2009A&A...504..945T


Query : 2009A&A...504..945T

2009A&A...504..945T - Astronomy and Astrophysics, volume 504, 945-958 (2009/9-4)

Possible evidence of asymmetry in SN 2007rt, a type IIn supernova.

TRUNDLE C., PASTORELLO A., BENETTI S., KOTAK R., VALENTI S., AGNOLETTO I., BUFANO F., DOLCI M., ELIAS-ROSA N., GREINER T., HUNTER D., KEENAN F.P., LORENZI V., MAGUIRE K. and TAUBENBERGER S.

Abstract (from CDS):

An optical photometric and spectroscopic analysis of the slowly-evolving type IIn SN 2007rt is presented, covering a duration of 481 days after discovery. Its earliest spectrum, taken approximately 100 days after the explosion epoch, indicates the presence of a dense circumstellar medium, with which the supernova ejecta is interacting. This is supported by the slowly-evolving light curve. A notable feature in the spectrum of SN 2007rt is the presence of a broad HeI 5875 line, not usually detected in type IIn supernovae. This may imply that the progenitor star has a high He/H ratio, having shed a significant portion of its hydrogen shell via mass-loss. An intermediate resolution spectrum reveals a narrow Hα P-Cygni profile, the absorption component of which has a width of 128km/s. This slow velocity suggests that the progenitor of SN 2007rt recently underwent mass-loss with wind speeds comparable to the lower limits of those detected in luminous blue variables. Asymmetries in the line profiles of H and He at early phases bears some resemblance to double-peaked features observed in a number of Ib/c spectra. These asymmetries may be indicative of an asymmetric or bipolar outflow or alternatively dust formation in the fast expanding ejecta. In addition, the late time spectrum, at over 240 days post-explosion, shows clear evidence for the presence of newly formed dust.

Abstract Copyright:

Journal keyword(s): supernovae: individual: SN 2007rt - stars: circumstellar matter - stars: evolution - stars: winds, outflows - stars: supernovae: general

Simbad objects: 38

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Number of rows : 38
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SN 2002ic SN* 01 30 02.55 +21 53 06.9     18.5     SNIapec 228 1
2 SN 2005gj SN* 03 01 11.96 -00 33 13.9   18.6       SNIapec 189 1
3 SN 2006gy SN* 03 17 27.06 +41 24 19.5       14.20   SNIIn 322 1
4 SN 1995G SN* 04 43 44.2 -05 18 53     15.5     SNIIn 72 1
5 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4762 2
6 V* VY CMa s*r 07 22 58.32877 -25 46 03.2355 12.01 10.19 7.95     M5Iae 1066 0
7 SN 1994aj SN* 09 06 11.25 -10 40 00.1     18.0     SNII 34 1
8 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 313 1
9 SN 2005ip SN* 09 32 06.42 +08 26 44.4 18.1 18.7 18.5     SNII 166 1
10 SN 1997ab SN* 09 51 00.212 +20 04 19.88   14.7       SNIIn 55 1
11 SN 2006T SN* 09 54 30.21 -25 42 29.3     17.2     SNIIb 54 1
12 SN 1988Z SN* 10 51 50.10 +16 00 00.5   16.8       SNIIn 358 1
13 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 615 0
14 USNO-B1.0 1405-00218658 * 11 02 16.7997205608 +50 33 33.922057896   13.792 13.064     ~ 1 0
15 USNO-B1.0 1406-00218794 * 11 02 23.5965382968 +50 38 01.842727164 17.623 17.875 17.360 17.028 16.659 ~ 1 0
16 USNO-B1.0 1405-00218672 * 11 02 25.6842020208 +50 33 15.309099324 17.541 21.797 20.321 19.288 17.896 ~ 1 0
17 USNO-B1.0 1405-00218684 * 11 02 29.2810259568 +50 35 19.812646644   13.639 13.140     ~ 1 0
18 USNO-B1.0 1405-00218689 * 11 02 31.4102628744 +50 32 18.702404988 20.986 20.048 18.607 17.781 16.951 ~ 1 0
19 USNO-B1.0 1406-00218810 * 11 02 32.6980220040 +50 37 55.463009124 21.031 19.922 18.775 18.055 17.428 ~ 1 0
20 USNO-B1.0 1405-00218703 * 11 02 33.7131691104 +50 33 47.867349924 20.730 20.083 19.177 18.673 18.200 ~ 1 0
21 USNO-B1.0 1405-00218704 * 11 02 33.7575855936 +50 35 51.138813840 18.037 18.225 17.669 17.294 16.905 ~ 1 0
22 SN 2007rt SN* 11 02 34.29 +50 34 58.5     16.8     SNIIn 28 1
23 UGC 6109 G 11 02 34.9188084408 +50 34 56.127910728   15.3       ~ 26 0
24 USNO-B1.0 1406-00218816 * 11 02 35.5040851536 +50 37 42.805926480 17.756 18.012 17.549 17.247 16.974 ~ 1 0
25 USNO-B1.0 1405-00218742 * 11 02 37.9652612736 +50 35 53.920534920 19.052 18.022 16.462 15.330 13.796 ~ 1 0
26 USNO-B1.0 1406-00218820 * 11 02 38.1512510448 +50 36 05.968348344 20.243 19.269 17.785 16.652 15.215 ~ 1 0
27 USNO-B1.0 1405-00218747 * 11 02 41.3021990448 +50 32 52.408723992 17.956 17.534 16.682 16.217 15.778 ~ 1 0
28 SN 1996L SN* 11 38 37.80 -43 25 13.8   18.5       SNIIn 41 1
29 SN 1998S SN* 11 46 06.1 +47 28 55     12.2     SNIIn 429 1
30 SN 1994W SN* 12 02 10.92 +62 08 32.7     13.3     SNIInP 176 1
31 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 748 1
32 SN 2005la SN* 12 52 15.68 +27 31 52.5     17.6     SNIbn/IIbn 60 1
33 SN 1997eg SN* 13 11 36.73 +22 55 29.4     15.6     SNIIn 69 1
34 HD 160529 sg* 17 41 59.0261939376 -33 30 13.704456780 8.17 7.87 6.66 5.50 4.51 A2Ia 192 1
35 SN 1999cq SN* 18 32 07.10 +37 36 44.3     15.8     SNIb/c 52 1
36 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1756 2
37 SN 1999el SN* 20 37 18.03 +66 06 11.9     14.9     SNIIn 66 1
38 SN 2003jd SN* 23 21 03.38 -04 53 45.5   16.34       SNIc-BL 137 1

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2022.11.30-04:41:19

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