J/A+A/697/A127 Atomic line list for 2MASS J05383296-5904280 (Hansen+, 2025)
The R-Process Alliance:
Hunting for gold in the near-UV spectrum of 2MASS J05383296-5904280.
Hansen T.T., Roederer I.U., Shah S.P., Ezzeddine R., Beers T.C., Frebel A.,
Holmbeck E.M., Placco V.M., Sakari C.M., Ji A., Marshall J.L., Mardini M.K.,
Chiti A.
<Astron. Astrophys. 697, A127 (2025)>
=2025A&A...697A.127H 2025A&A...697A.127H (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: stars: abundances - stars: chemically peculiar -
stars: kinematics and dynamics - stars: low-mass -
stars: Population II
Abstract:
Over the past few years, the R-Process Alliance (RPA) has successfully
carried out a search for stars that are highly enhanced in elements
produced via the rapid neutron-capture (r-) process. In particular,
the RPA has identified a number of relatively bright, highly
r-process-enhanced (r-II) stars, suitable for observations with the
Hubble Space Telescope (HST), facilitating abundance derivation of
elements such as gold (Au) and cadmium (Cd)
This paper presents the detailed abundances derived for the metal-poor
([Fe/H]=-2.55) highly r-process-enhanced ([Eu/Fe]=+1.29) r-II star
2MASS J05383296-5904280.
1D LTE elemental abundances are derived via equivalent width and
spectral synthesis using high-resolution high signal-to-noise near-UV
HST/STIS and optical Magellan/MIKE spectra.
Abundances are determined for 43 elements, including 26
neutron-capture elements. In particular, abundances of the rarely
studied elements Nb, Mo, Cd, Lu, Os, Pt, and Au are derived from the
HST spectrum. These results, combined with RPA near-UV observations of
two additional r-II stars, increase the number of Cd abundances
derived for r-process-enriched stars from seven to ten and Au
abundances from four to seven. A large star-to-star scatter is
detected for both of these elements, highlighting the need for more
detections enabling further investigations, specifically into possible
non-LTE (local thermodynamical equilibrium) effects.
Description:
Atomic data and abundances for individual lines analysed.
Objects:
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RA (2000) DE Designation(s)
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05 38 32.95 -59 04 28.1 2MASS J05383296-5904280 = CD-59 1105
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 46 545 Atomic data and abundances for individual lines
analysed
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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2- 8 F7.2 0.1nm Wave Wavelength in Angstroms
11- 14 A4 --- ID Species
17- 20 F4.2 eV ExPot Excitation Potential
24- 28 F5.2 [-] log(gf) Log of oscillator strength
30 A1 --- n_EW [s] s for synth
31- 36 F6.2 0.1pm EW ? Equivalenth width in mili angstroms
38- 42 F5.2 [-] loge(X) Log epsilon abundance of element X
45- 46 I2 --- Ref Reference (1)
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Note (1): References as follows:
1 = NIST (Kramida et al., 2020, National Institute of Standards and
Technology, Gaithersburg, MD)
2 = Pehlivan Rhodin et al. (2017A&A...598A.102P 2017A&A...598A.102P)
3 = NIST (Kramida et al. 2020, National Institute of Standards and Technology,
Gaithersburg, MDfor log(gf) value and VALD (Piskunov et al.,
1995A&AS..112..525P 1995A&AS..112..525P; Pakhomov et al., 2019ARep...63.1010P 2019ARep...63.1010P) for HFS
4 = Trabert et al. (1999..32..537T) for log(gf) value and Roederer & Lawler
(2021ApJ...912..119R 2021ApJ...912..119R) for HFS
5 = Den Hartog et al. (2023ApJS..265...42D 2023ApJS..265...42D)
6 = Den Hartog et al. (2021ApJS..255...27D 2021ApJS..255...27D)
7 = Lawler & Dakin 1989 for logg and Kurucz (2011CaJPh..89..417K 2011CaJPh..89..417K) for HFS;
NOT SURE ABOUT ALL LOGG VALUES don't have access to Lawler & Dakin.
8 = Lawler et al. (2019ApJS..241...21L 2019ApJS..241...21L)
9 = Lawler et al. (2013ApJS..205...11L 2013ApJS..205...11L)
10 = Wood et al. (2013ApJS..208...27W 2013ApJS..208...27W)
11 = Pickering et al. (2001ApJS..132..403P 2001ApJS..132..403P), with corrections given in
Pickering et al. (2002ApJS..138..247P 2002ApJS..138..247P)
12 = Wood et al. (2014ApJS..214...18W 2014ApJS..214...18W) for log(gf) value and HFS
13 = Sobeck et al. (2007ApJ...667.1267S 2007ApJ...667.1267S)
14 = Lawler et al. (2017ApJS..228...10L 2017ApJS..228...10L)
15 = Gurell et al. (2010A&A...511A..68G 2010A&A...511A..68G)
16 = Nilsson et al. (2006A&A...445.1165N 2006A&A...445.1165N)
17 = Den Hartog et al. (2011ApJS..194...35D 2011ApJS..194...35D) for both log(gf) value and hfs
18 = O'Brian et al. (1991JOSAB...8.1185O 1991JOSAB...8.1185O)
19 = Belmonte et al. (2017ApJ...848..125B 2017ApJ...848..125B)
20 = Den Hartog et al. (2014ApJS..215...23D 2014ApJS..215...23D)
21 = Ruffini et al. (2014MNRAS.441.3127R 2014MNRAS.441.3127R)
22 = Den Hartog et al. (2019ApJS..243...33D 2019ApJS..243...33D)
23 = Melendez & Barbuy (2009A&A...497..611M 2009A&A...497..611M)
24 = Lawler et al. (2015ApJS..220...13L 2015ApJS..220...13L) for log(gf) values and HFS
25 = Lawler et al. (2018ApJS..238....7L 2018ApJS..238....7L) for log(gf) value and Roederer
(2022ApJ...936...84R 2022ApJ...936...84R) for HFS
26 = Wood et al. (2014ApJS..211...20W 2014ApJS..211...20W)
27 = Fedchak & Lawler (1999ApJ...523..734F 1999ApJ...523..734F)
28 = Roederer & Lawler (2012ApJ...750...76R 2012ApJ...750...76R )
29 = Biemont et al. (2011MNRAS.414.3350B 2011MNRAS.414.3350B)
30 = Ljung et al. (2006A&A...456.1181L 2006A&A...456.1181L)
31 = Malcheva et al. (2006MNRAS.367..754M 2006MNRAS.367..754M)
32 = Nilsson et al. (2010A&A...511A..16N 2010A&A...511A..16N) including HFS
33 = Sikstrom et al. (2001JPhB...34..477S 2001JPhB...34..477S)
34 = Xu et al. (2004PhRvA..70d2508X 2004PhRvA..70d2508X)
35 = Kramida et al. (2018, in APS Meeting Abstracts, Vol. 2018, APS Division of
Atomic, Molecular and Optical Physics Meeting Abstracts, M01.004)
NIST Atomic Spectra Database (ver. 5.5.6), using HFS/IS using when
available
(NOTE: I don't know where the HFS/IS for the 6496 line comes from!)
36 = Lawler et al. (2001ApJ...556..452L 2001ApJ...556..452L), using HFS from Ivans et al.
(2006ApJ...645..613I 2006ApJ...645..613I) when available
37 = Lawler et al. (2009ApJS..182...51L 2009ApJS..182...51L)
38 = Li et al. (2007PhyS...76..577L 2007PhyS...76..577L), using HFS from Sneden et al.
(2009ApJS..182...80S 2009ApJS..182...80S)
39 = Den Hartog et al. (2003ApJS..148..543D 2003ApJS..148..543D), using HFS/IS from
Roederer et al. (2008ApJ...675..723R 2008ApJ...675..723R) when available
40 = Lawler et al. (2006ApJS..162..227L 2006ApJS..162..227L), using HFS/IS from
Roederer et al. (2008ApJ...675..723R 2008ApJ...675..723R) when available
41 = Lawler et al. (2001ApJ...563.1075L 2001ApJ...563.1075L), using HFS/IS from
Ivans et al. (2006ApJ...645..613I 2006ApJ...645..613I)
42 = Den Hartog et al. (2006ApJS..167..292D 2006ApJS..167..292D)
43 = Lawler et al. (2001ApJS..137..341L 2001ApJS..137..341L), using HFS from
Lawler et al. (2001ApJS..137..351L 2001ApJS..137..351L)
44 = Wickliffe et al. (2000JQSRT..66..363W 2000JQSRT..66..363W)
45 = Lawler et al. (2004ApJ...604..850L 2004ApJ...604..850L), using HFS from
Lawler et al. (2009ApJS..182...51L 2009ApJS..182...51L)
46 = Lawler et al. (2008ApJS..178...71L 2008ApJS..178...71L)
47 = Wickliffe & Lawler (1997JOSAB..14..737W 1997JOSAB..14..737W)
48 = Sneden et al. (2009ApJS..182...80S 2009ApJS..182...80S) for log(gf) value and HFS/IS
49 = Roederer et al. (2010ApJ...714L.123R 2010ApJ...714L.123R) for log(gf) value and
Den Hartog et al. (2020ApJS..248...10D 2020ApJS..248...10D) for HFS
50 = Den Hartog et al. (2021ApJS..254....5D 2021ApJS..254....5D)
51 = Lawler et al. (2007ApJS..169..120L 2007ApJS..169..120L)
52 = Ivarsson et al. (2004A&A...425..353I 2004A&A...425..353I)
53 = Den Hartog et al. (2005ApJ...619..639D 2005ApJ...619..639D) for log(gf) value and HFS/IS
54 = Den Hartog et al. (2005ApJ...619..639D 2005ApJ...619..639D) for log(gf) value only
55 = Hannaford et al. (1981JPhB...14.2321H 1981JPhB...14.2321H) for log(gf) value and
Demidov et al. (2021PhRvA.103c2824D 2021PhRvA.103c2824D) for HFS
56 = Nilsson et al. (2002A&A...382..368N 2002A&A...382..368N)
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Acknowledgements:
Terese T. Hansen, thidemannhansen(at)gmail.com
(End) Patricia Vannier [CDS] 24-Mar-2025