2019ApJ...873L...5C

Query : 2019ApJ...873L...5C

2019ApJ...873L...5C - Astrophys. J., 873, L5-L5 (2019/March-1)

Discovery of resolved magnetically split lines in SDSS/APOGEE spectra of 157 Ap/Bp stars.

CHOJNOWSKI S.D., HUBRIG S., HASSELQUIST S., CASTELLI F., WHELAN D.G., MAJEWSKI S.R., NITSCHELM C., GARCIA-HERNANDEZ D.A., STASSUN K.G. and ZAMORA O.

Abstract (from CDS):

We report on magnetic field measurements of 157 chemically peculiar A/B stars (Ap/Bp) based on resolved, magnetically split absorption lines present in H-band spectra provided by the Sloan Digital Sky Survey (SDSS)/Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey. These stars represent the extreme magnetic end of a still-growing sample of >900 Ap/Bp stars selected among the APOGEE telluric standard stars as those with Ce III absorption lines and/or literature Ap/Bp classifications. The lines most frequently resolved into their split components for these stars in the H-band pertain primarily pertain to Ce III, Cr II, Fe I, Mn II, Si I, and Ca II, in addition to one or more unidentified ions. Using mean magnetic field modulus (<B>) estimates for transitions with known Lande factors, we estimate effective Lande factors for 5 Ce III lines and 15 unknown lines and proceed to measure <B>of 157 stars, only 3 of which have previous literature estimates of <B>. This 183% increase in the number of Ap/Bp stars for which <B>has been measured is a result of the large number of stars observed by SDSS/APOGEE, extension of high-resolution Ap/Bp star observations to fainter magnitudes, and the advantages of long wavelengths for resolving magnetically split lines. With <B>∼ 25 kG, the star 2MASS J02563098+4534239 is currently the most magnetic star of the SDSS/APOGEE sample. Effective Lande factors, representative line profiles, and magnetic field moduli are presented. The validity of the results is supported using optical, high-resolution, follow-up spectra for 29 of the stars.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): atomic data - infrared: stars - stars: chemically peculiar - stars: magnetic field

VizieR on-line data: <Available at CDS (J/ApJ/873/L5): table1.dat table2.dat>

Errata: erratum vol.876, art. L34 (2019)

Simbad objects: 160

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Number of rows : 160
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 HD 225114 Pe* 00 03 38.1066127704 +70 18 21.708138024   8.08 8.10     A0pSrCrSi 17 0
2 TYC 4306-1062-1 * 00 10 27.0350567016 +73 37 03.629398800   11.28 10.83     ~ 6 0
3 TYC 4299-696-1 * 00 28 30.6233160600 +69 47 47.294098332   10.97 10.57     ~ 6 0
4 TYC 4615-2915-1 * 00 28 40.3654016880 +84 18 31.276125648   11.11 11.02     ~ 5 0
5 HD 2887 Pe* 00 32 33.6762291048 +55 12 53.044313328   8.49 8.39     A0VpSr 32 0
6 TYC 3662-378-1 Pe* 00 33 18.4752189288 +57 16 16.795748568   10.82 10.58     B9IVSi 8 0
7 TYC 3676-505-1 * 00 56 41.4568619088 +57 39 25.589805336   11.38 11.16     ~ 5 0
8 TYC 4021-632-1 Pe* 00 58 48.7051551120 +62 40 56.268298380   11.83 11.15     A2:pEu 5 0
9 TYC 4308-1403-1 Pu* 01 02 30.3283754232 +74 38 48.767791416   11.15 10.64     ~ 4 0
10 TYC 3271-1597-1 Pe* 01 05 22.4177408832 +50 10 29.601046740   10.61 10.49     B9VSi 8 0
11 TYC 3681-1528-1 * 01 18 42.6645645960 +58 44 43.447474464   10.55 10.39     ~ 8 0
12 HD 8700 * 01 22 59.7154703136 -73 35 01.997948400   9.60 9.55     ApSi 24 0
13 BD+62 352 Pu* 02 08 46.7122858032 +62 40 52.039492860   10.40 10.24     ~ 11 0
14 HD 13404 * 02 11 54.0254584512 +36 57 58.250262528   9.14 8.74     ~ 22 0
15 V* V436 And a2* 02 21 02.6744002704 +42 56 38.228602596   7.24 7.27     B9pSrCrEu 74 0
16 HD 14873 Pe* 02 25 29.9404976712 +47 59 11.708770992   9.34 9.08     A5pSrCr 10 0
17 BD+60 562 Pu* 02 45 17.9264632128 +61 12 35.277181848   11.18 10.52     A2 16 1
18 TYC 47-76-1 * 02 46 32.4037956024 +00 01 14.636543880   11.30 11.04     ~ 6 0
19 BD+64 352 Pe* 02 51 15.4496808216 +64 47 56.100792948   9.70 9.52     B8pSi 8 0
20 TYC 3297-975-1 Pe* 02 56 30.9873837504 +45 34 23.840910912   11.30 10.74     A5:pEuSrCrSi 6 0
21 HD 18410 Pe* 02 59 45.2750976768 +54 19 44.961948300   9.36 9.14     B9VSi 33 0
22 TYC 2859-794-1 * 03 00 19.5943888848 +43 55 25.431263832   11.84 11.46     ~ 7 0
23 HD 237049 * 03 01 03.4086354912 +58 16 54.498902520   9.56 9.29     A2 10 0
24 TYC 2859-1418-1 * 03 08 09.0644452128 +43 55 58.611709416   11.62 11.17     ~ 6 0
25 TYC 4053-630-1 Pe* 03 11 21.0266701704 +63 10 39.382614084   10.32 10.15     B9pSiCr 15 0
26 Cl Melotte 20 905 Pu* 03 30 29.6712107448 +47 15 08.833407624   11.84 11.31     ~ 7 0
27 TYC 1799-1426-1 Pe* 03 41 47.6152323432 +23 35 30.598878588   12.01 10.99     A6pEuSrSiCr 12 0
28 HD 25092 Pe* 04 01 16.6290402528 +46 55 13.539728964   9.69 9.43     A3pEuSrCrSi 9 0
29 BD+57 764 Pu* 04 01 37.9407485496 +57 36 15.921872424   10.12 9.91     B9 8 0
30 HD 279277 Pe* 04 02 13.7392305024 +37 09 57.145499316 13 10.98 10.66     M5III 14 0
31 HD 25706 Pe* 04 06 42.3458551152 +45 46 40.884354480   10.31 10.14     B9VSi 16 0
32 TYC 3718-1499-1 * 04 09 37.1895973032 +53 02 06.253830708   11.40 11.08     ~ 6 0
33 TYC 3336-982-1 EB* 04 14 03.7088536512 +49 41 10.765657824   12.36 12.09     B9II-IIISi 9 0
34 V* V1140 Tau a2* 04 20 37.7861065824 +28 53 31.244361108   8.18 7.92     B9/A0 69 0
35 HD 282151 * 04 29 41.9932170288 +30 41 02.545263384   10.96 10.67 10.660   B9 12 0
36 TYC 4086-1878-1 * 04 43 41.3300938632 +63 56 29.239060524   11.37 11.10     ~ 5 0
37 HD 31552 * 04 58 01.3557264192 +30 07 32.616960384   8.09 7.95     A0 9 0
38 HD 31629 gD* 05 01 32.9633507160 +63 01 16.189761972   9.04 8.95     A0 12 0
39 V* HZ Aur a2* 05 06 08.3584818960 +33 55 07.279039380   7.03 7.07     B9p 194 0
40 HD 241957 * 05 14 54.5383213560 +16 05 11.915611152   10.16 9.88 9.79   A3 10 0
41 HD 241843 Pe* 05 15 10.4399198592 +33 00 47.976329412   10.57 10.29     B9VSi 12 0
42 HD 243096 Pe* 05 22 54.9310142496 +13 46 38.792473932   11.49 10.92     A1IVSrSi 12 0
43 HD 35379 * 05 25 38.0971494264 +30 41 14.180228664   8.866 8.913 8.913   ~ 19 0
44 TYC 4085-1776-1 * 05 25 48.4102618128 +62 16 03.651005604   11.61 11.52     ~ 6 0
45 TYC 2914-1134-1 * 05 33 19.8669613104 +40 13 45.550881696   10.69 10.36     ~ 6 0
46 TYC 1852-651-1 * 05 33 23.5021164624 +26 06 57.395567808   12.08 12.34     ~ 6 0
47 HD 36644 * 05 33 45.3783546168 +12 38 12.069144780   9.71 9.34     A0 13 0
48 HD 245261 Pe* 05 36 36.3907981176 +30 55 20.521895412   11.290 11.044 11.091   B9VSi 9 0
49 TYC 2417-4-1 * 05 45 14.2507263264 +36 54 50.963104368   11.45 11.42     ~ 7 0
50 HD 38586 Y*? 05 47 25.2291803328 +12 38 53.199774348   8.58 8.63     B9VSi 14 0
51 HD 247628 Pe* 05 48 19.7677903680 +33 35 16.982751768   10.85 10.59     kA3hA6mA8SiEu 15 0
52 TYC 120-185-1 * 05 48 21.2518016352 +03 05 16.062995328   12.06 11.40     ~ 6 0
53 V* V1054 Ori a2* 05 48 25.5041382456 -00 45 34.610849136   7.69       ApSrEuCr 71 0
54 TYC 3750-928-1 Pe* 05 51 08.2558582800 +53 16 10.875236232   12.06 11.40     A1IV-VSrSiEu 8 0
55 HD 41613 * 05 55 50.7380474136 -77 50 43.863367380   10.00 9.67     ApEuCr 16 0
56 TYC 2423-267-1 Pe* 06 01 01.1689249584 +32 14 53.864610540   11.25 10.75     A0IVSrSi 7 0
57 TYC 1321-1213-1 * 06 05 56.8183514208 +19 17 13.089181848   10.72 10.64     ~ 5 0
58 HD 251556 Pe* 06 06 21.7962119928 +21 24 35.737141392   10.18 10.17 10.33   B9IV-VSi 13 0
59 TYC 721-523-1 * 06 07 08.7574070640 +10 53 28.202217972   10.96 10.70     ~ 6 0
60 HD 252382 Pe* 06 09 12.4171934856 +20 26 52.846069668   10.71 10.69     A2V 16 0
61 TYC 4357-491-1 * 06 13 01.6152449808 +74 13 40.251711540   11.08 10.86     ~ 5 0
62 TYC 5938-2491-1 * 06 16 35.6204710560 -18 29 38.385510648   11.21 10.81     ~ 7 0
63 HD 291513 * 06 17 17.7344358288 -02 14 31.931618028   10.73 10.73     A2 10 0
64 TYC 3765-681-1 Em* 06 28 51.0980667024 +54 12 29.704509324   10.95 10.77     A1V 6 0
65 HD 46297 * 06 34 01.8526679208 +33 31 39.268335504   8.69 8.58     A2 14 0
66 TYC 2430-1205-1 Pe* 06 35 22.0840235496 +33 51 32.806789848   11.22 11.11     A5IV-VSrSiEu 10 0
67 HD 47074 * 06 36 53.6760523296 +01 18 45.507079008   9.52 9.44     ApCrEuSr 13 0
68 HD 47774 Pe* 06 41 12.6884148528 +24 05 03.437361420   8.68 8.63     A0III-IVSi 19 0
69 HD 263064 * 06 44 45.6842596128 +11 35 34.613334888   10.31 10.29     B8V 12 0
70 HD 50169 Em* 06 51 59.2280506608 -01 38 40.392118428   9.01 8.98     ApEuSrCr 110 0
71 HD 266311 a2* 06 54 58.1690078496 +04 08 27.549217896   9.85 9.74     A0IV-VSrSi 17 0
72 HD 51203 a2* 06 55 09.8346900984 -30 03 43.965577908   10.85 10.37     ApSrEuCr 20 0
73 HD 52628 * 07 05 15.6190991904 +55 42 28.515579912   8.38 8.15     A2 29 0
74 HD 55540 * 07 12 30.4239686832 -21 03 53.772602868   9.39 9.37     ApEuCr 23 0
75 HD 296704 * 07 14 12.6344816208 -03 41 30.006243456   10.13 10.08     B8 10 0
76 TYC 1346-358-1 Pe* 07 16 30.4990869936 +15 19 12.349161804   11.40 11.20     A3pEuSrCrSi 5 0
77 HD 56514 Pe* 07 17 52.8349477296 +13 47 07.850833656   9.50 9.36     A3IVSrSiEu 15 0
78 TYC 775-617-1 Pe* 07 19 41.4212387520 +14 48 16.277703372   11.15 10.83     B8VSi 6 0
79 TYC 8910-1832-1 * 07 26 22.4080265208 -60 26 51.673236432   11.60 10.93     ~ 7 0
80 TYC 8563-764-1 * 07 32 08.9379440832 -59 29 21.655054392   11.24 11.12     ~ 6 0
81 TYC 2962-181-1 Pe* 07 32 09.0528608952 +39 22 43.074743808   11.57 11.07     A5pEuSrCr 6 0
82 BD+47 1470 * 07 39 04.9016977320 +47 11 57.187736628   9.84 9.59     A0 9 0
83 BD+53 1183 * 07 47 05.9429789184 +53 38 19.454049384   10.10 9.92     ApSrCr 14 0
84 HD 63813 Pe* 07 52 41.0909037432 +43 50 14.706323196   10.05 9.75     A1III-IVSrSi 16 0
85 TYC 8147-1121-1 * 07 52 55.2257041632 -52 16 51.893555628   12.26 11.76     ~ 4 0
86 HD 65240 * 07 58 34.2783530376 +20 35 31.638192396   8.87 8.63     A0 10 0
87 TYC 3414-366-1 Pe* 08 05 38.9054312088 +51 21 20.550761604   10.69 10.40     kA2hA4mA7SiEu 7 0
88 HD 68619 * 08 12 47.6383195464 -12 19 28.124056488   10.33 9.89     A8/9V 11 0
89 TYC 2977-1620-1 * 08 17 11.9864749920 +40 18 11.463620652   11.60 11.18     ~ 6 0
90 HD 71860 a2* 08 27 31.1770730352 -49 31 35.290411896   9.50 9.47     ApSiCr 15 0
91 HD 75049 a2* 08 45 33.0714336288 -50 43 58.323425736   9.09 9.14     ApEuCr 36 0
92 HD 98437 * 11 19 35.2524550872 +09 55 56.905315176   9.17 8.88     A3 17 0
93 HD 104505 Pe* 12 02 06.3427537152 +15 20 41.638317900   10.49 10.20     A5pEuSr 8 0
94 CPD-62 2717 * 12 23 12.9840279816 -63 16 32.000726244   10.86 10.42     B8 10 0
95 V* CQ UMa a2* 13 40 21.3848060304 +57 12 27.374885568   6.380 6.273     A2IVpSrCr 124 0
96 HD 139631 a2* 15 40 45.1217128872 -40 04 58.630258812   8.93 8.74     ApEuCrSr 14 0
97 V* LL Lup a2* 16 01 58.8643741128 -37 32 03.725218680   7.48 7.41     ApSi 77 0
98 HD 325559 * 16 24 14.0333433648 -40 44 10.623168564   10.89 10.21 9.95   A0 11 0
99 CD-63 1232 * 16 50 58.3960605840 -63 29 33.112042368   9.69 9.74     ~ 11 0
100 TYC 980-1372-1 * 16 59 59.7726713616 +10 02 29.922839448   11.18 10.84     ~ 6 0
101 HD 154253 * 17 08 08.9964785856 -60 45 03.260615256   9.22 8.99     ApSrCrEu 21 0
102 HD 317652 * 17 29 37.2260976864 -30 30 29.090714652   11.96 12.06     A 8 0
103 HD 159379 a2* 17 35 54.5912942856 -33 50 56.520829608   8.63 8.57     ApSi 24 0
104 UCAC4 342-102489 * 17 38 04.6538350944 -21 46 10.081161984       11.97   ~ 6 0
105 HD 318569 * 17 53 49.1349261480 -33 32 30.862244976   10.66 10.39 10.62   A2 9 0
106 HD 163850 * 17 59 23.2097094048 -26 24 12.387997368   9.49 9.46     B8 12 0
107 TYC 421-935-1 * 17 59 45.2430769421 +03 02 05.781717988   11.32 10.99     ~ 15 0
108 HD 318820 * 18 01 06.7469544984 -31 37 30.026214156   10.23 10.33     A0 10 0
109 HD 165525 Pe* 18 06 15.0691625677 +02 37 30.787652281   10.25 10.25     B9VSi 18 0
110 HD 166808 * 18 13 30.4587018000 -28 15 18.935715060   9.41 9.28     ApSr(CrEu) 21 0
111 UCAC4 457-075953 * 18 15 13.2443438280 +01 21 01.433611872   12.82 12.11 11.94   ~ 5 0
112 UCAC4 452-076467 * 18 17 14.3499609504 +00 13 05.286677376   13.07 12.36 12.25   ~ 6 0
113 BD-06 4760 * 18 26 12.7528981872 -06 46 54.716336184   10.85 10.16     ~ 4 0
114 HD 170565 Pe* 18 30 08.2792427952 -02 35 27.303527040   9.54 9.12     A5pSrEuCrSi 34 0
115 TYC 6857-569-1 * 18 30 50.4133398936 -24 02 15.306562284   11.14 10.83     ~ 6 0
116 BD+17 3622 Pu* 18 32 51.5677300584 +17 18 12.441452904   8.93 8.83     ~ 20 0
117 BD+14 3679 * 18 52 18.4607359629 +14 37 02.074037118   9.62 9.44     A0 8 0
118 HD 177128 Pe* 19 01 32.4908813424 +41 51 59.328242424   9.31 9.11     A2Vp 20 0
119 TYC 3546-1202-1 ** 19 12 04.9479 +48 17 16.547   10.78 10.57 10.62   A2Vp 6 0
120 HD 179711 a2* 19 13 09.4705736280 +12 01 21.626713776   8.37 8.34     ~ 19 0
121 HD 180058 * 19 15 25.8862392000 -11 42 53.672774976   10.11 9.82     A7/8V 23 0
122 TYC 3125-282-1 Pe* 19 18 37.9667474184 +39 47 26.333257056   11.15 11.02     A1Vp 13 0
123 TYC 5142-2803-1 * 19 19 10.2993103560 -06 54 13.101317244   11.68 11.45     ~ 6 0
124 HD 231151 * 19 19 29.9229204144 +15 04 58.780976484   10.57 10.28     ~ 7 0
125 TYC 2665-173-1 * 19 19 55.5052842888 +36 52 56.692899768   10.09 9.95     ~ 5 0
126 BD+50 2787 bC* 19 22 10.4020244328 +50 48 40.131929088   10.16 10.11   10.228 B9II-III 16 0
127 BD-13 5332 * 19 22 49.5930753864 -13 35 30.852013236   10.84 10.82     ~ 9 0
128 TYC 5131-1737-1 * 19 26 51.5772954144 -00 38 42.758347920   11.3 10.8     A0 9 0
129 TYC 5722-1600-1 * 19 29 23.9190445968 -08 57 08.335802412   12.35 11.99     ~ 6 0
130 HD 231627 * 19 30 41.6920421376 +16 21 44.594700948   11.09 10.78     ~ 8 0
131 HD 183735 a2* 19 30 50.6537293560 +01 02 42.139775004   10.21 9.92     ApSrCrEu 22 0
132 HD 353513 * 19 44 37.7652801024 +14 32 09.101784408   10.93 11.01     A1 8 0
133 TYC 3561-1857-1 Pe* 19 46 29.2100561736 +47 37 50.045262924   11.87 11.38 11.45   kA3hA5mA7SiEu 34 0
134 HD 350689 Pu* 19 51 09.6465959568 +18 27 10.144338048   11.49 11.42     B9 10 0
135 HD 188103 Pe* 19 52 56.9967237456 +17 48 54.208789164   8.02 8.02     A0pSiSrEu 26 0
136 TYC 1071-2065-1 * 20 02 09.0383504976 +07 53 28.795299360   11.17 11.00     ~ 7 0
137 HD 346258 * 20 19 18.3252773496 +23 54 02.417109120   10.12 9.91     A2 8 0
138 BD+40 4409 Pe* 21 05 42.8861488056 +40 35 34.608598008   10.20 9.87     A4pEuSrCrSi 10 0
139 V* V2147 Cyg a2* 21 06 36.8839130112 +48 37 40.170235404   8.84 8.84     B8pSi 23 0
140 HD 201612 Pe* 21 09 02.4387510408 +48 44 44.862768924 8.200 8.510 8.590     B9pSiCrEu: 22 0
141 TYC 3593-1718-1 * 21 13 56.8234045368 +47 02 33.615874284   11.96 11.49     ~ 6 0
142 HD 203763 Pe* 21 22 09.4369741728 +56 40 49.099546200   9.27 9.12     A4:pSrCrEu 13 0
143 TYC 3590-1739-1 Pu* 21 28 25.9313886072 +46 47 23.271377280   10.80 10.82     ~ 7 0
144 TYC 3196-875-1 Pe* 21 40 29.6057353872 +43 26 58.626828924   10.91 10.82     A1IVSrSiEu 10 0
145 TYC 3192-1815-1 Pe* 21 43 21.7310720424 +41 51 29.415483360   11.38 11.17     A3IV-VSrSi 7 0
146 TYC 3967-1331-1 Pu* 21 46 09.9147872232 +52 47 36.282274908   11.05 10.77     ~ 6 0
147 BD+57 2400 Pe* 21 48 07.9611557400 +58 02 40.936969140   10.70 10.28     A5pEuSrCrSi 9 0
148 HD 208325 Pe* 21 53 55.0526469864 +54 17 55.045545684   9.12 8.92     A4pSr 9 0
149 HD 209931 Pe* 22 05 46.3130711640 +49 13 58.046199024   9.00 8.99     A0pSiCrSr 12 0
150 HD 210626 Pe* 22 09 45.0302738280 +61 54 36.500504220   9.03 8.94     A0pCrSr 15 0
151 HD 210759 Pe* 22 10 20.2388924400 +66 18 15.083270892   8.11 7.97     A2pCrSrEu 11 0
152 HD 235936 Pe* 22 43 01.8059876040 +51 41 12.354815400   9.62 9.64     B9pCrSiSr 11 0
153 V* GL Lac a2* 22 44 07.5047456400 +55 35 21.211012248   8.85 8.82     kB9hB7HeB8pSi 293 0
154 HD 216001 Pe* 22 48 06.4285647216 +59 06 42.739121592   8.67 8.62     B8pSrSiCr 21 0
155 BD+46 3957 Pe* 23 10 21.2104182120 +47 17 01.735497672   10.93 10.83     kA1hA7mF3SiEu 13 0
156 BSD 19-572 Pe* 23 22 29.4885177312 +60 09 12.204798336   10.56 10.42 10.53   A0pCrEuSrSi 6 0
157 BD+61 2436 Pe* 23 22 35.2374217440 +62 01 04.293223608     9.28     B9pCrSrSi 19 0
158 TYC 3645-984-1 Pe* 23 27 07.5884829312 +49 33 29.013384960   10.68 10.58     A0pSrCr 6 0
159 BD+65 1962 * 23 54 05.3266642584 +66 16 51.191227092   11.09 10.71     ~ 7 0
160 BD+55 3046 Pe* 23 55 43.1846438976 +56 47 32.182760472   9.44 9.33     ~ 12 0

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