422 DA 8 0
13 GALEX J191252.4-161435 WD* 19 12 52.4679715152 -16 14 35.161611360           DB 14 0
14 PSO J288.6589-15.9828 WD* 19 14 38.1475700760 -15 58 57.726862392           D 13 0
15 PSO J288.7652-16.0614 WD* 19 15 03.6713967840 -16 03 41.044869144           D 13 0
16 PSO J288.8258-17.6195 * 19 15 18.2058015015 -17 37 10.265188990           ~ 1 0
17 GALEX J191533.7-165248 WD* 19 15 33.7796594448 -16 52 49.199392632           DA 15 0
18 PSO J289.0572-16.3370 WD* 19 16 13.7307143040 -16 20 12.849798768           DA 12 0
19 NGC 6774 OpC 19 16 17.6 -16 20 45           ~ 258 0
20 PSO J289.2489-16.5225 WD* 19 16 59.7406615632 -16 31 20.812478196           DA 14 0
21 PSO J289.5070-15.8322 WD* 19 18 01.6907183280 -15 49 55.809019308           DA 12 0
22 PSO J289.6844-15.8988 WD* 19 18 44.2589555904 -15 53 55.622818644           DA 11 0
23 PSO J289.7425-16.8060 WD* 19 18 58.2206596440 -16 48 21.504391776           D 11 0
24 NGC 6819 OpC 19 41 18.3 +40 11 19   8.21 7.3     ~ 719 0
25 Cl* NGC 6819 KHK 6 WD* 19 41 19.96 +40 02 56.1   23.01 22.94     DA 9 0
26 Cl* NGC 7789 KHK 11 WD* 23 56 30.81 +56 37 19.3   23.63 23.36     DA 5 0
27 Cl* NGC 7789 KHK 14 WD* 23 56 37.78 +56 39 08.4   23.76 23.55     DA 5 0
28 Cl* NGC 7789 KHK 5 WD* 23 56 49.06 +56 40 13.2   22.53 22.49     DA 9 0
29 Cl* NGC 7789 KHK 8 WD* 23 56 57.22 +56 40 01.1   23.30 23.15     DA 9 0
30 NGC 7789 OpC 23 57 19.4 +56 43 28   7.68 6.7     ~ 575 0

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