M31-RV

{{Short description|Possible red cataclysmic variable star in the constellation Andromeda}}

{{Starbox begin

| name = M31-RV

}}

{{Starbox image

| image = 250px

| caption = Light curves for M31-RV, adapted from Boschi and Munari (2004). The red dots show the red band magnitude, and the blue dots show the blue band magnitude.

}}

{{Starbox observe

| epoch = J2000.0

| constell = Andromeda

| ra = {{RA|00|43|02.433}}

| dec = {{DEC|+41|12|56.17}}

| appmag_v =

}}

{{Starbox character

| type = M supergiant

| class = M0I-M7I

| variable = Luminous Red Nova

}}

{{Starbox detail

| radius = 2,000 during outburst

| temperature = 4,000 during outburst

| luminosity = 900,000 during outburst{{efn|name=lum|Calculated using the Stefan-Boltzmann Law using the given values for radius and temperature in the reference}}

}}

{{Starbox catalog

| names = M31 V1006, M31 V1007, McD 88 1

}}

{{Starbox reference

| Simbad = M31+RV

}}

M31-RV is a possible red cataclysmic variable star located in the Andromeda Galaxy (M31) that experienced an outburst in 1988, which was similar to the outburst V838 Monocerotis experienced in 2002. At peak brightness, M31-RV was the most luminous red supergiant in the Local Group. Such objects have been called luminous red novae or intermediate-luminosity red transients. During the outburst, both V838 Mon and M31-RV reached a maximum absolute visual magnitude of -9.8.

In 2006, the area around M31-RV was observed using the Hubble Space Telescope, but only red giants were seen. Most likely the star either became too dim for Hubble to see, the star is a companion of one of the red giants, or the star is one of the red giants themselves.

M31-RV reached a peak visual magnitude of 17 before fading rapidly and showing dust formation. The most likely explanation states that these outbursts occur during stellar merger events.

Notes

References

{{reflist|refs=

{{cite journal

| bibcode=2004A&A...418..869B

| arxiv=astro-ph/0402313| title=M 31-RV evolution and its alleged multi-outburst pattern| journal=Astronomy and Astrophysics| volume=418| issue=3| pages=869–875| last1=Boschi| first1=F.| last2=Munari| first2=U.| year=2004| doi=10.1051/0004-6361:20035716| s2cid=18582562}}

{{Cite journal |last1=Evans |first1=A. |last2=Geballe |first2=T. R. |last3=Rushton |first3=M. T. |last4=Smalley |first4=B. |last5=van Loon |first5=J. T. |last6=Eyres |first6=S. P. S. |last7=Tyne |first7=V. H. |date=2003-08-11 |title=V838 Mon: an L supergiant? |journal=Monthly Notices of the Royal Astronomical Society |volume=343 |issue=3 |pages=1054–1056 |doi=10.1046/j.1365-8711.2003.06755.x |doi-access=free |bibcode=2003MNRAS.343.1054E |issn=0035-8711}}

{{cite journal |last1=Rich |first1=R. Michael |last2=Mould |first2=Jeremy |last3=Picard |first3=Alain |last4=Frogel |first4=Jay A. |last5=Davies |first5=Roger |title=Luminous M Giants in the Bulge of M31 |journal=Astrophysical Journal Letters |date=June 1989 |volume=341 |page=L51 |doi=10.1086/185455 |url=https://articles.adsabs.harvard.edu/pdf/1989ApJ...341L..51R |access-date=10 October 2024}}

{{cite journal

| bibcode=2011ApJ...737...17B

| arxiv=1105.4595| title=Hubble Space Telescope Imaging of the Outburst Site of M31 RV. II. No Blue Remnant in Quiescence| journal=The Astrophysical Journal| volume=737| issue=1| pages=17| last1=Bond| first1=Howard E.| year=2011| doi=10.1088/0004-637X/737/1/17| s2cid=118561097}}

{{cite journal|bibcode=2014MNRAS.443.1319K |title=Stellar mergers are common |journal=Monthly Notices of the Royal Astronomical Society |volume=443 |issue=2 |pages=1319 |last1=Kochanek |first1=C. S. |last2=Adams |first2=Scott M. |last3=Belczynski |first3=Krzysztof |year=2014 |arxiv=1405.1042 |doi=10.1093/mnras/stu1226 |doi-access=free |s2cid=118617376 }}

}}

Category:Andromeda (constellation)

Category:M-type supergiants

Category:Luminous red novae

Category:Stars in the Andromeda Galaxy

Category:Extragalactic stars

M31-RV

See also

Notes

References