HD 131496

Short description: Star in the constellation Boötes

HD 131496 / Arcalís  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Boötes[1]
Right ascension |  14h 53m 23.028s[2]
Declination | +18° 14′ 07.47″[2]
Apparent magnitude (V) | 7.96[3]
Characteristics
Evolutionary stage | subgiant[3]
Spectral type | K0[4]
B−V color index | 1.039±0.013[1]
Astrometry
Radial velocity (Rv)| 1.36±0.16[5] km/s
Proper motion (μ)|  RA: 43.739[2] mas/yr
Dec.: −33.865[2] mas/yr
Parallax (π)| 7.547 ± 0.0246[2] mas
Distance| 432 ± 1 ly
(132.5 ± 0.4 pc)
Absolute magnitude (MV)| 2.8[3]
Details[3]
Mass| 1.61±0.11 M☉
Radius| 4.3±0.1 R☉
Luminosity| 9.8±0.5 L☉
Surface gravity (log g)| 3.3±0.06 cgs
Temperature| 4,927±44 K
Metallicity [Fe/H]| 0.25±0.03 dex
Rotational velocity (v sin i)| 0.48±0.5 km/s
Age| 2.7±0.5 Gyr
Other designations

Arcalís, BD+18°2957, HD 131496, HIP 72845, SAO 101274[6]

Database references
SIMBAD| data
Extrasolar Planets
Encyclopaedia| data

HD 131496 is an evolved subgiant star with an orbiting exoplanet in the constellation Boötes. With an apparent visual magnitude of 7.9 it is too faint to be visible to the naked eye. It is located at a distance of 432 light-years based on parallax measurements,[2] and is drifting further away with a heliocentric radial velocity of 1.4 km/s.[5] At an age of around three billion years, this star has 1.6 times the mass of the Sun and has expanded to 4.3 times the Sun's radius. It is radiating around ten times the luminosity of the Sun from its photosphere at an effective temperature of 4,927 K.[3]

Stars like HD 131496 are sometimes referred to as "retired A-stars", since they would have been A-type stars while on the main sequence. This name is most commonly used in connection with the search for extrasolar planets, where they are useful because these evolved stars are cooler and have more spectral lines than their main sequence counterparts, making planet detection easier.[7]

HD 131496 and its planet, HD 131496b, were chosen as part of the 2019 NameExoWorlds campaign organised by the International Astronomical Union, which assigned each country a star and planet to be named. HD 131496 was assigned to Andorra. The winning proposal for the name of the star was Arcalís, after a mountain peak in northern Andorra where the Sun shines through a gap twice a year at fixed dates, leading to its use as a primitive Solar calendar. The planet was named Madriu, after a glacial valley and river in southeastern Andorra that forms the major part of the Madriu-Perafita-Claror UNESCO World Heritage Site.[8]

## Planetary system

An exoplanet was discovered in 2011. It has a mass at least 2.2 times that of Jupiter and is orbiting at a distance of 2.09 astronomical units (AU) once every 883 days.[3]

The HD 131496 planetary system[9] Companion
(in order from star) | Mass | Semimajor axis
(AU) | Orbital period
(days) | Eccentricity | Inclination | Radius

|
|
|
|
|
|

b / Madriu | ≥2.2±0.2 MJ | 2.09±0.07  | 883±29  | 0.163±0.073  | —  | —

## 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.
2. ↑ 2.0 2.1 2.2 2.3 2.4 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 3.4 3.5 Johnson, John Asher; Clanton, Christian; Howard, Andrew W.; Bowler, Brendan P.; Henry, Gregory W.; Marcy, Geoffrey W.; Crepp, Justin R.; Endl, Michael et al. (2011). "Retired A Stars and Their Companions. VII. 18 New Jovian Planets" (in en). The Astrophysical Journal Supplement Series 197 (2): 26. doi:10.1088/0067-0049/197/2/26. ISSN 0067-0049. Bibcode: 2011ApJS..197...26J.
4. ↑ Cannon, A. J.; Pickering, E. C. (1993). "VizieR Online Data Catalog: Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)". VizieR On-line Data Catalog. Bibcode: 1993yCat.3135....0C.
5. ↑ 5.0 5.1 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.
6. ↑ "HD 131496". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+131496.
7. ↑ Johnson, John Asher; Fischer, Debra A.; Marcy, Geoffrey W.; Wright, Jason T.; Driscoll, Peter; Butler, R. Paul; Hekker, Saskia; Reffert, Sabine et al. (2007). "Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants" (in en). The Astrophysical Journal 665 (1): 785–793. doi:10.1086/519677. ISSN 0004-637X. Bibcode: 2007ApJ...665..785J.
8. ↑ "Andorra" (in en). https://www.nameexoworlds.iau.org/andorra.
9. ↑ HD 131496 b on exoplanet.eu

Coordinates:  14h 53m 23.0283s, +18° 14′ 07.471″

* v
* t
* e

Boötes constellation

Stars (list)|

| Bayer|

* α (Arcturus)
* β (Nekkar)
* γ (Seginus)
* δ (Princeps)
* ε (Izar)
* ζ
* η (Muphrid)
* θ (Asellus Primus)
* ι (Asellus Secundus)
* κ (Asellus Tertius)
* λ (Xuange)
* μ (Alkalurops)
* ν1
* ν2
* ξ
* ο
* π
* ρ
* σ
* τ
* υ
* φ
* χ
* ψ
* ω

|

Flamsteed|

* 1
* 2
* 3
* 6 (e)
* 7
* 9
* 10
* 11
* 12 (d)
* 13
* 14
* 15
* 18
* 20
* 22 (f)
* 24 (g)
* 26
* 31
* 32
* 33
* 34
* 38 (h, Merga)
* 39
* 40
* 44 (i)
* 45 (c)
* 46 (b)
* 47 (k)
* 50
* 101 Vir

Variable|

* R
* S
* T
* V
* RS
* RV
* RX
* SS
* ST
* SW
* TU
* TY
* TZ
* UU
* UY
* UZ
* VW
* XY
* YZ
* ZZ
* AC
* AD
* AR
* BL
* BP
* BX
* BY
* CH
* CI
* CK
* CN
* CP
* CR
* DE
* EF
* EK
* GU
* HN
* HP

HR|

* 5123
* 5129
* 5137
* 5138
* 5156
* 5164
* 5220
* 5243
* 5254
* 5262
* 5270
* 5273
* 5274
* 5310
* 5335
* 5333
* 5346
* 5347
* 5360
* 5361 (A)
* 5363
* 5372
* 5373
* 5374
* 5385
* 5387
* 5388
* 5394
* 5402
* 5416
* 5422
* 5423
* 5433
* 5445
* 5448
* 5454
* 5462
* 5464
* 5467
* 5472
* 5473
* 5483
* 5493
* 5507
* 5510
* 5524
* 5529
* 5532
* 5537
* 5541
* 5550
* 5567
* 5569
* 5574
* 5575
* 5581
* 5592
* 5609
* 5630
* 5633
* 5635
* 5639
* 5640
* 5648
* 5673
* 5674
* 5677
* 5715
* 5716
* 5726
* 5741
* 5752
* 5830
* 5835

HD|

* 119784
* 122443
* 124678
* 125076
* 126307
* 129357
* 131496 (Arcalís)
* 132406
* 132563
* 135944
* 136418

Gliese|

* GJ 526
* Gliese 569

Other|

* CFBDSIR 1458+10
* G 166-45
* GD 165
* HAT-P-4
* LHS 2924
* LkCa 19
* 2MASS 1503+2525
* PSR J1518+4904
* SDSS J1416+1348
* Sigma 1785
* TVLM 513-46546
* WASP-14
* ZTF J153932.16+502738.8

Star clusters|

| Globular|

* NGC 5466

|

Galaxies|

| NGC|

* 5008
* 5239
* 5248
* 5249
* 5251
* 5293
* 5332
* 5405
* 5409
* 5411
* 5414
* 5416
* 5417
* 5418
* 5423
* 5424
* 5431
* 5434
* 5434B
* 5436
* 5437
* 5446
* 5454
* 5456
* 5459
* 5463
* 5463B
* 5469
* 5481
* 5482
* 5487
* 5490
* 5490B
* 5490C
* 5492
* 5497
* 5498
* 5499
* 5500
* 5504
* 5504C
* 5505
* 5508
* 5509
* 5511
* 5511A
* 5512
* 5513
* 5514
* 5514A
* 5515
* 5517
* 5518
* 5520
* 5522
* 5523
* 5525
* 5527
* 5528
* 5529
* 5531
* 5532B
* 5533
* 5535
* 5536
* 5538
* 5539
* 5541
* 5542
* 5543
* 5544
* 5545
* 5546
* 5548
* 5550
* 5553
* 5557
* 5559
* 5562
* 5567
* 5568
* 5570
* 5572
* 5579
* 5581
* 5582
* 5583
* 5587
* 5589
* 5590
* 5591
* 5594
* 5596
* 5598
* 5600
* 5601
* 5602
* 5603
* 5603B
* 5608
* 5609
* 5610
* 5611
* 5613
* 5614
* 5615
* 5616
* 5622
* 5623
* 5624
* 5625
* 5627
* 5628
* 5629
* 5630
* 5633
* 5635
* 5637
* 5639
* 5639B
* 5641
* 5642
* 5644
* 5646
* 5647
* 5649
* 5653
* 5654
* 5655
* 5656
* 5657
* 5659
* 5660
* 5665
* 5665A
* 5666
* 5669
* 5672
* 5673
* 5675
* 5676
* 5677
* 5681
* 5682
* 5683
* 5684
* 5685
* 5686
* 5687
* 5689
* 5693
* 5695
* 5696
* 5697
* 5698
* 5699
* 5700
* 5702
* 5707
* 5708
* 5709
* 5710
* 5711
* 5714
* 5717
* 5720
* 5721
* 5722
* 5723
* 5724
* 5727
* 5730
* 5731
* 5732
* 5735
* 5736
* 5737
* 5739
* 5747
* 5748
* 5751
* 5752
* 5753
* 5754
* 5755
* 5758
* 5759
* 5760
* 5762
* 5763
* 5767
* 5769
* 5771
* 5772
* 5773
* 5778
* 5780
* 5782
* 5784
* 5785
* 5787
* 5788
* 5789
* 5790
* 5794
* 5795
* 5797
* 5798
* 5804
* 5805
* 5818
* 5820
* 5821
* 5827
* 5828
* 5828A
* 5829
* 5830
* 5835
* 5837
* 5842
* 5851
* 5852
* 5853
* 5857
* 5859
* 5860
* 5874
* 5875
* 5875A
* 5876
* 5886
* 5888
* 5889
* 5893
* 5895
* 5896
* 5899
* 5900
* 5902
* 5914
* 5914B
* 5918
* 5923
* 5929
* 5930
* 5932
* 5933
* 5934
* 5935
* 5943
* 5945
* 5947
* 5950
* 5966
* 5992
* 5993

|

Other|

* Arp 302
* Boötes I
* Boötes II
* Boötes III
* 3C 295
* 3C 296
* 3C 299
* 3C 303
* 3C 310
* 3C 315
* 4C 12.50
* 4C 26.42
* 4C 37.43
* CLASS B1359+154
* Cloverleaf quasar
* DDO 187
* DDO 190
* 1E 1415.6+2557
* H1426+428
* IRAS 13349+2438
* IRAS 15250+3609
* Markarian 463
* Markarian 477
* Markarian 478
* Markarian 841
* MS 1512-cB58
* OQ 172
* OQ 208
* OQ 530
* PG 1402+261
* PG 1404+226
* PG 1407+265
* PG 1411+442
* PG 1425+267
* PG 1543+489
* PKS 1413+135
* PKS 1424+240
* PKS 1502+106
* QSO B1400+162
* QSO B1422+202
* QSO B1422+231
* QSO B1504+377
* II Zw 71
* II Zw 73

Galaxy
clusters|

* Abell 1775
* Abell 1795
* Abell 1911
* Abell 1914
* Abell 1983
* Abell 2034
* E 1455+2232
* MS 1512.4+3647

Other|

* Boötes void
* GRB 990123
* GRB 010222
* GRB 050802
* GRB 060814
* GRB 080319B
* SCP 06F6

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/HD 131496. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:HD_131496&oldid=3426960"
*[RA:]: Right Ascension
*[Dec.:]: Declination
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template