New subgrouping of multiple stellar populations in NGC 2808 based on low-resolution spectroscopy
We performed low-resolution spectroscopy for the red giant branch stars in an intriguing globular cluster (GC) NGC 2808, which hosts subpopulations with extreme helium and light-element abundances. In order to trace N, C, and Ca abundance differences among subpopulations, we measured CN, CH, and Ca...
Gespeichert in:
| Hauptverfasser: | , , , , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2021 September 1
|
| In: |
The astronomical journal
Year: 2021, Jahrgang: 162, Heft: 4, Pages: 1-11 |
| ISSN: | 1538-3881 |
| DOI: | 10.3847/1538-3881/ac0ce6 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-3881/ac0ce6 Verlag, lizenzpflichtig, Volltext: https://iopscience.iop.org/article/10.3847/1538-3881/ac0ce6 
|
| Verfasserangaben: | Seungsoo Hong, Dongwook Lim, Chul Chung, Jaeyeon Kim, Sang-Il Han, and Young-Wook Lee |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1775857387 | ||
| 003 | DE-627 | ||
| 005 | 20220820065419.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 211102s2021 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.3847/1538-3881/ac0ce6 |2 doi | |
| 035 | |a (DE-627)1775857387 | ||
| 035 | |a (DE-599)KXP1775857387 | ||
| 035 | |a (OCoLC)1341423233 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Hong, Seungsoo |e VerfasserIn |0 (DE-588)1244862479 |0 (DE-627)1775859797 |4 aut | |
| 245 | 1 | 0 | |a New subgrouping of multiple stellar populations in NGC 2808 based on low-resolution spectroscopy |c Seungsoo Hong, Dongwook Lim, Chul Chung, Jaeyeon Kim, Sang-Il Han, and Young-Wook Lee |
| 264 | 1 | |c 2021 September 1 | |
| 300 | |a 11 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 02.11.2021 | ||
| 520 | |a We performed low-resolution spectroscopy for the red giant branch stars in an intriguing globular cluster (GC) NGC 2808, which hosts subpopulations with extreme helium and light-element abundances. In order to trace N, C, and Ca abundance differences among subpopulations, we measured CN, CH, and Ca ii H&K spectral indices, respectively. We identified four subpopulations (G1, G2, G3, and G4) from CN and CH strength, with CN-weak/CH-strong G1, CN-intermediate/CH-strong G2, CN-strong/CH-intermediate G3, and CN-strong/CH-weak G4. Compared to [Na/O] from high-resolution spectroscopy, we show that CN index can more clearly separate G1 and G2. Since CN traces N abundance in a GC, it implies that G1 and G2 would show a larger difference in [N/Fe] compared to [Na/Fe], as predicted by chemical evolution models. Later generation stars G3 and G4, however, are better separated with high-resolution spectroscopy. We also found that G4 shows a stronger Ca ii H&K line strength compared to that of G1, but we suspect this to be a result of unusually strong He enhancement and/or Mg depletion in G4 of this GC. This work illustrates that combining low- and high-resolution spectroscopic studies can improve the separation of subpopulations in GCs. | ||
| 700 | 1 | |a Lim, Dongwook |e VerfasserIn |0 (DE-588)1219581593 |0 (DE-627)1735499862 |4 aut | |
| 700 | 1 | |a Chung, Chul |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kim, Jaeyeon |d 1993- |e VerfasserIn |0 (DE-588)1203905653 |0 (DE-627)1689012528 |4 aut | |
| 700 | 1 | |a Han, Sang-Il |e VerfasserIn |4 aut | |
| 700 | 1 | |a Lee, Young-Wook |e VerfasserIn |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t The astronomical journal |d Washington, DC : AAS Publishing, American Astronomical Society, 1998 |g 162(2021), 4, Artikel-ID 130, Seite 1-11 |w (DE-627)312175647 |w (DE-600)2003104-X |w (DE-576)090883306 |x 1538-3881 |7 nnas |a New subgrouping of multiple stellar populations in NGC 2808 based on low-resolution spectroscopy |
| 773 | 1 | 8 | |g volume:162 |g year:2021 |g number:4 |g elocationid:130 |g pages:1-11 |g extent:11 |a New subgrouping of multiple stellar populations in NGC 2808 based on low-resolution spectroscopy |
| 856 | 4 | 0 | |u https://doi.org/10.3847/1538-3881/ac0ce6 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 856 | 4 | 0 | |u https://iopscience.iop.org/article/10.3847/1538-3881/ac0ce6 |x Verlag |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20211102 | ||
| 993 | |a Article | ||
| 994 | |a 2021 | ||
| 998 | |g 1203905653 |a Kim, Jaeyeon |m 1203905653:Kim, Jaeyeon |d 700000 |d 714000 |d 714100 |e 700000PK1203905653 |e 714000PK1203905653 |e 714100PK1203905653 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 4 | ||
| 998 | |g 1219581593 |a Lim, Dongwook |m 1219581593:Lim, Dongwook |d 500000 |d 500881 |e 500000PL1219581593 |e 500881PL1219581593 |k 0/500000/ |k 1/500000/500881/ |p 2 | ||
| 999 | |a KXP-PPN1775857387 |e 3998295763 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"language":["eng"],"origin":[{"dateIssuedDisp":"2021 September 1","dateIssuedKey":"2021"}],"type":{"media":"Online-Ressource","bibl":"article-journal"},"relHost":[{"origin":[{"publisher":"AAS Publishing, American Astronomical Society ; Univ. of Chicago Press, Journals Division ; Institute of Physics Publ.","dateIssuedKey":"1998","publisherPlace":"Washington, DC ; Chicago, Ill. ; London","dateIssuedDisp":"1998-"}],"type":{"media":"Online-Ressource","bibl":"periodical"},"language":["eng"],"part":{"text":"162(2021), 4, Artikel-ID 130, Seite 1-11","volume":"162","issue":"4","extent":"11","year":"2021","pages":"1-11"},"id":{"issn":["1538-3881"],"zdb":["2003104-X"],"eki":["312175647"]},"title":[{"title_sort":"astronomical journal","title":"The astronomical journal"}],"note":["Gesehen am 13.12.2023","Fortsetzung der Druck-Ausgabe"],"disp":"New subgrouping of multiple stellar populations in NGC 2808 based on low-resolution spectroscopyThe astronomical journal","recId":"312175647","pubHistory":["Nachgewiesen 115.1998 - ; auch mit durchgehender Nr.-Zählung"],"titleAlt":[{"title":"AJ electronic edition"}]}],"physDesc":[{"extent":"11 S."}],"person":[{"given":"Seungsoo","role":"aut","display":"Hong, Seungsoo","family":"Hong","roleDisplay":"VerfasserIn"},{"given":"Dongwook","display":"Lim, Dongwook","role":"aut","family":"Lim","roleDisplay":"VerfasserIn"},{"given":"Chul","role":"aut","display":"Chung, Chul","family":"Chung","roleDisplay":"VerfasserIn"},{"given":"Jaeyeon","display":"Kim, Jaeyeon","role":"aut","roleDisplay":"VerfasserIn","family":"Kim"},{"family":"Han","roleDisplay":"VerfasserIn","role":"aut","display":"Han, Sang-Il","given":"Sang-Il"},{"given":"Young-Wook","role":"aut","display":"Lee, Young-Wook","roleDisplay":"VerfasserIn","family":"Lee"}],"name":{"displayForm":["Seungsoo Hong, Dongwook Lim, Chul Chung, Jaeyeon Kim, Sang-Il Han, and Young-Wook Lee"]},"note":["Gesehen am 02.11.2021"],"id":{"doi":["10.3847/1538-3881/ac0ce6"],"eki":["1775857387"]},"title":[{"title":"New subgrouping of multiple stellar populations in NGC 2808 based on low-resolution spectroscopy","title_sort":"New subgrouping of multiple stellar populations in NGC 2808 based on low-resolution spectroscopy"}],"recId":"1775857387"} | ||
| SRT | |a HONGSEUNGSNEWSUBGROU2021 | ||