2000A&A...359..227H

Query : 2000A&A...359..227H

2000A&A...359..227H - Astronomy and Astrophysics, volume 359227-241 (2000/7-1)

X-ray emission from Lindroos binary systems.

HUELAMO N., NEUHAEUSER R., STELZER B., SUPPER R. and ZINNECKER H.

Abstract (from CDS):

We present a study of the X-ray emission from binary systems extracted from the Lindroos catalogue (Lindroos, 1986A&A...156..223L) based on the ROSAT All-Sky survey as well as ROSAT PSPC and HRI pointings. The studied sample consists of visual binary systems comprised of early-type primaries and late-type secondaries. The ages of the systems were determined by Lindroos (1985A&AS...60..183L) from uvbyβ photometry of the primaries. These ages range between 33 and 135Myr, so if the late-type secondaries are physically bound to the early-type primaries, they could be Post-T Tauri stars (PTTS). We have found strong X-ray emission from several secondaries. This fact together with their optical and IR data, make them bona fide PTTS candidates. We have also detected X-ray emission from several early-type primaries and, in particular, from most of the late-B type stars. Because their HRI hardness ratios are similar to those from resolved late-type stars, the presence of an unresolved late-type companion seems to be the cause of this emission.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: visual - stars: early-type - stars: pre-main sequence - stars: individual: HR 4796 - X-rays: stars

VizieR on-line data: <Available at CDS (J/A+A/359/227): table1.dat table2.dat table3.dat table4.dat table5.dat table6.dat table7.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 42

goto View the references in ADS

Number of rows : 42
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 * 34 Psc * 00 10 02.2030016064 +11 08 44.936910060   5.456 5.530   5.58 B9Vn 139 0
2 * 34 Psc B * 00 10 02.3863375176 +11 08 37.821568416     10.37     G5Ve 103 0
3 * 26 And * 00 18 42.1688838792 +43 47 28.108208148   6.03 6.11     B8V 66 0
4 * pi. Ari ** 02 49 17.55924 +17 27 51.5168 4.68         B6V 104 0
5 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
6 * e Tau Pu* 03 48 16.2667734169 +11 08 35.876140629 4.34 4.94 5.07     B3V 130 0
7 * chi Tau * 04 22 34.9437170088 +25 37 45.537575448   5.344 5.378     B9Vnn 111 0
8 * iot Lep ** 05 12 17.9105854648 -11 52 08.763279736 3.95 4.35 4.45     B7.5Vn 119 0
9 HD 35007 SB* 05 21 31.8439978656 -00 24 59.374321704 4.91 5.56 5.68     B5II/III 97 0
10 HD 36151 * 05 29 25.4061496128 -07 15 39.191153256 6.01 6.58 6.71     B5V 71 0
11 * 133 Tau V* 05 47 42.9074397024 +13 53 58.545937968 4.46 5.12 5.29     B2IV-V 99 0
12 * gam Col Pu* 05 57 32.2100566192 -35 16 59.811551333 3.52 4.18 4.36     B2.5IV 145 0
13 HD 43286 * 06 15 30.2432626920 +03 57 29.502818640   6.876 7.008     B5Vn 41 0
14 HD 48425 * 06 42 27.5736586344 -23 13 57.293007276   6.99 7.15     B3V 26 0
15 HD 53191 * 07 00 16.7300659176 -60 51 45.831897468   7.65 7.90     A0V 31 0
16 HD 60102 * 07 11 38.4057001464 -84 28 09.761366388   7.55 7.54     B9/9.5V 26 0
17 HD 56504 * 07 16 00.2640225216 -29 29 33.853459668   9.02 8.80     B9IV 13 0
18 HD 63465 Pu* 07 47 24.9925592232 -38 30 40.110462576 4.32 4.952 5.068     B2IV/V 77 0
19 HD 74146 SB* 08 39 57.5984976576 -53 03 17.016627132 4.48 5.05 5.19     B5IV 121 0
20 HD 77484 * 09 02 50.6528802840 +00 24 29.539648764   8.02 8.04     B9.5V 24 0
21 HD 86388 PM* 09 55 05.6004470352 -69 11 20.323749012   6.79 6.86 8.09   B9V 20 0
22 * alf Leo PM* 10 08 22.31099 +11 58 01.9516 0.88 1.24 1.40 1.37 1.47 B8IVn 891 1
23 * del Ant * 10 29 35.3788231536 -30 36 25.434381816 5.34 5.52 5.56     B9/9.5V 63 0
24 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
25 HD 104901 * 12 04 46.9772755296 -61 59 48.603026292 7.42 7.60 7.38 8.11   B8/9Iab/b 45 0
26 HD 106953 SB* 12 18 00.0710192328 -14 56 16.680887628   9.46 8.81     G5V 20 0
27 * del Crv PM* 12 29 51.8551642 -16 30 55.552542 2.80 2.89 2.94 2.99 3.03 A0IV(n)kB9 218 0
28 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
29 HD 112244 s*b 12 55 57.1336250856 -56 50 08.900570292 4.49 5.33 5.32 5.21 5.21 O8.5Iab(f)p 217 0
30 * alf02 CVn a2* 12 56 01.6655889007 +38 19 06.155170512 2.44 2.76 2.88 2.98 3.05 A0VpSiEu 707 0
31 * f Cen Pu* 13 06 16.7036641232 -48 27 47.846528742 4 4.552 4.691     B4V 121 0
32 * ksi02 Cen SB* 13 06 54.6394033029 -49 54 22.487112422 3.29 4.08 4.27     B3V 150 0
33 HD 123445 * 14 08 51.8860395336 -43 28 14.799908604   6.11 6.17     B9V 72 0
34 HD 127304 * 14 29 49.6705817016 +31 47 28.278712392   6.034 6.050     A0Vs(Si) 91 0
35 HD 127971 Pu* 14 35 31.4790402792 -41 31 02.792148564   5.79 5.87     B7V 65 0
36 HD 129791 * 14 45 57.6291990840 -44 52 03.048726072 6.96 6.96 6.92     A0V 72 0
37 * kap01 Aps Be* 15 31 30.8221293192 -73 23 22.529543604 4.60 5.37 5.49     B2Vnpe 126 0
38 * kap02 Aps Pu* 15 40 21.3550844640 -73 26 48.001931988 5.23 5.61 5.65     B7III/IV 45 0
39 V* LM Lup a2* 16 04 44.4888713016 -39 26 04.779908880   6.86 6.94   6.968 ApSiCr 73 0
40 * 12 Sco ** 16 12 16.03911 -28 25 02.3122           B9V 79 0
41 * nu.01 Lyr V* 18 49 45.9182272128 +32 48 46.146442608 5.04 5.75 5.91     B3IV 77 0
42 HD 180183 * 19 18 41.5435152024 -56 08 40.895002248 5.90 6.66 6.82     B2V 51 0

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