2017ApJ...836...60L


Query : 2017ApJ...836...60L

2017ApJ...836...60L - Astrophys. J., 836, 60-60 (2017/February-2)

Two new calcium-rich gap transients in group and cluster environments.

LUNNAN R., KASLIWAL M.M., CAO Y., HANGARD L., YARON O., PARRENT J.T., McCULLY C., GAL-YAM A., MULCHAEY J.S., BEN-AMI S., FILIPPENKO A.V., FREMLING C., FRUCHTER A.S., HOWELL D.A., KODA J., KUPFER T., KULKARNI S.R., LAHER R., MASCI F., NUGENT P.E., OFEK E.O., YAGI M. and YAN L.

Abstract (from CDS):

We present the Palomar Transient Factory discoveries and the photometric and spectroscopic observations of PTF11kmb and PTF12bho. We show that both transients have properties consistent with the class of calcium-rich gap transients, specifically lower peak luminosities and rapid evolution compared to ordinary supernovae, and a nebular spectrum dominated by [Ca II] emission. A striking feature of both transients is their host environments: PTF12bho is an intracluster transient in the Coma Cluster, while PTF11kmb is located in a loose galaxy group, at a physical offset ∼150 kpc from the most likely host galaxy. Deep Subaru imaging of PTF12bho rules out an underlying host system to a limit of MR -8.0 mag, while Hubble Space Telescope imaging of PTF11kmb reveals a marginal counterpart that, if real, could be either a background galaxy or a globular cluster. We show that the offset distribution of Ca-rich gap transients is significantly more extreme than that seen for SNe Ia or even short-hard gamma-ray bursts (sGRBs). Thus, if the offsets are caused by a kick, they require higher kick velocities and/or longer merger times than sGRBs. We also show that almost all Ca-rich transients found to date are in group and cluster environments with elliptical host galaxies, indicating a very old progenitor population; the remote locations could partially be explained by these environments having the largest fraction of stars in the intragroup/intracluster light following galaxy-galaxy interactions.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): supernovae: general - supernovae: individual: (PTF11kmb, PTF12bho, PTF10hcw, SN 2005E) - supernovae: individual: (PTF11kmb, PTF12bho, PTF10hcw, SN 2005E)

VizieR on-line data: <Available at CDS (J/ApJ/836/60): table1.dat>

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 SN 2005E SN* 02 39 14.34 +01 05 55.0     16.8     SNIb/c 122 1
2 NGC 1032 AG? 02 39 23.6373 +01 05 37.652   13.2       ~ 95 1
3 SN 2007ke SN* 02 54 23.90 +41 34 16.3     18.5     SNIb 36 1
4 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1637 0
5 SN 2010X SN* 04 48 27.90 +73 28 14.8           SNIc 75 1
6 SN 2003H SN* 06 16 25.68 -21 22 23.8     17.8     SNIbpec 46 1
7 SN 2012hn SN* 06 42 42.55 -27 26 49.8           SNIcPec 37 1
8 PTF 10hcw SN* 08 43 36.22 +50 12 38.5           SNIb 7 0
9 NGC 2639 Sy2 08 43 38.0682469032 +50 12 19.942091604 12.90 12.56 11.65     ~ 423 2
10 SN 2000ds SN* 09 11 36.24 +60 01 42.2     17.9     SNIb 47 1
11 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 501 2
12 SN 2003dg SN* 11 57 31.97 -01 15 13.6     19.3     SNIb/cpec 31 1
13 NGC 4589 LIN 12 37 24.9875 +74 11 30.903   12.0       ~ 285 1
14 SN 2005cz SN* 12 37 27.85 +74 11 24.5     16.0     SNIb 54 1
15 PTF 11bij SN* 12 58 58.39 +37 23 12.0       19.9   ~ 18 0
16 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4763 2
17 LEDA 44863 GiC 13 01 09.4378518336 +28 01 59.206395108 17.54 17.29 16.34 15.81 15.44 ~ 32 0
18 PTF 12bho SN* 13 01 16.645 +28 01 18.50           ~ 15 0
19 SN 2001co SN* 14 19 11.80 +24 47 42.9     18.5     SNIb/cpec 36 1
20 SN 2003dr SN* 14 38 11.13 +46 38 03.4     18.0     SNIb/cpec 35 1
21 PTF 10iuv SN* 17 16 54.27 +31 33 51.7       21.2   ~ 27 0
22 GALEXASC J222226.82+362011.9 UV 22 22 26.82 +36 20 11.9           ~ 1 0
23 NGC 7265 GiG 22 22 27.4862353560 +36 12 35.306166096   13.7       ~ 48 0
24 2MASX J22223308+3616504 G 22 22 33.0566575872 +36 16 50.041203240           ~ 2 0
25 Anon J222237+3620 G 22 22 37.03 +36 20 43.6           ~ 1 0
26 Anon J222242+3619 G 22 22 42.66 +36 19 25.3           ~ 1 0
27 GALEXASC J222249.41+361811.7 AG? 22 22 49.41 +36 18 11.7           ~ 2 0
28 Anon J222252+3617 G 22 22 52.30 +36 17 39.9           ~ 1 0
29 PTF 11kmb SN* 22 22 53.61 +36 17 36.5           SNIb 18 0
30 Anon J222305+3619 G 22 23 05.50 +36 19 00.5           ~ 1 0
31 PTF 09dav SN* 22 46 55.15 +21 37 34.1           ~ 38 0
32 SN 2008ha SN* 23 34 52.69 +18 13 35.4           SNIax 182 1

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