2018ApJ...855...66C

Query : 2018ApJ...855...66C

2018ApJ...855...66C - Astrophys. J., 855, 66-66 (2018/March-1)

Color variabilities of spectrally defined red QSOs at z = 0.3-1.2.

CHEN I.-C., HWANG C.-Y., KAISER N., MAGNIER E.A., METCALFE N. and WATERS C.

Abstract (from CDS):

We study the brightness and the color variabilities of 34 red and 122 typical quasi-stellar objects (QSOs) at z = 0.3-1.2 using data from the Pan-STARRS Medium Deep Survey. The red and the typical QSOs are selected based on the ratios of the flux densities at 3000 Å to those at 4000 Å in the rest frame. We find that 16 out of 34 red QSOs are identified as extended sources, which exhibit strong brightness and color variabilities at shorter wavelengths due to the contamination of the emission from their host galaxies. Some point-like QSOs with significant color variabilities are able to change their color classification according to our spectral definition. The timescales of the color variabilities for these point-like QSOs are within 4 years, suggesting that the size scales of the mechanisms producing the color variabilities are less than a few light years. The spectra of some extended and point-like red QSOs can be well fitted with the dust-reddened spectra of a typical QSO, while others are difficult to explain with dust reddening.

Journal keyword(s): galaxies: active - galaxies: nuclei - quasars: general

Simbad objects: 157

Full paper

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Number of rows : 157

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	PB 5669	QSO	00 00 11.9619107208	+00 02 25.330556868		18.19	18.06			~	49	0
2	[VV2006] J083732.2+450139	QSO	08 37 32.2010282064	+45 01 39.756377568		20.34	19.81			~	25	0
3	US 1412	QSO	08 39 24.9637345320	+44 21 05.993363088		19.03	18.68			~	28	0
4	US 1429	QSO	08 39 50.1998510712	+43 29 41.438620032		19.73	19.51			~	27	0
5	US 1466	QSO	08 41 01.6999228248	+42 58 06.398275116		18.69	18.46			~	32	0
6	[VV2006] J084140.6+434908	QSO	08 41 40.6320387768	+43 49 08.557038624		18.62	18.27			~	25	0
7	[VV2006] J084146.0+450443	QSO	08 41 46.0151355768	+45 04 43.360708620		19.4	19.66	19.4		~	24	0
8	US 1488	QSO	08 41 53.0227591680	+44 31 56.959139820		19.48	19.29			~	23	0
9	SDSS J084221.84+453516.1	QSO	08 42 21.8427421560	+45 35 16.193127804		20.78	20.66			~	20	0
10	[VV2006] J084513.0+445208	QSO	08 45 12.9891150648	+44 52 08.970115620		19.3	19.88	18.9		~	23	0
11	SDSS J095530.55+021652.9	Sy1	09 55 30.5565157800	+02 16 52.836501972		20.73	20.52			~	19	0
12	[VV2006] J095642.3+020553	QSO	09 56 42.3371480376	+02 05 54.426191028		18.7	19.53	19.0		~	24	0
13	[VV2006] J095656.2+021315	QSO	09 56 56.1961725384	+02 13 15.096657000		19.6	20.04	19.1		~	22	0
14	[VV2006] J095705.1+014949	QSO	09 57 05.1425625576	+01 49 49.504013256		20.64	20.45			~	23	0
15	3XMM J095819.8+022903	Sy1	09 58 19.8739847256	+02 29 03.555116304	19.38	19.24	19.38	18.3	19.09	~	60	0
16	2MASS J09582371+0112364	Sy1	09 58 23.7381822768	+01 12 35.700474492		20.01	19.64			~	22	0
17	SDSS J095915.20+031617.4	QSO	09 59 15.2093406792	+03 16 17.487353460		20.10	19.69			~	18	0
18	[VV2006] J095945.5+013032	QSO	09 59 45.6064751880	+01 30 32.223759768		20.73	20.41			~	31	0
19	[VV2006] J095946.0+024743	QSO	09 59 46.0163609928	+02 47 43.605297456	19.05	18.87	18.78	18.4	18.933	~	62	0
20	[VV2006] J100025.2+015851	QSO	10 00 25.2472241232	+01 58 52.087650276		18.71	18.62		18.81	~	82	0
21	2MASS J10002743+0259510	Sy1	10 00 27.4360642080	+02 59 51.237494520		18.98	18.50			~	25	0
22	SDSS J100043.13+020637.2	Sy1	10 00 43.1299846800	+02 06 37.403465580	20.25	19.86	19.37		18.79	~	125	0
23	[VV2006] J100104.8+011421	QSO	10 01 04.8677536944	+01 14 21.285695832		20.49	20.13			~	25	0
24	[VV2006] J100106.4+030310	QSO	10 01 06.3807314400	+03 03 09.873307152		19.23	19.16			~	23	0
25	[VV2006] J100119.6+010501	QSO	10 01 19.6965855264	+01 05 01.796794368		19.31	19.03			~	27	0
26	2QZ J100125.4+005204	Sy1	10 01 25.4714963040	+00 52 05.500056828		18.98	18.92			~	29	0
27	[VV2006] J100210.7+023025	QSO	10 02 10.7189206536	+02 30 26.192705292		19.887	19.673	19.0	19.393	~	63	0
28	[VV2006] J100227.0+033040	QSO	10 02 26.9781162672	+03 30 39.750649704		19.71	19.45			~	23	0
29	[VV2006] J100229.0+010858	QSO	10 02 29.0110449072	+01 08 58.463828484		18.5	19.26	18.4		~	21	0
30	SDSS J100232.13+023537.3	Sy1	10 02 32.1272909256	+02 35 37.374860544	19.52	19.1269	18.8555	19.2	18.853	~	78	0
31	[VV2006] J100324.5+021831	QSO	10 03 24.5653078632	+02 18 31.337332020		18.73	18.58			~	48	0
32	[VV2006] J100327.6+015742	QSO	10 03 27.6824679552	+01 57 42.467699628		18.3	18.69	18.3		~	45	0
33	[VV2006] J100334.0+024125	QSO	10 03 33.9828794496	+02 41 26.261965104		19.88	19.57			~	22	0
34	[VV2006] J100420.9+013647	QSO	10 04 21.0164729808	+01 36 47.393649792		18.4	18.87	18.7		~	26	0
35	[VV2006] J100429.0+025208	QSO	10 04 28.9988323488	+02 52 09.253052256		19.00	18.78			~	24	0
36	[VV2006] J104239.7+583230	QSO	10 42 39.6664206744	+58 32 30.959625876		19.58	19.28			~	37	0
37	SDSS J104405.37+570024.2	QSO	10 44 05.3699699832	+57 00 24.149911932		19.51	19.38			~	24	0
38	[VV2006] J104556.8+570746	Sy1	10 45 56.8329751872	+57 07 47.090271108		19.29	19.18			~	26	0
39	[VV2006] J104625.0+584839	QSO	10 46 25.0187119920	+58 48 39.194935992		19.09	18.96			~	32	0
40	[VV2006] J104633.7+571530	QSO	10 46 33.7007088960	+57 15 30.407378436		18.97	18.87			~	29	0
41	[VV2006] J104659.4+573055	QSO	10 46 59.3807477136	+57 30 55.849284720		19.58	19.21	18.89	18.90	~	35	0
42	[VV2006] J104757.5+573451	QSO	10 47 57.5223965400	+57 34 51.828677796		19.42	19.12	18.86	18.94	~	31	0
43	[VV2006] J104859.7+565648	QSO	10 48 59.6828905680	+56 56 48.664925952		18.81	18.62			~	34	0
44	[VV2006] J105000.2+581904	QSO	10 50 00.2105590272	+58 19 04.286546328		17.94	17.77			~	36	0
45	6C 104833+592905	QSO	10 51 41.1688287336	+59 13 05.273917896		19.23	19.01	19.00	18.72	~	38	2
46	[VV98] J105239.6+572432	QSO	10 52 39.5958253296	+57 24 31.425574788		18.39	18.07			~	76	0
47	[VV2006] J121440.1+473226	QSO	12 14 40.0998116976	+47 32 26.196559404		19.23	18.99			~	24	0
48	[VV2006] J121729.4+471425	QSO	12 17 29.4173246016	+47 14 24.849561984		19.90	19.47			~	26	0
49	[VV2006] J121934.4+465155	QSO	12 19 34.4169882120	+46 51 55.558932156		18.3	19.32	18.4		~	24	0
50	[VV2006] J121946.4+473748	QSO	12 19 46.4042419320	+47 37 48.196368984		20.00	19.84			~	20	0
51	[VV2006] J122025.3+480531	QSO	12 20 25.3163536560	+48 05 31.426107468		19.38	19.21			~	21	0
52	[VV2006] J122046.6+464347	QSO	12 20 46.6191133320	+46 43 47.565227532		17.1	18.06	17.7		~	28	0
53	[VV2006] J122107.5+462736	QSO	12 21 07.5484373064	+46 27 35.999647740		18.34	18.23			~	32	0
54	[VV2006] J122302.2+482036	QSO	12 23 02.2242979392	+48 20 35.943909864		19.39	19.20			~	21	0
55	[VV2006] J122419.7+481103	QSO	12 24 19.7671209528	+48 11 04.295612184		17.1	18.05	17.6		~	24	0
56	[VV2006] J122517.8+461127	QSO	12 25 17.8560086064	+46 11 26.865758544		18.76	18.61			~	27	0
57	6C 122343+475341	QSO	12 26 07.9332257184	+47 37 00.579688140		18.5	19.11	18.6		~	32	1
58	[VV2006] J141154.1+520023	QSO	14 11 54.1377242736	+52 00 23.395266324		19.42	19.16			~	42	0
59	[VV2006] J141226.5+525347	QSO	14 12 26.4891050256	+52 53 47.598937548		19.13	18.90			~	32	0
60	SDSS J141318.96+543202.4	QSO	14 13 18.9579698832	+54 32 02.356517688		19.44	19.20			~	50	0
61	[VV2006] J141353.0+523444	QSO	14 13 52.9859903760	+52 34 44.310884304		19.88	19.66			~	40	0
62	[VV2006] J141500.4+520658	QSO	14 15 00.3782504760	+52 06 58.492261548		18.73	18.65	18.72	18.64	~	51	1
63	[VV2006] J141533.9+520557	QSO	14 15 33.8900837712	+52 05 57.928040052		19.14	18.87	18.58	18.65	~	51	0
64	[VV2006] J141659.8+535807	QSO	14 16 59.7650814912	+53 58 06.703437000		18.65	18.43			~	53	0
65	[VV2006] J141856.2+535845	QSO	14 18 56.1948165888	+53 58 44.981755896		18.90	18.66			~	44	0
66	[VV2006] J142008.3+521647	QSO	14 20 08.2724073696	+52 16 46.926094620		18.70	18.40			~	36	0
67	[VV2006] J142052.4+525621	QSO	14 20 52.4389889472	+52 56 22.388952768		18.43	18.30	17.96	17.90	~	61	0
68	[VV2006] J160523.1+545612	Sy1	16 05 23.1095053176	+54 56 13.448722884	18.04	19.18	19.05			~	33	0
69	[VV2006] J160630.6+542007	QSO	16 06 30.6110388336	+54 20 07.375012548	18.25	18.2	18.96	18.0		~	37	0
70	2MASS J22111101-0009535	QSO	22 11 10.9901996712	-00 09 53.442213588		19.55	19.18		18.091	~	29	0
71	SDSS J221115.06-000030.9	QSO	22 11 15.0689079432	-00 00 30.943925064		19.73	19.62			~	21	0
72	2MASS J22115571-0010440	QSO	22 11 55.7345234208	-00 10 43.983353136		18.58	18.25			~	23	0
73	SDSS J221203.19+000239.0	QSO	22 12 03.197	+00 02 39.02		20.52	20.17			~	21	0
74	SDSS J221301.63+004342.7	QSO	22 13 01.636	+00 43 42.68		19.88	19.46			~	20	0
75	SDSS J221317.02+003714.1	QSO	22 13 17.0222475936	+00 37 14.146760928		20.29	20.01			~	15	0
76	SDSS J221337.66-002017.5	QSO	22 13 37.6679127600	-00 20 17.477942892		20.70	19.99			~	26	0
77	[VV2006] J221338.0-004305	QSO	22 13 37.9812631296	-00 43 05.941416180		18.39	17.89			~	32	0
78	SDSS J221348.77-005007.8	QSO	22 13 48.781	-00 50 07.84		20.55	20.20			~	21	0
79	NVSS J221356-002457	QSO	22 13 56.0152367688	-00 24 55.717972920		21.58	20.91		19.6186	~	25	1
80	SDSS J221407.38+000727.1	QSO	22 14 07.3881388176	+00 07 27.118791372						~	13	0
81	2MASS J22141244-0010098	QSO	22 14 12.4579481112	-00 10 09.778281780		20.55	19.97			~	18	0
82	SDSS J221424.68-005221.7	QSO	22 14 24.6881904624	-00 52 21.675222012		21.06	20.79			~	17	0
83	SDSS J221447.74-002032.6	QSO	22 14 47.7500049936	-00 20 32.655919596		19.63	19.09			~	27	0
84	SDSS J221449.38+011525.3	QSO	22 14 49.3891030368	+01 15 25.387797816		20.18	19.64			~	13	0
85	SDSS J221512.15-005152.5	QSO	22 15 12.157	-00 51 52.50		21.24	20.75			~	18	0
86	SDSS J221619.25-002430.4	QSO	22 16 19.2505100568	-00 24 30.469305888		20.21	20.01			~	22	0
87	SDSS J221707.16-004721.9	QSO	22 17 07.1636767968	-00 47 21.937073460		21.02	20.68			~	14	0
88	CXOMP J221708.7+002717	QSO	22 17 08.8398546936	+00 27 17.150995656		19.0	19.33	18.8		~	27	0
89	SDSS J221712.61-002502.8	QSO	22 17 12.6032877024	-00 25 02.818810848		20.60	20.32			~	22	0
90	SDSS J221715.18+002615.0	QSO	22 17 15.180	+00 26 15.11	20.3679	20.4392	20.1450	20.1073	19.4169	~	27	0
91	SDSS J221715.71+005630.2	QSO	22 17 15.7141952256	+00 56 30.280193484		20.31	19.69			~	24	0
92	[VV2006] J221750.5-002425	QSO	22 17 50.5023334632	-00 24 25.959760020	19.7130	19.57	19.24		18.6406	~	28	0
93	[VV2006] J221756.9+010119	QSO	22 17 56.9278025328	+01 01 19.508835828	18.3873	18.41	18.17		18.1594	~	34	0
94	SDSS J221826.14+000012.8	QSO	22 18 26.1460200408	+00 00 12.862505412		20.34	20.12			~	23	0
95	SDSS J221901.87+000025.9	QSO	22 19 01.8819119328	+00 00 25.987672908		20.16	19.85			~	18	0
96	SDSS J221907.95+004023.3	QSO	22 19 07.9545753048	+00 40 23.392168860	21.2244	20.6711	20.3368	19.9451	19.7117	~	21	0
97	SDSS J221912.12+003612.9	QSO	22 19 12.1304079192	+00 36 12.980923092		19.07	18.83			~	25	0
98	2SLAQ J221917.01-000757.5	Sy1	22 19 17.0123242296	-00 07 57.634561848		20.80	20.34			~	26	0
99	2MASS J22193220-0045517	Sy1	22 19 32.1806326944	-00 45 52.045201296		20.71	19.94			~	24	0
100	SDSS J221956.75+005913.3	QSO	22 19 56.758	+00 59 13.35		21.03	20.55			~	16	0
101	SDSS J222000.58+010742.1	QSO	22 20 00.5864212992	+01 07 42.159626724		20.85	20.42			~	15	0
102	SDSS J222029.54+004401.3	QSO	22 20 29.5463468448	+00 44 01.400570268		19.29	19.09			~	27	0
103	SDSS J222036.80-002051.9	QSO	22 20 36.8045260584	-00 20 52.032434352		20.58	20.21			~	19	0
104	SDSS J222123.28-001824.1	QSO	22 21 23.2857544848	-00 18 24.219562284		19.08	18.72			~	27	0
105	SDSS J222133.75+010119.2	Sy1	22 21 33.7599871704	+01 01 19.191033408	20.5482	20.60	20.24		19.0979	~	19	0
106	SDSS J222147.92-002205.8	QSO	22 21 47.9281498224	-00 22 05.832904476		19.3	19.61	19.0		~	20	0
107	SDSS J232355.04-001507.4	QSO	23 23 55.0412205984	-00 15 07.371666648		18.0	19.36	18.5		~	32	0
108	SDSS J232423.68-002320.6	QSO	23 24 23.6857431941	-00 23 20.693118970		21.08	20.76			~	18	0
109	SDSS J232428.36-005244.3	QSO	23 24 28.3661107248	-00 52 44.301579204		18.9	19.83	19.3		~	26	0
110	2MASS J23245867-0003028	QSO	23 24 58.6594749048	-00 03 02.997104256		20.41	19.85			~	26	0
111	SDSS J232500.55-011445.0	QSO	23 25 00.5537651064	-01 14 45.054985056		19.0	19.83	18.9		~	21	0
112	[VV2006] J232515.9+002229	QSO	23 25 15.9325144632	+00 22 29.216391312		19.04	18.74			~	31	0
113	PHL 507	QSO	23 25 25.3283710344	+00 03 52.183149480		18.77	18.54			~	32	0
114	2SLAQ J232525.52+001136.8	Sy1	23 25 25.5293101200	+00 11 36.933396684		19.73	19.51			~	35	0
115	SDSS J232545.18-004309.1	QSO	23 25 45.1917473808	-00 43 09.046093620		18.7	20.06	19.1		~	17	0
116	SDSS J232554.37-001823.8	QSO	23 25 54.3761605704	-00 18 23.757920856		20.66	20.29			~	18	0
117	[VV2006] J232555.4+004109	QSO	23 25 55.3352618616	+00 41 09.983689260		18.9	19.39	19.1		~	27	0
118	SDSS J232626.14+000922.2	QSO	23 26 26.1572450472	+00 09 22.300939296		20.34	20.09	19.94	20.03	~	24	0
119	SDSS J232705.65-000648.5	QSO	23 27 05.6565420936	-00 06 48.546326700		20.61	20.30			~	19	0
120	2MASS J23271079+0017039	Sy1	23 27 10.7894779944	+00 17 03.747311016		19.90	19.45	18.91	18.51	~	30	0
121	SDSS J232712.41-001815.7	QSO	23 27 12.4224598176	-00 18 15.713410716		18.44	18.10			~	20	0
122	SDSS J232712.98-003618.3	QSO	23 27 12.9914212584	-00 36 18.290957976		20.74	20.39			~	16	0
123	[VV2006] J232728.2+005341	QSO	23 27 28.2663666192	+00 53 41.591098752		20.31	19.94			~	24	0
124	SDSS J232742.67+000653.9	QSO	23 27 42.6752639952	+00 06 53.902010232		19.0	19.45	19.1	20.31	~	27	0
125	SDSS J232743.72+002837.0	QSO	23 27 43.7176701528	+00 28 36.983526204		20.02	19.87			~	20	0
126	SDSS J232757.24-000035.9	QSO	23 27 57.2496718560	-00 00 35.952212520		20.95	20.60	20.46	20.45	~	20	0
127	SDSS J232757.95-002058.8	QSO	23 27 57.9556550160	-00 20 58.897969296		19.71	19.42			~	23	0
128	2MASS J23280146+0017048	QSO	23 28 01.4743640304	+00 17 04.985021148		19.35	19.09	18.56	18.39	~	35	0
129	SDSS J232803.53-001656.3	Sy1	23 28 03.5401518384	-00 16 56.405456472		20.07	19.88			~	18	0
130	SDSS J232825.86+004439.7	QSO	23 28 25.8649777080	+00 44 39.693164676		19.57	19.28			~	20	0
131	SDSS J232833.50-005234.2	QSO	23 28 33.5009346240	-00 52 34.146589584		20.63	20.38			~	18	0
132	SDSS J232928.88-011405.6	QSO	23 29 28.8844523448	-01 14 05.520168996		20.38	20.18			~	16	0
133	SDSS J232930.16-000752.7	QSO	23 29 30.1684787352	-00 07 52.790483640		20.39	20.15			~	17	0
134	SDSS J232953.52+005106.6	QSO	23 29 53.5320710448	+00 51 06.619625712		19.98	19.78			~	20	0
135	SDSS J233007.17-000324.4	QSO	23 30 07.1807315640	-00 03 24.474010104		19.82	19.52			~	19	0
136	SDSS J233010.93-002951.5	QSO	23 30 10.9362391464	-00 29 51.528539652		18.72	18.61			~	20	0
137	[VV2006] J233011.4-001800	QSO	23 30 11.4283134288	-00 18 00.185202900		19.25	18.92	18.38		~	32	0
138	2SLAQ J233020.72+001727.6	Sy1	23 30 20.7189484176	+00 17 27.519457308		18.906	19.26	18.934	18.727	~	38	0
139	SDSS J233023.48+000811.8	QSO	23 30 23.4857036688	+00 08 11.840678232		19.1	19.74	18.9	19.95	~	29	0
140	SDSS J233027.81-005905.7	QSO	23 30 27.8157822216	-00 59 05.724075156		20.46	20.08			~	20	0
141	[VV2006] J233029.2+003746	QSO	23 30 29.1701263296	+00 37 46.565637240		19.30	19.19			~	33	0
142	[VV2006] J233119.8-010631	QSO	23 31 19.8079475808	-01 06 32.341369032		18.83	18.59			~	31	0
143	SDSS J233129.83-004933.2	QSO	23 31 29.8392320232	-00 49 33.263261616		20.58	19.89			~	28	0
144	[VV2006] J233133.0-005608	QSO	23 31 33.0797805264	-00 56 09.114155412		19.48	19.30			~	25	0
145	SDSS J233138.97-002429.2	QSO	23 31 38.9791870176	-00 24 29.166053184		19.99	19.77			~	22	0
146	[VV2006] J233139.3-001516	QSO	23 31 39.3319866336	-00 15 16.761189456		18.45	18.23			~	36	0
147	PB 5431	Sy1	23 31 49.4869508232	+00 07 19.492201164		19.27	18.96	18.45	18.26	~	38	0
148	SDSS J233155.01-011515.0	QSO	23 31 55.0157819328	-01 15 15.120263448		20.16	19.88			~	17	0
149	SDSS J233157.77-005130.9	QSO	23 31 57.7802430096	-00 51 31.001799456		20.29	20.17			~	17	0
150	SDSS J233229.37+002740.3	QSO	23 32 29.3774480232	+00 27 40.311152208		19.98	19.89			~	19	0
151	SDSS J233230.41+000137.6	QSO	23 32 30.4212485856	+00 01 37.661721312		20.263	20.26	20.271	20.056	~	24	0
152	2SLAQ J233315.89-000452.8	Sy1	23 33 15.8967593304	-00 04 52.924313892		20.022	19.85	20.189	20.007	~	25	0
153	SDSS J233325.16-005835.2	QSO	23 33 25.1654726976	-00 58 35.252886648		20.74	20.34			~	16	0
154	SDSS J233329.00-000308.1	QSO	23 33 29.0021822784	-00 03 08.242332804		21.08	20.78	20.43	20.30	~	22	0
155	SDSS J233330.57-004832.2	QSO	23 33 30.5704096776	-00 48 32.240107368		20.13	19.89			~	15	0
156	SDSS J233409.40-010117.9	QSO	23 34 09.4062378312	-01 01 18.004710864						~	13	0
157	[VV2006] J233411.8-011131	QSO	23 34 11.7471860400	-01 11 31.093276632		20.02	19.79			~	21	0

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