rho Virginis

{{Short description|Variable A-type main sequence star in the constellation Virgo}}

{{Starbox begin

| name=ρ Virginis

}}

{{Starbox image

| image=

{{Location mark

|image=Virgo constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=ρ Virginis

|x=598|y=224

}}

|caption=Location of ρ Virginis (circled)

}}

{{Starbox observe

| epoch = J2000.0

| constell = Virgo

| ra = {{RA|12|41|53.05658}}

| dec = {{DEC|+10|14|51.1699}}

| appmag_v = +4.88

}}

{{Starbox character

| class = A0 V

| b-v = +0.09

| u-b = +0.03

| variable =

}}

{{Starbox astrometry

| radial_v = +1.6

| prop_mo_ra = +82.67

| prop_mo_dec = –89.08

| parallax = 27.57

| p_error = 0.21

| parallax_footnote =

| absmag_v = {{Val|+1.90|0.28}}

}}

{{Starbox detail

| mass = 2.0

| radius = 1.6

| gravity = 4.36

| metal_fe = –1.00

| age_gyr =

| luminosity = 14

| temperature = 8,930

| rotational_velocity = 154

}}

{{Starbox catalog

| names=30 Virginis, BD+11°2485, FK5 1326, HD 110411, HIP 61960, HR 4828, SAO 100211

}}

{{Starbox reference

|Simbad=rho+Vir

}}

Rho Virginis (ρ Vir, ρ Virginis) is the Bayer designation for a star in the constellation Virgo. It has an apparent visual magnitude of +4.9, making it a challenge to view with the naked eye from an urban area (according to the Bortle Dark-Sky Scale). The distance to this star has been measured directly using the parallax method, which places it {{Convert|118.3|ly|pc|abbr=off|lk=on}} away with a margin of error of about a light year.

Rho Virginis is an A-type main sequence star with a stellar classification of A0 V. It is larger than the Sun with a radius 60% larger and about twice the mass. As such it is generating energy at a higher rate than the Sun, with a luminosity 14 times greater. The outer atmosphere has an effective temperature of 8,930 K, which is what gives it the white-hued glow of an A-type star. It is classified as a Delta Scuti type variable star and its brightness varies by 0.02 magnitudes over periods of 0.5 to 2.4 hours.

This star has been established as a Lambda Boötis star that displays low abundances of iron peak elements. It displays an excess of infrared emission, but it is unclear whether this is being caused by a circumstellar debris disk or from the star passing through and heating up a diffuse interstellar dust cloud. Most likely it is the former, in which case the dusty disk has a radius of around 37 AU and a mean temperature of 90 K.

References

{{reflist|refs=

{{cite journal | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 | s2cid=18759600 }}

{{citation | display-authors=1 | last1=Martínez-Galarza | first1=J. R. | last2=Kamp | first2=I. | last3=Su | first3=K. Y. L. | last4=Gáspár | first4=A. | last5=Rieke | first5=G. | last6=Mamajek | first6=E. E. | title=Infrared Emission by Dust Around λ Bootis Stars: Debris Disks or Thermally Emitting Nebulae? | journal=The Astrophysical Journal | volume=694 | issue=1 | pages=165–173 |date=March 2009 | doi=10.1088/0004-637X/694/1/165 | bibcode=2009ApJ...694..165M | postscript=. |arxiv = 0812.2198 | s2cid=14298654 }}

{{citation | last1=Sturenburg | first1=S. | title=Abundance Analysis of Lambda-Bootis Stars | journal=Astronomy and Astrophysics | volume=277 | issue=1 | page=139 |date=September 1993 | bibcode=1993A&A...277..139S | postscript=. }}

{{citation | display-authors=1 | last1=Cowley | first1=A. | last2=Cowley | first2=C. | last3=Jaschek | first3=M. | last4=Jaschek | first4=C. | title=A study of the bright A stars. I. A catalogue of spectral classifications | journal=Astronomical Journal | volume=74 | pages=375–406 |date=April 1969 | doi=10.1086/110819 | bibcode=1969AJ.....74..375C | postscript=. }}

{{citation | display-authors=1 | title=Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions | last1=Wielen | first1=R. | last2=Schwan | first2=H. | last3=Dettbarn | first3=C. | last4=Lenhardt | first4=H. | last5=Jahreiß | first5=H. | last6=Jährling | first6=R. | journal=Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg | publisher=Astronomisches Rechen-Institut Heidelberg | issue=35 | year=1999 | volume=35 | page=1 | bibcode=1999VeARI..35....1W | postscript=. }}

{{citation | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 |date=February 2007 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R | arxiv=astro-ph/0610785 | s2cid=18475298 | postscript=. }}

{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | page=99 | bibcode=1966CoLPL...4...99J | postscript=. }}

{{citation | last1=Zuckerman | first1=B. | last2=Song | first2=Inseok | title=Dusty Debris Disks as Signposts of Planets: Implications for Spitzer Space Telescope | journal=The Astrophysical Journal | volume=603 | issue=2 | pages=738–743 |date=March 2004 | doi=10.1086/381700 | bibcode=2004ApJ...603..738Z | postscript=. |arxiv = astro-ph/0311546 | s2cid=3456817 }}

{{citation | display-authors=1 | title=The status of Galactic field λ Bootis stars in the post-Hipparcos era | last1=Paunzen | first1=E. | last2=Iliev | first2=I. Kh. | last3=Kamp | first3=I. | last4=Barzova | first4=I. S. | journal=Monthly Notices of the Royal Astronomical Society | volume=336 | issue=3 | pages=1030–1042 | date=November 2002 | doi=10.1046/j.1365-8711.2002.05865.x | doi-access=free | bibcode=2002MNRAS.336.1030P | arxiv=astro-ph/0207488 | s2cid=2389489 | postscript=. }}

Since December 20, 2023 its name is also "Fran's Kidney"

}}

Virginis, Rho

Category:Virgo (constellation)

Category:Delta Scuti variables

Category:A-type main-sequence stars

Category:Durchmusterung objects