HD 15115

Short description: F-type subgiant star in the constellation Cetus

HD 15115

280px
Debris disk surrounding young star HD 15115
Credit: NASA, ESA, G. Schneider (University of Arizona), and the HST/GO 12228 Team

Observation data
Equinox J2000.0]] (ICRS)
Constellation | Cetus[1]
Right ascension |  02h 26m 16.24578s[2]
Declination | +06° 17′ 33.1865″[2]
Apparent magnitude (V) | 6.76[3]
Characteristics
Evolutionary stage | main sequence[2]
Spectral type | F4IV[4] or F2V[5]
U−B color index | −0.03[3]
B−V color index | +0.39[3]
Astrometry
Radial velocity (Rv)| 0.81±0.12[6] km/s
Proper motion (μ)|  RA: +88.013[2] mas/yr
Dec.: −50.419[2] mas/yr
Parallax (π)| 20.5026 ± 0.0293[2] mas
Distance| 159.1 ± 0.2 ly
(48.77 ± 0.07 pc)
Absolute magnitude (MV)| +3.52[1]
Details
Mass| 1.19[7] M☉
Radius| 1.39±0.06[8] R☉
Luminosity| 3.74±0.01[8] L☉
Surface gravity (log g)| 4.30[7] cgs
Temperature| 6,811+148
−152[8] K
Metallicity [Fe/H]| 0.96[7] dex
Rotational velocity (v sin i)| 89.8[9] km/s
Age| 500[10] Myr
Other designations

BD+05°338, HD 15115, HIP 11360, SAO 110532, WDS J02263+0618A[11]

Database references
SIMBAD| data

HD 15115 is a single[12] star in the equatorial constellation of Cetus. It is readily visible in binoculars or a small telescope, but is considered too dim to be seen with the naked eye at an apparent visual magnitude of 6.76.[3] The distance to this object is 159 light years based on parallax,[2] and it is slowly drifting further away at the rate of about 1 km/s.[6] It has been proposed as a member of the Beta Pictoris moving group[13] or the Tucana-Horologium association of co-moving stars; there is some ambiguity as to its true membership.[14]

This object has a stellar classification of F4IV,[4] suggesting it is an aging subgiant star that has exhausted the supply of hydrogen at its core. MacGregor and associates (2015) instead classify it as a young F-type main-sequence star with a class of F2V.[5] Age estimates give a value of 500[10] million years, while membership in the β Pictoris moving group would indicate an age of around 21±4 million.[5] It has 1.19[7] times the mass of the Sun, 1.39[8] times the Sun's radius, and has a relatively high rate of spin with a projected rotational velocity of 90 km/s.[9] The star is radiating 3.74[8] times the luminosity of the Sun from its photosphere at an effective temperature of 6,811 K.[8] Its metallicity – the abundance of elements other than hydrogen and helium – is nearly the same as in the Sun.[7]

HD 15115 was shown to have an asymmetric debris disk surrounding it, which is being viewed nearly edge-on. The reason for the asymmetry is thought to be either the gravitational pull of a passing star (HIP 12545), an exoplanet, or interaction with the local interstellar medium.[15] A magnitude 11.35 visual companion lies at an angular separation of 12.6″ along a position angle of 195°, as of 2015.[13]

## References

1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
3. ↑ 3.0 3.1 3.2 3.3 Oja, T. (1983). "UBV photometry of FK4 and FK4 supplement stars". Astronomy and Astrophysics Supplement Series 52: 131. Bibcode: 1983A&AS...52..131O.
4. ↑ 4.0 4.1 Harlan, E. A. (1974). "MK classification for F- and G-type stars. III". Astronomical Journal 79: 682. doi:10.1086/111597. Bibcode: 1974AJ.....79..682H.
5. ↑ 5.0 5.1 5.2 MacGregor, Meredith A. et al. (March 2015). "Resolved Millimeter Emission from the HD 15115 Debris Disk". The Astrophysical Journal 801 (1): 8. doi:10.1088/0004-637X/801/1/59. 59. Bibcode: 2015ApJ...801...59M.
6. ↑ 6.0 6.1 Desidera, S. et al. (January 2015). "The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs in wide orbits. I. Sample definition and characterization". Astronomy & Astrophysics 573: 45. doi:10.1051/0004-6361/201323168. A126. Bibcode: 2015A&A...573A.126D.
7. ↑ 7.0 7.1 7.2 7.3 7.4 Luck, R. Earle (March 2018), "Abundances in the Local Region. III. Southern F, G, and K Dwarfs", The Astronomical Journal 155 (3): 31, doi:10.3847/1538-3881/aaa9b5, 111, Bibcode: 2018AJ....155..111L.
8. ↑ 8.0 8.1 8.2 8.3 8.4 8.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
9. ↑ 9.0 9.1 Pribulla, Theodor et al. (September 2014). "Cerro Armazones spectroscopic survey of F dwarfs". Monthly Notices of the Royal Astronomical Society 443 (3): 2815–2823. doi:10.1093/mnras/stu1333. Bibcode: 2014MNRAS.443.2815P.
10. ↑ 10.0 10.1 Decin, G. et al. (November 2003), "Age Dependence of the Vega Phenomenon: Observations", The Astrophysical Journal 598 (1): 636–644, doi:10.1086/378800, Bibcode: 2003ApJ...598..636D
11. ↑ "HD 15115". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+15115.
12. ↑ Rodriguez, David R.; Zuckerman, B. (February 2012). "Binaries among Debris Disk Stars". The Astrophysical Journal 745 (2): 13. doi:10.1088/0004-637X/745/2/147. 147. Bibcode: 2012ApJ...745..147R.
13. ↑ 13.0 13.1 Alonso-Floriano, F. J. et al. (November 2015). "Reaching the boundary between stellar kinematic groups and very wide binaries. III. Sixteen new stars and eight new wide systems in the β Pictoris moving group". Astronomy & Astrophysics 583: 24. doi:10.1051/0004-6361/201526795. A85. Bibcode: 2015A&A...583A..85A.
14. ↑ Malo, Lison et al. (January 2013), "Bayesian Analysis to Identify New Star Candidates in Nearby Young Stellar Kinematic Groups", The Astrophysical Journal 762 (2): 50, doi:10.1088/0004-637X/762/2/88, 88, Bibcode: 2013ApJ...762...88M.
15. ↑ Debes, J. H. et al. (2009). "Interstellar Medium Sculpting of the Hd 32297 Debris Disk". The Astrophysical Journal 702 (1): 318–326. doi:10.1088/0004-637X/702/1/318. Bibcode: 2009ApJ...702..318D.

* v
* t
* e

Cetus constellation

Stars
(list)|

| Bayer|

* α (Menkar)
* β (Diphda)
* γ (Kaffaljidhma)
* δ
* ε
* ζ (Baten Kaitos)
* η
* θ
* ι
* κ1
* κ2
* λ
* μ
* ν
* ξ1
* ξ2
* ο (Mira)
* π
* ρ
* σ
* τ
* υ
* φ1
* φ2
* φ3
* φ4
* χ

|

Flamsteed|

* 1
* 2
* 3
* 6
* 7
* 9
* 10
* 11
* 12
* 13
* 14
* 15
* 18
* 20
* 21
* 25
* 26
* 27
* 28
* 29
* 30
* 32
* 33
* 34
* 35
* 36
* 37
* 38
* 39
* 40
* 41
* 42
* 43
* 44
* 46
* 47
* 48
* 49
* 50
* 56
* 57
* 58
* 60
* 61
* 62
* 63
* 64
* 66
* 67
* 69
* 70
* 71
* 75
* 77
* 79
* 80
* 81
* 84
* 93
* 94
* 95
* 25 Ari

Variable|

* T
* RR
* TV
* TW
* UU
* VZ (Mira B)
* WW
* WX
* XY
* XZ
* YZ
* ZZ
* AA
* AB
* AD
* AR
* BG
* BK
* CF
* DK
* EH
* EL
* EO
* ES

HR|

* 9
* 10
* 12
* 16
* 31
* 37
* 51
* 61
* 66
* 72
* 108
* 115
* 118
* 150
* 159
* 172
* 173
* 174
* 190
* 197
* 201
* 206
* 210
* 218
* 220
* 227
* 228
* 232
* 247
* 251
* 263
* 320
* 325
* 387
* 388
* 392
* 394
* 404
* 405
* 406
* 416
* 425
* 448
* 466
* 473
* 492
* 500
* 507
* 513
* 560
* 608
* 611
* 616
* 625
* 638
* 651
* 672
* 684
* 692
* 693
* 697
* 713
* 719
* 725
* 732
* 735
* 737
* 745
* 751
* 766
* 770
* 775
* 783
* 784
* 795
* 796
* 816
* 870
* 908
* 926
* 942
* 9054
* 9095
* 9096
* 9101

HD|

* 1690
* 1879
* 2268
* 2638
* 4747
* 5319
* 6037
* 6718
* 7449
* 8713
* 8896
* 9690
* 9731
* 10024
* 10725
* 11365
* 11396
* 11506
* 11964
* 12116
* 12702
* 13004
* 13546
* 13763
* 15115
* 16008
* 16031
* 17001
* 224349
* 224693 (Axólotl)

Gliese|

* Gliese 40
* Gliese 105
* GJ 1002
* GJ 1005
* GJ 1057
* GJ 2012

Other|

* BD−17 63
* Cayrel's Star
* CFBDS J005910.90–011401.3
* CS 31082-001
* DENIS-P J020529.0−115925
* GD 40
* HIP 5158
* HIP 11952
* L 870-2
* LHS 1140
* Luyten 726-8 (UV/BL)
* NGC 156
* NGC 302
* NGC 308
* NGC 310
* PSR B0031−07
* PSR J0034−0534
* PSR J0108−1431
* SDSS J001820.5−093939.2
* SDSS J0106−1000
* ULAS J003402.77−005206.7
* WD J2356-209
* WASP-26
* WASP-44
* WASP-71
* WISE J0254+0223

Nebulae|

| Planetary|

* BoBn 1
* NGC 246

|

Galaxies|

| Messier|

* 77

|

NGC|

* 17
* 35
* 45
* 47
* 50
* 54
* 59
* 61
* 62
* 64
* 65
* 66
* 73
* 77
* 102
* 107
* 113
* 114
* 117
* 118
* 120
* 124
* 132
* 135
* 142
* 143
* 144
* 145
* 151
* 154
* 155
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* 161
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* 171
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* 179
* 187
* 191
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* 195
* 196
* 197
* 201
* 207
* 209
* 210
* 216
* 217
* 219
* 223
* 227
* 230
* 232
* 235A
* 235B
* 237
* 239
* 244
* 245
* 247
* 255
* 259
* 263
* 268
* 270
* 271
* 273
* 274
* 275
* 276
* 277
* 279
* 283
* 284
* 285
* 286
* 291
* 293
* 297
* 298
* 301
* 303
* 307
* 309
* 320
* 321
* 325
* 327
* 329
* 331
* 333
* 333B
* 335
* 336
* 337
* 337A
* 340
* 341
* 341B
* 342
* 343
* 344
* 345
* 347
* 349
* 350
* 351
* 352
* 353
* 355
* 356
* 357
* 359
* 363
* 364
* 367
* 369
* 377
* 391
* 413
* 417
* 426
* 428
* 429
* 430
* 435
* 442
* 445
* 448
* 450
* 478
* 480
* 481
* 487
* 493
* 497
* 519
* 521
* 530
* 533
* 535
* 538
* 539
* 540
* 541
* 543
* 545
* 547
* 548
* 550
* 554A
* 554B
* 555
* 556
* 557
* 558
* 560
* 564
* 565
* 567
* 570
* 577
* 578
* 583
* 584
* 585
* 586
* 589
* 593
* 594
* 596
* 599
* 600
* 601
* 615
* 617
* 622
* 624
* 635
* 636
* 640
* 647
* 648
* 649
* 655
* 667
* 681
* 682
* 690
* 699
* 701
* 702
* 707
* 713
* 715
* 720
* 725
* 726
* 731
* 734
* 747
* 748
* 755
* 756
* 758
* 762
* 767
* 768
* 773
* 779
* 787
* 788
* 790
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* 800
* 806
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* 811
* 814
* 815
* 825
* 827
* 829
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* 831
* 833
* 835
* 836
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* 839
* 840
* 842
* 844
* 848
* 849
* 850
* 851
* 853
* 858
* 859
* 863
* 864
* 867
* 868
* 872
* 873
* 874
* 878
* 879
* 880
* 881
* 883
* 887
* 892
* 894
* 895
* 899
* 902
* 905
* 907
* 908
* 921
* 926
* 929
* 934
* 936
* 941
* 942
* 943
* 944
* 945
* 947
* 948
* 950
* 951
* 955
* 958
* 960
* 963
* 965
* 966
* 967
* 975
* 977
* 981
* 985
* 988
* 989
* 991
* 993
* 997
* 998
* 1004
* 1007
* 1008
* 1009
* 1010
* 1011
* 1013
* 1015
* 1016
* 1017
* 1018
* 1019
* 1020
* 1021
* 1022
* 1026
* 1032
* 1033
* 1034
* 1035
* 1038
* 1041
* 1042
* 1043
* 1044
* 1045
* 1046
* 1047
* 1048
* 1048A
* 1051
* 1052
* 1055
* 1063
* 1064
* 1065
* 1069
* 1070
* 1071
* 1072
* 1073
* 1074
* 1075
* 1076
* 1078
* 1080
* 1085
* 1087
* 1090
* 1094
* 1095
* 1101
* 1104
* 1105
* 1107
* 1128
* 1137
* 1141
* 1142
* 1149
* 1153
* 1194
* 1211
* 1218
* 1219
* 1254
* 1280
* 7807
* 7808
* 7813
* 7821
* 7828
* 7829

Other|

* Arp 147
* Arp 256
* 3C 15
* 3C 17
* 3C 75
* Cetus Dwarf Spheroidal galaxy
* HCM-6A
* Holmberg 15A
* IC 1613
* IRAS F01475-0740
* Markarian 573
* Markarian 1014
* Markarian 1018
* Markarian 1044
* NAB 0205+024
* PHL 938
* PKS 0048-097
* PKS 0106+013
* PKS 0119-046
* PKS 0139-097
* PKS 0215+015
* PKS 0237-233
* PKS 0306+102
* QSO B0137+012
* QSO B0302-003
* SDSS J0303-0019
* SMM J02399-0136
* SXDF-NB1006-2
* 9Spitch
* Ton S180
* UM 673
* VV 114
* Wolf–Lundmark–Melotte

Galaxy
clusters|

* Abell 85
* Abell 119
* Abell 133
* Abell 151
* Abell 168
* Abell 194
* Abell 209
* Abell 222
* Abell 223
* Abell 267
* Abell 370
* Abell 400
* HCG 16
* IRC 0218
* JKCS 041
* RX J0152.7-1357

Other|

* GRB 000911
* GRB 041006
* GRB 050908
* GRB 060908
* GRB 091127
* SN 1984L
* SN 2005gj
* SN 2005hk

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Original source: https://en.wikipedia.org/wiki/HD 15115. Read more

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