VVV-WIT-01: highly obscured classical nova or protostellar collision?
VVV-WIT-01: highly obscured classical nova or protostellar collision?
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VVV-WIT-01:高度模糊的经典新星或原恒星碰撞?
DOI:
10.1093/mnras/staa155
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发表时间:
2020
影响因子:
4.8
通讯作者:
Smith, L C
中科院分区:
文献类型:
--
作者:
Lucas, P W;Minniti, D;Kamble, A;Kaplan, D L;Cross, N;Dekany, I;Ivanov, V D;Kurtev, R;Saito, R K;Smith, L C
A search of the first Data Release of the VISTA Variables in the Via Lactea (VVV) Survey discovered the exceptionally red transient VVV-WIT-01 (H−Ks= 5.2). It peaked before March 2010, then faded by ∼9.5 mag over the following 2 yr. The 1.6–22μm spectral energy distribution in March 2010 was well fit by a highly obscured blackbody withT∼ 1000 K andmag. The source is projected against the Infrared Dark Cloud (IRDC) SDC G331.062−0.294. The chance projection probability is small for any single event (p≈ 0.01–0.02), which suggests a physical association, e.g. a collision between low mass protostars. However, blackbody emission atT∼ 1000 K is common in classical novae (especially CO novae) at the infrared peak in the light curve due to condensation of dust ∼30–60 d after the explosion. Radio follow-up with the Australia Telescope Compact Array detected a fading continuum source with properties consistent with a classical nova but probably inconsistent with colliding protostars. Considering all VVV transients that could have been projected against a catalogued IRDC raises the probability of a chance association top= 0.13–0.24. After weighing several options, it appears likely that VVV-WIT-01 was a classical nova event located behind an IRDC.
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DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
R. Gehrz
通讯作者:
R. Gehrz
DOI:
10.1086/112585
发表时间:
1979
期刊:
The Astronomical Journal
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S. Aarseth
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
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