HD 92945: Difference between revisions

HD 92945
	; A light curve for V419 Hydrae, plotted over one 13.47 day period, from TESS data
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Hydra
Right ascension	10h 43m 28.2717s
Declination	−29° 03′ 51.421″
Apparent magnitude (V)	7.76
Characteristics
Spectral type	K1V
B−V color index	0.9
Variable type	BY
Astrometry
Radial velocity (Rv)	22.706±0.14 km/s
Proper motion (μ)	RA: -215.484 mas/yr ; Dec.: -49.892 mas/yr
Parallax (π)	46.4931 ± 0.0198 mas
Distance	70.15 ± 0.03 ly ; (21.509 ± 0.009 pc)
Absolute magnitude (MV)	6.07
Details
Mass	0.80 (0.77 to 0.85) M☉
Radius	0.77 R☉
Luminosity	0.38 L☉
Temperature	5000 K
Metallicity [Fe/H]	−0.17 dex
Rotational velocity (v sin i)	4 km/s
Age	294 ± 23 Myr
Other designations
	V419 Hydrae, V419 Hya, CD−28 8394, CPD−28 4175, GJ 3615, HIP 52462, LTT 3932, NLTT 25167, PPM 258065, SAO 179168, 2MASS J10432828-2903513
Database references
SIMBAD	data

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HD 92945 is a K-type main sequence star in the constellation of Hydra.^[2] Its apparent visual magnitude varies by 0.02 magnitudes and is approximately 7.72 at maximum brightness.^[3]

Debris disk

In 2007, a debris disk with estimated dust mass 0.047±0.003 M_E^[8] has been observed around the star by coronagraphic imaging, using the ACS and NICMOS instruments on the Hubble Space Telescope. It appears to extend 45 to 175 astronomical units from HD 92945.^[9]

The disk has a gap at radius 73±3 AU which may be carved by the planet,^[8] but no planet with mass exceeding 1-2 M_J was observed in the gap.^[10]

The HD 92945 planetary system^[8]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period ([[]]s)	Eccentricity	Inclination	Radius
Debris disk	50–140 AU				65.4±0.9°	—

References

^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
^ ^a ^b ^c ^d ^e ^f ^g "V* V419 Hya". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved February 2, 2011.
^ ^a ^b V419 Hya, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars Archived 2017-06-20 at the Wayback Machine, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line February 2, 2011.
^ ^a ^b ^c ^d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ ^a ^b ^c ^d HD 92945, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 2, 2011.
^ ^a ^b ^c Plavchan, Peter; et al. (June 2009), "New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope", The Astrophysical Journal, 698 (2): 1068–1094, arXiv:0904.0819, Bibcode:2009ApJ...698.1068P, doi:10.1088/0004-637X/698/2/1068, S2CID 51417657
^ ^a ^b ^c Marino, S.; Yelverton, B.; Booth, M.; Faramaz, V.; Kennedy, G. M.; Matrà, L.; Wyatt, M. C. (2019), "A gap in HD 92945's broad planetesimal disc revealed by ALMA", Monthly Notices of the Royal Astronomical Society, 484: 1257–1269, arXiv:1901.01406, doi:10.1093/mnras/stz049
^ Observations and Models of the Debris Disk around the K dwarf HD 92945, D. Golimowski et al., Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21st Century, Paul Kalas, ed., June 4–8, 2007, University of California, Berkeley, Bibcode:2007lyot.confE..46G.
^ Mesa, D.; et al. (2021), "Limits on the presence of planets in systems with debris discs: HD 92945 and HD 107146", Monthly Notices of the Royal Astronomical Society, 503: 1276–1289, arXiv:2102.05353, doi:10.1093/mnras/stab438

[MAST-1] "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.

[sb0-2] ^ ^a ^b ^c ^d ^e ^f ^g "V* V419 Hya". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved February 2, 2011.

[gcvs1-3] V419 Hya, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars Archived 2017-06-20 at the Wayback Machine, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line February 2, 2011.

[EDR3-4] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[Anderson2012-5] Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.

[geneva2-6] HD 92945, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 2, 2011.

[apj698_2_1068-7] Plavchan, Peter; et al. (June 2009), "New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope", The Astrophysical Journal, 698 (2): 1068–1094, arXiv:0904.0819, Bibcode:2009ApJ...698.1068P, doi:10.1088/0004-637X/698/2/1068, S2CID 51417657

[Marino2019-8] Marino, S.; Yelverton, B.; Booth, M.; Faramaz, V.; Kennedy, G. M.; Matrà, L.; Wyatt, M. C. (2019), "A gap in HD 92945's broad planetesimal disc revealed by ALMA", Monthly Notices of the Royal Astronomical Society, 484: 1257–1269, arXiv:1901.01406, doi:10.1093/mnras/stz049

[9] Observations and Models of the Debris Disk around the K dwarf HD 92945, D. Golimowski et al., Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21st Century, Paul Kalas, ed., June 4–8, 2007, University of California, Berkeley, Bibcode:2007lyot.confE..46G.

[10] Mesa, D.; et al. (2021), "Limits on the presence of planets in systems with debris discs: HD 92945 and HD 107146", Monthly Notices of the Royal Astronomical Society, 503: 1276–1289, arXiv:2102.05353, doi:10.1093/mnras/stab438

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@@ Line 1: / Line 1: @@
+{{Short description|Star in the constellation Hydra}}
 {{Starbox begin
 | name = [[Henry Draper Catalogue|HD]]&nbsp;92945}}
+{{Starbox image
+| image = [[Image:V419HyaLightCurve.png|250px]]
+| caption = A [[light curve]] for V419 Hydrae, plotted over one 13.47 day period, from [[Transiting Exoplanet Survey Satellite|''TESS'']] data<ref name=MAST/>
+}}
 {{Starbox observe
 | epoch = [[J2000.0]]
 | equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
 | constell = [[Hydra (constellation)|Hydra]]
-| ra = {{RA|10|43|28.2717}}<ref name=sb0>{{SIMBAD link|HD+92945|V* V419 Hya -- Variable of BY Dra type}}, database entry, [[SIMBAD]].  Accessed on line February 2, 2011.</ref>
+| ra = {{RA|10|43|28.2717}}<ref name=sb0>{{cite simbad|title=V* V419 Hya|access-date=February 2, 2011}}</ref>
 | dec = {{DEC|−29|03|51.421}}<ref name=sb0 />
 | appmag_v=7.76<ref name=sb0 />
@@ Line 12: / Line 17: @@
 | class = K1V<ref name=sb0 />
 | b-v = 0.9<ref name=sb0 />
-| variable = BY<ref name=gcvs1>V419 Hya, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars], Sternberg Astronomical Institute, Moscow, Russia.  Accessed on line February 2, 2011.</ref>
+| variable = BY<ref name=gcvs1>V419 Hya, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars] {{Webarchive|url=https://web.archive.org/web/20170620004609/http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat |date=2017-06-20 }}, Sternberg Astronomical Institute, Moscow, Russia.  Accessed on line February 2, 2011.</ref>
 }}
 {{Starbox astrometry
-| radial_v = 22.6&nbsp;±&nbsp;0.3<ref name=sb0 />
+| radial_v = 22.706{{±|0.14}}<ref name=EDR3/>
-| prop_mo_ra = −215.39<ref name=sb0 />
+| prop_mo_ra = -215.484<ref name=EDR3/>
-| prop_mo_dec = −48.50<ref name=sb0 />
+| prop_mo_dec = -49.892<ref name=EDR3/>
-| parallax = 46.36
+| parallax = 46.4931
-| p_error = 0.84
+| p_error = 0.0198
-| parallax_footnote = <ref name=sb0 />
+| parallax_footnote = <ref name=EDR3>{{cite Gaia EDR3|5455707157211784832}}</ref>
-| absmag_v= 6.09<ref>From apparent magnitude and parallax.</ref>
+| absmag_v= 6.07<ref name=Anderson2012>{{citation
+ | title=XHIP: An extended hipparcos compilation
+ | last1=Anderson | first1=E. | last2=Francis | first2=Ch.
+ | journal=Astronomy Letters | arxiv=1108.4971
+ | volume=38 | issue=5 | pages=331 | year=2012
+ | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
+ | s2cid=119257644 | postscript=. }}</ref>
 }}
 {{Starbox detail
@@ Line 27: / Line 38: @@
 | mass = 0.80&nbsp;(0.77&nbsp;to&nbsp;0.85)<ref name=geneva2 />
 | temperature = 5000<ref name=geneva2 />
-| metal = [Fe/H]&nbsp;=&nbsp;−0.17<ref name=geneva2 />
+| metal_fe = −0.17<ref name=geneva2 />
+| age_myr  = {{nowrap|294 ± 23}}<ref name=apj698_2_1068/>
+| radius   = 0.77<ref name=apj698_2_1068/>
+| luminosity = 0.38<ref name=apj698_2_1068/>
 }}
 {{Starbox catalog
-| names=[[Variable star designation|V419&nbsp;Hydrae]], V419&nbsp;Hya, [[Durchmusterung|CD]]−28&nbsp;8394, [[Durchmusterung|CPD]]−28&nbsp;4175, [[Gliese-Jahreiss catalogue|GJ]]&nbsp;3615, [[Hipparcos Catalogue|HIP]]&nbsp;52462, [[Luyten Two-Tenths catalogue|LTT]]&nbsp;3932, [[New Luyten Two-Tenths catalogue|NLTT]]&nbsp;25167, [[PPM Star Catalogue|PPM]]&nbsp;258065, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]]&nbsp;179168.<ref name=sb0 />}}
+| names=[[Variable star designation|V419&nbsp;Hydrae]], V419&nbsp;Hya, [[Durchmusterung|CD]]−28&nbsp;8394, [[Durchmusterung|CPD]]−28&nbsp;4175, [[Gliese-Jahreiss catalogue|GJ]]&nbsp;3615, [[Hipparcos Catalogue|HIP]]&nbsp;52462, [[Luyten Two-Tenths catalogue|LTT]]&nbsp;3932, [[New Luyten Two-Tenths catalogue|NLTT]]&nbsp;25167, [[PPM Star Catalogue|PPM]]&nbsp;258065, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]]&nbsp;179168, [[2MASS]] J10432828-2903513<ref name=sb0 />}}
 {{Starbox reference
 | Simbad=HD+92945}}
 {{Starbox end}}
-'''HD&nbsp;92945''' is a [[K-type star|K-type]] [[main sequence]] [[star]] in the [[constellation]] of [[Hydra (constellation)|Hydra]].<ref name=sb0 />  Its [[apparent visual magnitude]] varies by 0.02 magnitudes and is approximately 7.72 at maximum brightness.<ref name=gcvs1 />  A [[debris disk]] has been observed around the star by [[coronagraphic]] imaging, using the [[Advanced Camera for Surveys|ACS]] and [[Near Infrared Camera and Multi-Object Spectrometer|NICMOS]] instruments on the [[Hubble Space Telescope]].  It appears to extend 45 to 175 [[astronomical unit]]s from HD 92945 and is inclined at approximately 29 degrees.<ref>Observations and Models of the Debris Disk around the K dwarf HD 92945, D. Golimowski et al., ''Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21st Century'', Paul Kalas, ed., June 4–8, 2007, University of California, Berkeley, {{bibcode|2007lyot.confE..46G}}.</ref>
+'''HD&nbsp;92945''' is a [[K-type star|K-type]] [[main sequence]] [[star]] in the [[constellation]] of [[Hydra (constellation)|Hydra]].<ref name=sb0 />  Its [[apparent visual magnitude]] varies by 0.02 magnitudes and is approximately 7.72 at maximum brightness.<ref name=gcvs1 />
+==Debris disk==
+In 2007, a [[debris disk]] with estimated dust mass 0.047{{±|0.003}} {{Earth_mass}}<ref name=Marino2019/> has been observed around the star by [[coronagraphic]] imaging, using the [[Advanced Camera for Surveys|ACS]] and [[Near Infrared Camera and Multi-Object Spectrometer|NICMOS]] instruments on the [[Hubble Space Telescope]].  It appears to extend 45 to 175 [[astronomical unit]]s from HD 92945.<ref>Observations and Models of the Debris Disk around the K dwarf HD 92945, D. Golimowski et al., ''Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21st Century'', Paul Kalas, ed., June 4–8, 2007, University of California, Berkeley, {{bibcode|2007lyot.confE..46G}}.</ref>
+The disk has a gap at radius 73{{±|3}} [[astronomical unit|AU]] which may be carved by the planet,<ref name=Marino2019>{{citation|arxiv=1901.01406|year=2019|title=A gap in HD 92945's broad planetesimal disc revealed by ALMA|doi=10.1093/mnras/stz049|last1=Marino|first1=S.|last2=Yelverton|first2=B.|last3=Booth|first3=M.|last4=Faramaz|first4=V.|last5=Kennedy|first5=G. M.|last6=Matrà|first6=L.|last7=Wyatt|first7=M. C.|journal=Monthly Notices of the Royal Astronomical Society|volume=484|pages=1257–1269|doi-access=free }}</ref> but no planet with mass exceeding 1-2 {{Jupiter_mass}} was observed in the gap.<ref>{{citation|arxiv=2102.05353|year=2021|title=Limits on the presence of planets in systems with debris discs: HD 92945 and HD 107146|last1=Mesa|first1=D.|last2=Marino|first2=S.|last3=Bonavita|first3=M.|last4=Lazzoni|first4=C.|last5=Fontanive|first5=C.|last6=Perez|first6=S.|last7=D'Orazi|first7=V.|last8=Desidera|first8=S.|last9=Gratton|first9=R.|last10=Engler|first10=N.|last11=Henning|first11=T.|last12=Janson|first12=M.|last13=Kral|first13=Q.|last14=Langlois|first14=M.|last15=Messina|first15=S.|last16=Milli|first16=J.|last17=Pawellek|first17=N.|last18=Perrot|first18=C.|last19=Rigliaco|first19=E.|last20=Rickman|first20=E.|last21=Squicciarini|first21=V.|last22=Vigan|first22=A.|last23=Wahhaj|first23=Z.|last24=Zurlo|first24=A.|last25=Boccaletti|first25=A.|last26=Bonnefoy|first26=M.|last27=Chauvin|first27=G.|last28=De Caprio|first28=V.|last29=Feldt|first29=M.|last30=Gluck|first30=L.|journal=Monthly Notices of the Royal Astronomical Society |volume=503 |pages=1276–1289 |doi=10.1093/mnras/stab438 |doi-access=free |display-authors=1}}</ref>
+{{OrbitboxPlanet begin
+| name = HD 92945
+| table_ref = <ref name=Marino2019/>
+| period_unit = <!--Unit for orbital period, defaults to "day" (should be singular form)-->
+}}
+{{OrbitboxPlanet disk
+| disk = Debris disk
+| periapsis = 50
+| apoapsis = 140
+| inclination = 65.4{{±|0.9}}
+}}
+{{Orbitbox end}}
 ==References==
-{{reflist}}
+{{reflist|refs=
+<ref name=apj698_2_1068>{{citation | display-authors=1 | last1=Plavchan | first1=Peter | last2=Werner | first2=M. W. | last3=Chen | first3=C. H. | last4=Stapelfeldt | first4=K. R. | last5=Su | first5=K. Y. L. | last6=Stauffer | first6=J. R. | last7=Song | first7=I. | title=New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope | journal=The Astrophysical Journal | volume=698 | issue=2 | pages=1068–1094 |date=June 2009 | doi=10.1088/0004-637X/698/2/1068 | bibcode=2009ApJ...698.1068P |arxiv = 0904.0819 | s2cid=51417657 }}</ref>
+<ref name=MAST>{{cite web |title=MAST: Barbara A. Mikulski Archive for Space Telescopes |url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html |publisher=Space Telescope Science Institute |access-date=8 December 2021}}</ref>
+}}
+{{Stars of Hydra}}
+{{DEFAULTSORT:HD 92945}}
-[[Category:Hydra constellation]]
-[[Category:K-type main sequence stars]]
+[[Category:Hydra (constellation)]]
+[[Category:K-type main-sequence stars]]
 [[Category:Henry Draper Catalogue objects|092945]]
-[[Category:HIP objects|052462]]
+[[Category:Hipparcos objects|052462]]
 [[Category:Gliese and GJ objects|3615]]
+[[Category:Objects with variable star designations|Hydrae, V419]]
+[[Category:Durchmusterung objects|CPD−28 4175]]
+[[Category:2MASS objects|J10432828-2903513]]
+[[Category:Hypothetical planetary systems]]
+[[Category:Circumstellar disks]]

Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
A light curve for V419 Hydrae, plotted over one 13.47 day period, from TESS data^[1]
Constellation	Hydra
Right ascension	10^h 43^m 28.2717^s^[2]
Declination	−29° 03′ 51.421″^[2]
Apparent magnitude (V)	7.76^[2]
Characteristics
Spectral type	K1V^[2]
B−V color index	0.9^[2]
Variable type	BY^[3]
Astrometry

Radial velocity (R_v)	22.706±0.14^[4] km/s
Proper motion (μ)	RA: -215.484^[4] mas/yr Dec.: -49.892^[4] mas/yr
Parallax (π)	46.4931 ± 0.0198 mas^[4]
Distance	70.15 ± 0.03 ly (21.509 ± 0.009 pc)
Absolute magnitude (M_V)	6.07^[5]

Details

Mass	0.80 (0.77 to 0.85)^[6] `M`_☉
Radius	0.77^[7] `R`_☉
Luminosity	0.38^[7] `L`_☉
Temperature	5000^[6] K
Metallicity [Fe/H]	−0.17^[6] dex
Rotational velocity (v sin i)	4^[6] km/s
Age	294 ± 23^[7] Myr

Other designations
V419 Hydrae, V419 Hya, CD−28 8394, CPD−28 4175, GJ 3615, HIP 52462, LTT 3932, NLTT 25167, PPM 258065, SAO 179168, 2MASS J10432828-2903513^[2]
Database references
SIMBAD	data