Nova Herculis 2021

{{Short description|Nova in the constellation Hercules seen in 2021}}

{{Starbox image

| image = 250px

| caption = A visual band light curve for Nova Herculis 2021, plotted from AAVSO data. The green point in the lower left corner shows the pre-discovery ASAS-SN data point. The inset plot shows the time of peak brightness.

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{{Starbox observe

|constell=Hecules

|epoch = J2000.0

|ra={{RA|18|57|30.98}}

|dec={{DEC|+16|53|39.6}}

|appmag_v = 6.0 - <20.5 (g band)

}}

{{Starbox astrometry

| dist_pc = ~4,750

}}{{Starbox character

| variable = Nova

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{{Starbox catalogue

|names=V1674 Her, TCP J18573095+1653396, ZTF19aasfsjq

}}

{{Starbox reference

|Simbad=NOVA+HER+2021

}}

Nova Herculis 2021, also known V1674 Herculis, was a nova in the constellation Hercules. It reached a peak brightness of magnitude 6.0, making it visible to the naked eye under ideal observing conditions. It was discovered on June 12, 2021, by Seiji Ueda of Kushiro Japan, just hours before it obtained peak brightness. The discovery images were taken with a Canon EOS 6D digital camera with a 200 mm lens, when the nova was at magnitude 8.4. Subsequent analysis of ASAS-SN data showed the star had a magnitude of 16.62 (g band) 8.4 hours before it was discovered. Of the galactic novae for which detailed light curves are available, Nova Herculis 2021 had the fastest decline from peak brightness ever seen. This nova has been detected throughout the electromagnetic spectrum, from radio to gamma rays.

All novae are binary stars, consisting of a white dwarf orbited by a mass-losing "donor star". Photometric observations taken during June, July and August 2021 found that binary pair's orbital period is 3.670416 ± 0.0008 hours. The Zwicky Transient Facility had been observing the region of the sky containing Nova Herculis 2021 since March 2018, and analysis of that data yielded a spin period of 8.357 minutes for the white dwarf.

References

{{reflist |refs=

{{cite web |title=Download Data |url=https://www.aavso.org/data-download |website=aavso.org |publisher=AAVSO |access-date=1 October 2021}}

{{cite journal |last1=Schmidt |first1=R. E. |last2=Shugarov |first2=S. Y. |last3=Afonina |first3=M. D. |title=The Photometric Period of V1674 Herculis (Nova Her 2021) |journal=The Journal of the American Association of Variable Star Observers |date=December 2021 |volume=49 |issue=2 |page=257 |bibcode=2021JAVSO..49..257S }}

{{cite web |title=CBAT "Transient Object Followup Reports" |url=http://www.cbat.eps.harvard.edu/unconf/followups/J18573095+1653396.html |website=Central Bureau for Astronomical Telegrams |publisher=Harvard University |access-date=6 June 2022}}

{{cite journal |last1=Woodward |first1=C. E. |last2=Banerjee |first2=D. P. K. |last3=Geballe |first3=T. R. |last4=Page |first4=K. L. |last5=Starrfield |first5=S. |author5-link=Sumner Starrfield |last6=Wagner |first6=R. M. |title=Near-infrared Studies of Nova V1674 Herculis: A Shocking Record Breaker |journal=The Astrophysical Journal Letters |date=November 2021 |volume=922 |issue=1 |page=L10 |doi=10.3847/2041-8213/ac3518 |arxiv=2110.13053 |bibcode=2021ApJ...922L..10W |s2cid=239769198 |doi-access=free }}

{{cite journal |last1=Mroz |first1=P. |last2=Burdge |first2=K. |last3=van Roestel |first3=J. |last4=Prince |first4=T. |last5=Kong |first5=A. K. H. |last6=Li |first6=K. L. |title=An 8.4 min period in the archival ZTF light curve of Nova Herculis 2021 |journal=The Astronomer's Telegram |date=June 2021 |volume=14720 |page=1 |bibcode=2021ATel14720....1M }}

{{cite journal |last1=Aydi |first1=E. |last2=Sokolovsky |first2=K. V. |last3=Chomiuk |first3=L. |last4=Strader |first4=J. |last5=Kawash |first5=A. |last6=Page |first6=K. L. |last7=Boussin |first7=C. |last8=Ikonnikova |first8=N. |last9=Atapin |first9=K. E. |last10=Belinski |first10=A. A. |last11=Burlak |first11=M. A. |last12=Dodin |first12=A. V. |last13=Maslennikova |first13=N. A. |last14=Postnov |first14=K. A. |last15=Potanin |first15=S. A. |last16=Safonov |first16=B. S. |last17=Shatsky |first17=N. I. |last18=Tatarnikov |first18=A. M. |last19=Korotkiy |first19=S. |last20=Stanek |first20=K. Z. |last21=Kochanek |first21=C. S. |last22=Shappee |first22=B. J. |title=Multi-wavelength follow up of the very fast Nova Herculis 2021 (TCP J18573095+1653396) |journal=The Astronomer's Telegram |date=June 2021 |volume=14710 |page=1 |bibcode=2021ATel14710....1A }}

{{cite journal |last1=Drake |first1=Jeremy J. |last2=Ness |first2=Jan-Uwe |last3=Page |first3=Kim L. |last4=Luna |first4=G. J. M. |last5=Beardmore |first5=Andrew P. |last6=Orio |first6=Marina |last7=Osborne |first7=Julian P. |last8=Mróz |first8=Przemek |last9=Starrfield |first9=Sumner |last10=Banerjee |first10=Dipankar P. K. |last11=Balman |first11=Solen |last12=Darnley |first12=M. J. |last13=Bhargava |first13=Y. |last14=Dewangan |first14=G. C. |last15=Singh |first15=K. P. |title=The Remarkable Spin-down and Ultrafast Outflows of the Highly Pulsed Supersoft Source of Nova Herculis 2021 |journal=The Astrophysical Journal Letters |date=December 2021 |volume=922 |issue=2 |page=L42 |doi=10.3847/2041-8213/ac34fd |arxiv=2110.14058 |bibcode=2021ApJ...922L..42D |s2cid=239998563 |doi-access=free }}

{{cite web |title=V1674 Her |url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=2222777 |website=The International Variable Star Index |publisher=AAVSO |access-date=12 June 2022}}

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External links

{{Cite web |title=A new nova disappeared faster than ever, and an even bigger cosmic catastrophe is coming |url=https://bigthink.com/starts-with-a-bang/nova-disappear/ |access-date= |website=Starts With a Bang |date=15 June 2022 |language=en-US}}

Category:Novae

Category:Hercules (constellation)

Category:2021 in science

Herculis, V1674

20210612