2015ApJ...802L..22R

Query : 2015ApJ...802L..22R

2015ApJ...802L..22R - Astrophys. J., 802, L22 (2015/April-1)

Compact stellar binary assembly in the first nuclear star clusters and r-process synthesis in the early universe.

RAMIREZ-RUIZ E., TRENTI M., MacLEOD M., ROBERTS L.F., LEE W.H. and SALADINO-ROSAS M.I.

Abstract (from CDS):

Investigations of elemental abundances in the ancient and most metal deficient stars are extremely important because they serve as tests of variable nucleosynthesis pathways and can provide critical inferences of the type of stars that lived and died before them. The presence of r-process elements in a handful of carbon-enhanced metal-poor (CEMP-r) stars, which are assumed to be closely connected to the chemical yield from the first stars, is hard to reconcile with standard neutron star mergers. Here we show that the production rate of dynamically assembled compact binaries in high-z nuclear star clusters can attain a sufficient high value to be a potential viable source of heavy r-process material in CEMP-r stars. The predicted frequency of such events in the early Galaxy, much lower than the frequency of Type II supernovae but with significantly higher mass ejected per event, can naturally lead to a high level of scatter of Eu as observed in CEMP-r stars.

Abstract Copyright: ∼

Journal keyword(s): early universe - galaxies: evolution - galaxies: high-redshift - stars: abundances

Simbad objects: 1

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Number of rows : 1
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 BPS CS 22892-0052 Pe* 22 17 01.6558764360 -16 39 27.051026544   14.03 13.20 13.06 12.19 KIIvw 472 0

Query : 2015ApJ...802L..22R

Basic data :
BPS CS 22892-0052 -- Chemically Peculiar Star
Other object types: otypes_help 		* (2023A&A,UCAC2,...), Pe* (1994ApJ), NIR (DENIS,2MASS), MIR (WISEA,WISE)
ICRS coord. (ep=J2000) : 		22 17 01.6558764360 -16 39 27.051026544 (Optical) [ 0.0195 0.0164 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 14 18.9797156270 -16 54 27.009218956 [ 0.0195 0.0164 90 ]
Gal coord. (ep=J2000) : 		041.1454516550799 -52.8483206770933 [ 0.0195 0.0164 90 ]
Proper motions mas/yr : 		12.300 -6.558 [0.024 0.019 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 13.74 [1.42] / z(spectroscopic) 0.000046 [0.000005] / cz 13.74 [1.42]
   (Opt) B 2022yCat.1355....0G
Parallaxes (mas): 		0.1602 [0.0236] A 2020yCat.1350....0G
Spectral type: 		KIIvw D 1997ApJ...488..350N
Fluxes (11) :
B 14.03 [0.03] D 2012yCat.1322....0Z
V 13.20 [0.01] D 2012yCat.1322....0Z
R 13.06 [0.08] E 2012yCat.1322....0Z
G 12.946546 [0.002772] C 2020yCat.1350....0G
I 12.19 [0.02] C 2005yCat.2263....0D
J 11.492 [0.021] C 2003yCat.2246....0C
H 11.022 [0.022] C 2003yCat.2246....0C
K 10.929 [0.021] C 2003yCat.2246....0C
g 13.61 [0.02] D 2012yCat.1322....0Z
r 12.93 [0.02] D 2012yCat.1322....0Z
i 12.67 [0.00] D 2012yCat.1322....0Z
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Identifiers (14) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

UCAC2 25674387 GALAH 150718004401358 TIC 335871297 Gaia DR2 6826025986350385280
BPS CS 22892-0052 GES J22170166-1639271 UCAC4 367-181240 Gaia DR3 6826025986350385280
DENIS J221701.6-163926 HE 2214-1654 WISEA J221701.66-163927.1
EPIC 205941432 2MASS J22170165-1639271 WISE J221701.65-163927.0

References (472 between 1850 and 2026) (Total 472)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 10    Fe/H : 27    Plx : 2    PM : 2   

   

Observing logs
XMM : 1   

   

External archives :

Link by name to the catalogue in VizieR :

UCAC2 25674387 DENIS J221701.6-163926 GALAH 150718004401358 2MASS J22170165-1639271 UCAC4 367-181240
WISEA J221701.66-163927.1 WISE J221701.65-163927.0 Gaia DR2 6826025986350385280 Gaia DR3 6826025986350385280

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