G 185-32

{{Starbox begin

| name = G 185-32

}}

{{Starbox image

| image = 250px

| caption = A light curve for PY Vulpeculae, adapted from McGraw et al. (1981)

}}

{{Starbox observe

| epoch = J2000

| constell = Vulpecula

| ra = {{RA|19|37|13.7502}}

| dec = {{DEC|+27|43|18.7366}}

| appmag_v = 13.00{{cite web|url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=38498 |title=PY Vulpeculae|author=VSX|date=4 January 2010|work=AAVSO Website|publisher=American Association of Variable Star Observers|accessdate=19 October 2014}}

}}

{{Starbox character

| class = DA4.0

| appmag_1_passband = J

| appmag_1 = {{val|13.183|0.023}}

| appmag_2_passband = H

| appmag_2 = {{val|13.213|0.029}}

| appmag_3_passband = K

| appmag_3 = {{val|13.329|0.043}}

| b-v = 0.17

| u-b =

| variable = ZZA

}}

{{Starbox astrometry

| radial_v =

| prop_mo_ra = {{val|439.597|0.044}}

| prop_mo_dec = {{val|21.270|0.049}}

| parallax = 54.7742

| p_error = 0.0288

| parallax_footnote =

| absmag_v=11.66

}}

{{Starbox detail

| source =

| mass = {{val|0.64|0.10}}

| radius = {{val|0.0120|0.0006}}

| luminosity =

| gravity = {{val|8.09|0.05}}

| temperature = {{val|12381|186}}

| metal_fe =

| rotation =

| age =

}}

{{Starbox catalog

| names = PY Vul, EGGR 277, LSPM J1937+2743, USNO-B1.0 1177-00513805, WD 1935+276, USNO 352, WD 1935+27, NLTT 48026, GJ 1241, PG 1935+276.

}}

{{Starbox reference

| Simbad = PY+Vul

| ARICNS = 02231

}}

G 185-32, also known by the variable star designation PY Vulpeculae, is a white dwarf in the constellation Vulpecula. Located approximately {{convert|18.3|pc|ly}} distant, the stellar remnant is a ZZ Ceti variable, varying by 0.02 apparent magnitudes from the mean of 13.00.

Observational history

This star was first noticed during a survey for high proper motion stars by Henry L. Giclas, at Lowell Observatory, who listed it as a suspected white dwarf. The white dwarf designation was confirmed spectroscopically in 1970 by astronomer Jesse L. Greenstein of the California Institute of Technology. Observations made by John McGraw et al. during 1979 and 1980 showed that G 185-32 is a variable star. It was given its variable star designation in 1985.

References

{{Reflist|refs=

{{cite journal |last1=McGraw |first1=J. T. |last2=Fontaine |first2=G. |last3=Dearborn |first3=G. S. P. |last4=Gustafson |first4=J. |last5=Lacombe |first5=P. |author6-link=Sumner Starrfield |last6=Starrfield |first6=S. G. |title=Two new variable white dwarfs : G 185-32 and G 191-16 |journal=The Astrophysical Journal |date=November 1981 |volume=250 |pages=349–354 |doi=10.1086/159381 |bibcode=1981ApJ...250..349M |url=https://ui.adsabs.harvard.edu/abs/1981ApJ...250..349M |access-date=26 May 2022}}

{{cite journal | title=Measurements of Physical Parameters of White Dwarfs: A Test of the Mass–Radius Relation | last1=Bédard | first1=A. | last2=Bergeron | first2=P. | last3=Fontaine | first3=G. | display-authors=1 | journal=The Astrophysical Journal | volume=848 | issue=1 | at=11 | year=2017 | arxiv=1709.02324 | bibcode=2017ApJ...848...11B | bibcode-access=free | doi=10.3847/1538-4357/aa8bb6 | doi-access=free }}

{{cite journal | title=Lowell proper motions VIII : proper motion survey of the Northern Hemisphere with the 13-inch photographic telescope of the Lowell Observatory | last1=Giclas | first1=Henry L. | last2=Burnham | first2=Robert | last3=Thomas | first3=Norman Gene | display-authors=1 | journal=Lowell Observatory Bulletin | volume=6 | number=132 | pages=233–247 | year=1966 | bibcode=1966LowOB...6..233G | bibcode-access=free }}

{{Cite journal | title=A Spectroscopic Survey and Analysis of Bright, Hydrogen-Rich White Dwarfs | last1=Gianninas | first1=A.| last2=Bergeron | first2=P.| last3=Ruiz | first3=M. T. | display-authors=1 | journal=The Astrophysical Journal | volume=743 | issue=2 | at=138 | year=2011 | arxiv=1109.3171 | bibcode=2011ApJ...743..138G | bibcode-access=free | doi=10.1088/0004-637X/743/2/138 | doi-access=free }}

{{cite journal | title=Some New White Dwarfs with Peculiar Spectra. VI | last1=Greenstein | first1=Jesse L. | journal=Astrophysical Journal Letters | volume=162 | pages=L55–L59 | year=1970 | bibcode=1970ApJ...162L..55G | bibcode-access=free | doi=10.1086/180622 | doi-access=free }}

{{cite journal |doi=10.1086/498708 |last1=Skrutskie |first1=Michael F. |last2=Cutri |first2=Roc M. |last3=Stiening |first3=Rae |last4=Weinberg |first4=Martin D. |last5=Schneider |first5=Stephen E. |last6=Carpenter |first6=John M. |last7=Beichman |first7=Charles A. |last8=Capps |first8=Richard W. |last9=Chester |first9=Thomas |last10=Elias |first10=Jonathan H. |last11=Huchra |first11=John P. |last12=Liebert |first12=James W. |last13=Lonsdale |first13=Carol J. |last14=Monet |first14=David G. |last15=Price |first15=Stephan |last16=Seitzer |first16=Patrick |last17=Jarrett |first17=Thomas H. |last18=Kirkpatrick |first18=J. Davy |last19=Gizis |first19=John E. |last20=Howard |first20=Elizabeth V. |last21=Evans |first21=Tracey E. |last22=Fowler |first22=John W. |last23=Fullmer |first23=Linda |last24=Hurt |first24=Robert L. |last25=Light |first25=Robert M. |last26=Kopan |first26=Eugene L. |last27=Marsh |first27=Kenneth A. |last28=McCallon |first28=Howard L. |last29=Tam |first29=Robert |last30=Van Dyk |first30=Schuyler D. |last31=Wheelock |first31=Sherry L. |title=The Two Micron All Sky Survey (2MASS) |journal=The Astronomical Journal |date=1 February 2006 |volume=131 |issue=2 |pages=1163–1183 |bibcode=2006AJ....131.1163S |s2cid=18913331 |issn=0004-6256 |doi-access=free }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=II/246/out&2MASS===19371367%2b2743186 Vizier catalog entry ]

{{cite journal |last1=Kholopov |first1=P. N. |last2=Samus |first2=N. N. |last3=Kazarovets |first3=E. V. |last4=Perova |first4=N. B. |title=The 67th Name-List of Variable Stars |journal=Information Bulletin on Variable Stars |date=March 1985 |volume=2681 |pages=1-32 |bibcode=1985IBVS.2681....1K |url=https://articles.adsabs.harvard.edu/pdf/1985IBVS.2681....1K |access-date=17 April 2025}}

}}

Category:Vulpecula

Category:Pulsating white dwarfs

Vulpeculae, PY

1241