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Data:
OH
SZY95A - A survey of main-line OH maser emission from semiregular variables.
Interferometry data
Short title
: Szymczak et al. (1995A)
Authors
: Szymczak, M. Le Squeren, A. M. Sivagnanam, P. Tran Minh, F. Fournier, A.
Journal
: Astronomy and Astrophysics, v.297, p.494
Bibcode
:
1995A&A...297..494S
Abstract
We have made a high sensitivity (~0.15Jy) search in the OH main-lines for maser emission from a sample of 181 semiregular variables. OH emission was observed towards five stars. Two new OH lines were detected and one tentatively. About 10% of semiregulars with distances less than 300pc have associated OH maser emission. The OH semiregulars show much redder near and far infrared colors than similar non-OH stars. On the average, their mass loss rates and OH luminosities are slightly lower than in the long period Mira variables. Basing on the optical and infrared properties of the semiregulars and long period variables we confirmed that properties of the SRa stars are intermediate between those of SRb and Mira variables. The occurrence of strongly polarized, low luminosity OH main-line maser only, together with relatively low efficiency of pumping by the infrared photons, provides evidence that the semiregulars are less evolved than the Mira-type variables. This can support the existence of an evolutionary sequence of SRb-SRa-Mira variables. However, the expansion velocities of some OH semiregulars are higher than those observed in most type I OH Miras and their pulsational properties may suggest that they are in a peculiar evolutionary phase.
Comments:
Velocity resolution: 0.56 km/s
Upper limit for non-detections: 0.15 Jy (3σ)
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Detection table from Szymczak et al. (1995A)
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Non-detection table from Szymczak et al. (1995A)
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Display associated data
Group name
Line detection (H
2
O, OH, SiO, CH
3
OH (I), CH
3
OH (II))
IRAS source
IRAS coordinates (RA, Dec)
IRAS flux density (F12,F25,F60,F100)
2MASS source
2MASS coordinates (RA, Dec)
2MASS magnituted (J,H,K)
Variable star
Variable star parameters
Star Formation Region name
Star Formation Region parameters
WISE source
WISE coordinates (RA, Dec)
WISE magnitudes (w1, w2, w3, w4)
Akari IRC source
Akari IRC coordinates (RA, Dec)
Akari IRC fluxes (S09, S18)
Akari FIS source
Akari FIS coordinates (RA, Dec)
Akari FIS fluxes (S65, S90, S140, S160)
Continuum
Continuum coordinates (RA, Dec)
Continuum parameters
Bolocam GPS
Bolocam coordinates (RA, Dec)
Bolocam parameters
Extended Green Objects
EGO coordinates (RA, Dec)
EGO parameters
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DSS (optical)
2MASS (JHK)
WISE (4-22 um)
IRAC (3-8 um)
GLIMPSE 360 (3.6-4.5 um)
PACS color (70-160 um)
SPIRE color (250-500 um)
AKARI color (60-160 um)
NVSS (1.4 GHz)
SDSS (optical+NIR)
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Position of H
2
O maser detection
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2MASS colored
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GLIMPSE 360
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SPIRE color (250-500 um)
NVSS (1.4GHz)
UKIDSS K
2MASS K
select oh_data.ra_hms,oh_data.dec_dms,oh_data.source_name,oh_data.ra,oh_data.dec,oh_data.l,oh_data.b,oh_data.vlow,oh_data.vup,oh_data.vpeak,oh_data.vpeak_e,oh_data.vpeak2,oh_data.vpeak2_e,oh_data.dv,oh_data.other_name,oh_data.peak,oh_data.peak_e,oh_data.peak2,oh_data.peak2_e,oh_data.int,oh_data.int_e,oh_data.rms,oh_data.date,oh_data.date2,oh_data.telescope_ref,oh_data.units,oh_data.beam,oh_data.ref,oh_data.list_ref,oh_data.ascii,oh_data.image,oh_data.id,oh_data.date_txt,oh_data.freq FROM oh_data WHERE ref ilike 'SZY95A' AND detected=true AND hide=false ORDER BY detected DESC,id
