2020MNRAS.494.5576P

Query : 2020MNRAS.494.5576P

2020MNRAS.494.5576P - Mon. Not. R. Astron. Soc., 494, 5576-5589 (2020/June-1)

The mystery of photometric twins DES17X1boj and DES16E2bjy.

PURSIAINEN M., GUTIERREZ C.P., WISEMAN P., CHILDRESS M., SMITH M., FROHMAIER C., ANGUS C., CASTRO SEGURA N., KELSEY L., SULLIVAN M., GALBANY L., NUGENT P., BASSETT B.A., BROUT D., CAROLLO D., D'ANDREA C.B., DAVIS T.M., FOLEY R.J., GRAYLING M., HINTON S.R., INSERRA C., KESSLER R., LEWIS G.F., LIDMAN C., MACAULAY E., MARCH M., MOLLER A., MULLER T., SCOLNIC D., SOMMER N.E., SWANN E., THOMAS B.P., TUCKER B.E., VINCENZI M., ABBOTT T.M.C., ALLAM S., ANNIS J., AVILA S., BERTIN E., BROOKS D., BUCKLEY-GEER E., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., DA COSTA L.N., DE VICENTE J., DESAI S., DIEHL H.T., DOEL P., EIFLER T.F., EVERETT S., FLAUGHER B., FRIEMAN J., GARCIA-BELLIDO J., GAZTANAGA E., GERDES D.W., GRUEN D., GRUENDL R.A., GSCHWEND J., GUTIERREZ G., HOLLOWOOD D.L., HONSCHEID K., JAMES D.J., KIM A.G., KRAUSE E., KUEHN K., MAIA M.A.G., MARSHALL J.L., MENANTEAU F., MIQUEL R., OGANDO R.L.C., PALMESE A., PAZ-CHINCHON F., PLAZAS A.A., ROODMAN A., SANCHEZ E., SCARPINE V., SCHUBNELL M., SERRANO S., SEVILLA-NOARBE I., SUCHYTA E., SWANSON M.E.C., TARLE G. and WESTER W.

Abstract (from CDS):

We present an analysis of DES17X1boj and DES16E2bjy, two peculiar transients discovered by the Dark Energy Survey (DES). They exhibit nearly identical double-peaked light curves that reach very different maximum luminosities (Mr = -15.4 and -17.9, respectively). The light-curve evolution of these events is highly atypical and has not been reported before. The transients are found in different host environments: DES17X1boj was found near the nucleus of a spiral galaxy, while DES16E2bjy is located in the outskirts of a passive red galaxy. Early photometric data are well fitted with a blackbody and the resulting moderate photospheric expansion velocities (1800 km s–1 for DES17X1boj and 4800 km s–1 for DES16E2bjy) suggest an explosive or eruptive origin. Additionally, a feature identified as high-velocity Ca II absorption (v ≃ 9400 km s–1) in the near-peak spectrum of DES17X1boj may imply that it is a supernova. While similar light-curve evolution suggests a similar physical origin for these two transients, we are not able to identify or characterize the progenitors.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): supernovae: general

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 DES16E2bjy SN? 00 33 19.34 -44 20 19.6           ~ 1 0
2 WISEA J003319.74-442022.9 G 00 33 19.7404 -44 20 22.909           ~ 1 0
3 SN 2013ej SN* 01 36 48.16 +15 45 31.0           SNIIP 248 0
4 LEDA 1051269 G 02 19 53.79 -04 57 10.4           ~ 5 0
5 DES17X1boj SN? 02 19 53.80 -04 57 10.4           ~ 1 0
6 DES14X3taz SN* 02 28 04.46 -04 05 12.7           SLSN-I 47 0
7 SN 2005E SN* 02 39 14.34 +01 05 55.0     16.8     SNIb/c 128 1
8 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 420 0
9 DES16C2nm SN* 03 40 14.83 -29 05 53.5           SLSN-I 17 0
10 V* V838 Mon CV* 07 04 04.8221494992 -03 50 50.648894412       15.181 14.51 M10+B3V 462 1
11 PS1-12sk SN* 08 44 54.860 +42 58 16.89           SNIbn 40 0
12 SN 2015bh SN* 09 09 34.96 +33 07 20.4           SNIIn 83 1
13 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1507 1
14 SN 2016bkv SN* 10 18 19.31 +41 25 39.3           SNII 66 0
15 SN 2009N SN* 12 31 09.46 -08 02 56.3           SNIIP 111 1
16 NAME M51 OT2019-1 ev 13 29 42.394 +47 11 16.99           ~ 30 0
17 SN 2011dh SN* 13 30 05.10555 +47 10 10.9227           SNIIb 445 1
18 SN 2011fe SN* 14 03 05.711 +54 16 25.22   10.12 10.06     SNIa-norm 747 1
19 AT 2014ib SN? 14 59 59.47 +01 54 26.6           ~ 43 1
20 SN 2010as SN* 15 49 49.23 -29 23 09.7           SNIb/c 36 1
21 SN 2006oz SN* 22 08 53.56 +00 53 50.4           SLSN-I 90 1
22 SN 1999ex SN* 22 16 07.27 -36 50 53.7   17.35       SNIb 149 2
23 SN 2009ip s*b 22 23 08.26 -28 56 52.4           LBV 406 0
24 SN 2014ft SN* 23 33 27.95 +33 38 46.1           SNIc 58 0

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