Matches in SemOpenAlex for { <https://semopenalex.org/work/W4361279464> ?p ?o ?g. }
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- W4361279464 abstract "In this work, we study the phase-space and chemical properties of Sagittarius (Sgr) stream, the tidal tails produced by the ongoing destruction of Sgr dwarf spheroidal (dSph) galaxy, focusing on its very metal-poor (VMP; $rm[Fe/H] < -2$) content. We combine spectroscopic and astrometric information from SEGUE and $Gaia$ EDR3, respectively, with data products from a new large-scale run of $texttt{StarHorse}$ spectro-photometric code. Our selection criteria yields ${sim}1600$ stream members, including ${>}200$ VMP stars. We find the leading arm ($b>0^circ$) of Sgr stream to be more metal-poor, by ${sim}0.2$ dex, than the trailing one ($b<0^circ$). With a subsample of turnoff and subgiant stars, we estimate this substructure's stellar population to be ${sim}1$ Gyr older than the thick disk's. With the aid of an $N$-body model of the Sgr system, we verify that simulated particles stripped earlier (${>}2$ Gyr ago) have present-day phase-space properties similar to lower-metallicity stream stars. Conversely, those stripped more recently (${<}2$ Gyr) are preferentially more akin to metal-rich ($rm[Fe/H] > -1$) members of the stream. Such correlation between kinematics and chemistry can be explained by the existence of a dynamically hotter, less centrally-concentrated, and more metal-poor population in Sgr dSph prior to its disruption, implying that this galaxy was able to develop a metallicity gradient before its accretion. Finally, we discovered several carbon-enhanced metal-poor ($rm[C/Fe] > +0.7$ and $rm[Fe/H] leq -1.5$) stars in Sgr stream, which is in tension with current observations of its remaining core where such objects are not found." @default.
- W4361279464 created "2023-03-31" @default.
- W4361279464 creator A5010393279 @default.
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- W4361279464 date "2023-03-30" @default.
- W4361279464 modified "2023-10-14" @default.
- W4361279464 title "Phase-space Properties and Chemistry of the Sagittarius Stellar Stream Down to the Extremely Metal-poor ([Fe/H] ≲ −3) Regime" @default.
- W4361279464 cites W147232447 @default.
- W4361279464 cites W1562396570 @default.
- W4361279464 cites W1632875404 @default.
- W4361279464 cites W1710780480 @default.
- W4361279464 cites W1765928510 @default.
- W4361279464 cites W1797588316 @default.
- W4361279464 cites W1856612795 @default.
- W4361279464 cites W1964055719 @default.
- W4361279464 cites W1964387245 @default.
- W4361279464 cites W1971056876 @default.
- W4361279464 cites W1971486998 @default.
- W4361279464 cites W1972366022 @default.
- W4361279464 cites W1975114210 @default.
- W4361279464 cites W1979742375 @default.
- W4361279464 cites W1979951521 @default.
- W4361279464 cites W1980685507 @default.
- W4361279464 cites W1981016452 @default.
- W4361279464 cites W1987879084 @default.
- W4361279464 cites W1999645097 @default.
- W4361279464 cites W2000054184 @default.
- W4361279464 cites W2011301426 @default.
- W4361279464 cites W2016888075 @default.
- W4361279464 cites W2017509018 @default.
- W4361279464 cites W2018034419 @default.
- W4361279464 cites W2020018978 @default.
- W4361279464 cites W2028247403 @default.
- W4361279464 cites W2032551406 @default.
- W4361279464 cites W2033937785 @default.
- W4361279464 cites W2036670470 @default.
- W4361279464 cites W2038307337 @default.
- W4361279464 cites W2039280786 @default.
- W4361279464 cites W2039452097 @default.
- W4361279464 cites W2043685494 @default.
- W4361279464 cites W2045861476 @default.
- W4361279464 cites W2046650679 @default.
- W4361279464 cites W2055489299 @default.
- W4361279464 cites W2057015950 @default.
- W4361279464 cites W2059468604 @default.
- W4361279464 cites W2060498334 @default.
- W4361279464 cites W2062513796 @default.
- W4361279464 cites W2062892908 @default.
- W4361279464 cites W2063877010 @default.
- W4361279464 cites W2068041806 @default.
- W4361279464 cites W2073123016 @default.
- W4361279464 cites W2087738425 @default.
- W4361279464 cites W2087830080 @default.
- W4361279464 cites W2092131964 @default.
- W4361279464 cites W2092305195 @default.
- W4361279464 cites W2095680658 @default.
- W4361279464 cites W2097111096 @default.
- W4361279464 cites W2099728362 @default.
- W4361279464 cites W2100072568 @default.
- W4361279464 cites W2104311895 @default.
- W4361279464 cites W2106239882 @default.
- W4361279464 cites W2124201251 @default.
- W4361279464 cites W2125712657 @default.
- W4361279464 cites W2126597027 @default.
- W4361279464 cites W2126995954 @default.
- W4361279464 cites W2135625048 @default.
- W4361279464 cites W2143187540 @default.
- W4361279464 cites W2145990769 @default.
- W4361279464 cites W2146292423 @default.
- W4361279464 cites W2146714816 @default.
- W4361279464 cites W2149037703 @default.
- W4361279464 cites W2157917411 @default.
- W4361279464 cites W2159205914 @default.
- W4361279464 cites W2159640953 @default.
- W4361279464 cites W2170011509 @default.
- W4361279464 cites W2204123482 @default.
- W4361279464 cites W2216753448 @default.
- W4361279464 cites W2413988422 @default.
- W4361279464 cites W2469810790 @default.
- W4361279464 cites W2472803348 @default.
- W4361279464 cites W2476662071 @default.
- W4361279464 cites W2485876312 @default.
- W4361279464 cites W2486619033 @default.
- W4361279464 cites W2522000147 @default.
- W4361279464 cites W2554240634 @default.
- W4361279464 cites W2586431304 @default.
- W4361279464 cites W2613464155 @default.
- W4361279464 cites W2762263554 @default.
- W4361279464 cites W2762757028 @default.
- W4361279464 cites W2762924611 @default.
- W4361279464 cites W2765113916 @default.